[1] Which organ of the body never rests?
A.
Muscles
B.
Nerves
C.
Tongue
D.
Heart
Ans:
Heart
Explanation :
Heart is the only organ in the body which never rest throughout the entire life. The heart is a hollow muscle that pumps blood throughout the blood vessels by repeated, rhythmic contractions. It is found in all animals with a circulatory system (including all vertebrates). The vertebrate heart is principally composed of cardiac muscle and connective tissue. The average human heart, beating at 72 beats per minute, will beat approximately 2.5 billion times during an average 66 year lifespan.
[2] The presence of what distinguishes a plant cell from an animal cell?
A.
Chloroplasts
B.
Cell wall
C.
Cell membrane
D.
Nucleus
Ans:
Chloroplasts
Explanation :
Plant and animal cells have several differences and similarities. Animal cells do not have chloroplasts but plant cells do. Animal cells are round and irregular in shape while plant cells have fixed, rectangular shapes. Chloroplasts are organelles found in plant cells and other eukaryotic organisms that conduct photosynthesis and other chemical reactions. Chloroplasts capture the sun’s light energy, store it in the energy storage molecules ATP and NADPH and use it in the process called photosynthesis to make organic molecules from carbon dioxide and free oxygen from water.
[3] What is the number of chromosomes in a normal human body cell?
A.
43
B.
44
C.
45
D.
46
Ans:
46
Explanation :
A chromosome is an organized structure of DNA and protein found in cells. It is a single piece of coiled DNA containing many genes, regulatory elements and other nucleotide sequences. Chromosomes also contain DNA-bound proteins, which serve to package the DNA and control its functions. Human cells have 23 Pairs of chromosomes (22 pairs of autosomes and one pair of sex chromosomes), giving a total of 46 per cell.
[4] Xerophthalmia is a deficiency disease caused by lack of -
A.
Vitamin A
B.
Vitamin B
C.
Vitamin C
D.
Vitamin D
Ans:
Vitamin A
Explanation :
Xerophthalmia is a medical condition in which the eye fails to produce tears. It may be caused by a deficiency in vitamin A and is sometimes used to describe that lack, although there may be other causes. Xerophthalmia caused by a severe vitamin A deficiency is described by pathologic dryness of the conjunctiva and cornea. The conjunctiva becomes dry, thick and wrinkled. If untreated, it can lead to corneal ulceration and ultimately to blindness as a result of corneal damage.
[5] An ant can see the objects all around it due to the presence of -
A.
Simple Eyes
B.
Eyes over the head
C.
Well-developed eyes
D.
Compound eyes
Ans:
Compound eyes
Explanation :
Compound eyes are found among the arthropods and are composed of many simple facets which, depending on the details of anatomy, may give either a single pixelated image or multiple images, per eye. Each sensor has its own lens and photosensitive cell(s). Some eyes have up to 28,000 such sensors, which are arranged hexagonally, and which can give a full 360° field of vision. Compound eyes are very sensitive to motion. With each eye viewing a different thing, a fused image from all the eyes is produced in the brain, providing very different, high-resolution images.
[6] Which among the following does not have a cell wall?
A.
Euglena
B.
Paramecium
C.
Gonyaulax
D.
Mycoplasma
Ans:
Mycoplasma
Explanation :
Mycoplasma is a genus of bacteria that lacks a cell wall around their cell membrane Without a cell wall, they are unaffected by many common antibiotics such as penicillin or other beta-lactam antibiotics that target cell wall synthesis.
[7] Hemophilia is -
A.
caused by bacteria
B.
caused by virus
C.
caused by pollutants
D.
a hereditary defect
Ans:
a hereditary defect
Explanation :
Hemophilia is a rare disorder in which your blood doesn't clot normally because it lacks sufficient blood- clotting proteins (clotting factors).
[8] Jonas Salk invented the vaccine for -
A.
Polio
B.
Hepatitis
C.
Typhoid
D.
Cholera
Ans:
Polio
Explanation :
Jonas Edward Salk was an American medical researcher and virologist, best known for his discovery and development of the first polio vaccine. The field trial set up to test the vaccine developed by Salk and his research team was the most elaborate program of its kind in history, involving 20,000 physicians and public health officers, 64,000 school personnel, and 220,000 volunteers,” with over 1,800,000 school children participating in the trial. On April 12, 1955, Dr. Thomas Francis, Jr., of the University of Michigan, the monitor of the test results, “declared the vaccine to be safe and effective.”
[9] Cancer is a disease where we find uncontrolled -
A.
cell division
B.
cell swelling
C.
cell inflammation
D.
cell deformity
Ans:
cell division
Explanation :
Cancer is the uncontrolled growth of abnormal cells in the body. Cancerous cells are also called malignant cells. Symptoms of cancer depend on the type and location of the cancer. Cancer grows out of normal cells in the body. Normal cells multiply when the body needs them, and die when the body doesn’t need them. Cancer appears to occur when the growth of cells in the body is out of control and cells divide too quickly. It can also occur when cells forget how to die. The most common cause of cancer-related death is lung cancer.
[10] Which among the following carries impure blood to human heart?
A.
Aorta
B.
Pulmonary vein
C.
Pulmonary arteries
D.
Vena Cava
Ans:
Pulmonary arteries
Explanation :
The pulmonary artery carries impure blood to the right and left lungs. The left half of the heart collects and pumps pure (oxygenated) blood from the lungs to all parts of the body.
[11] In human beings, the digestion of proteins starts in which part of the alimentary canal?
A.
Mouth
B.
Stomach
C.
Doudenum
D.
Ileum
Ans:
Stomach
Explanation :
The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach.
[12] Jaundice is a symptom of disease of -
A.
Kidney
B.
Liver
C.
Pancreas
D.
Thyroid
Ans:
Liver
Explanation :
Jaundice is a yellowish pigmentation of the skin, the conjunctival membranes over the sclerae (whites of the eyes), and other mucous membranes caused by hyperbilirubinemia (increased levels of bilirubin in the blood). This hyperbilirubinemia subsequently causes increased levels of bilirubin in the extracellular fluid. Concentration of bilirubin in blood plasma does not normally exceed 1 mg/dL (>17µmol/L). A concentration higher than 1.8 mg/dL (>30µmol/L) leads to jaundice. Jaundice is often seen in liver disease such as hepatitis or liver cancer. It may also indicate leptospirosis or obstruction of the biliary tract, for example by gallstones or pancreatic cancer, or less commonly be congenital in origin.
[13] The vaccination against small pox involves the introditetion of -
A.
killed germs
B.
weakened germs
C.
live antibodies
D.
activated germs
Ans:
weakened germs
Explanation :
The smallpox vaccine was the first successful vaccine to be developed. The process of vaccination was first publicised by Edward Jenner in 1796, who acted upon his observation that milkmaids who caught the cowpox virus did not catch smallpox. The vaccine consists of the virus which causes the related, yet far milder, cowpox disease; this virus is named vaccinia (the term vaccine is derived from it), from the Latin vacca which means cow. This vaccine has functional viruses in it. Vaccines generally consist of a weakened (attenuated) or killed antigens, associated with a particular disease that are capable of stimulating the body to make specific antibodies to that disease. Vaccines use a variety of different substances ranging from dead microorganisms to genetically engineered antigens to defend the body against potentially harmful microorganisms. Effective vaccines change the immune system by promoting the development of antibodies that can quickly and effectively attack a disease causing microorganism when it enters the body, preventing disease development.
[14] Haemophilia is a genetic disorder which leads to -
A.
decrease in haemoglobin level
B.
rheumatic heart disease
C.
decrease in WBC
D.
non-clotting of blood
Ans:
non-clotting of blood
Explanation :
Haemophilia lowers blood plasma clotting factor levels of the coagulation factors needed for a normal process of blood clotting. If bleeding occurs in normal injuries it does not stop itself.
[15] 'Mangifera indica' is the phylum of -
A.
Guava
B.
Mango
C.
Amla
D.
Jack fruit
Ans:
Mango
Explanation :
Mangifera indica is commonly known as mango. If is found in the wild in Bangladesh.
[16] Typhoid is caused by -
A.
Pseudomonas sp.
B.
Staphylococcus
C.
Bacillus
D.
Salmonella typhi
Ans:
Salmonella typhi
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi. Salmonella enterica enterica is a subspecies of Salmonella enterica, the rod shaped, flagellated, aerobic, Gram-negative bacterium. It is a member of the genus Salmonella.
[17] BCG immunization is for -
A.
Measles
B.
Tuberculosis
C.
Diphtheria
D.
Leprosy
Ans:
Tuberculosis
Explanation :
Bacillus Calmette-Guerin (BCG) is a vaccine against tuberculosis that is prepared from a strain of the attenuated (weakened) live bovine tuberculosis bacillus, Mycobacterium bovis, that has lost its virulence in humans by being specially subcultured in an artificial medium for 13 years, and also prepared from Mycobacterium tuberculosis.
[18] Which of the following crops is not harvested in March April?
A.
Paddy
B.
Wheat
C.
Mustard
D.
All of the above
Ans:
Paddy
Explanation :
Rice (paddy) is a Kharif crop that is sown in the beginning and harvested by the end of the monsoon season, the cultivation period being July to November.
[19] The noble gas used for the treatment of cancer is -
A.
Helium
B.
Argon
C.
Krypton
D.
Radon
Ans:
Radon
Explanation :
Radon was once commonly used to treat cancer. The radiation it gives off kills cancer cells. However, the element must be used with great care because radiation can kill healthy cells as well. In fact, the bad side-effects of radiation therapy are caused by the killing of healthy cells by radiation. Today, radon is not as widely used for the treatment of cancer. Radon is a radioactive element. A radioactive element is one that gives off radiation and breaks down to form a different element. Radon is formed when heavier radioactive elements, like uranium and thorium, break down. In turn, radon breaks down to form lighter elements, such as lead and bismuth.
[20] Bt seed is associated with -
A.
Rice
B.
Wheat
C.
Cotton
D.
Oil seeds
Ans:
Cotton
Explanation :
Cotton is the most popular of the Bt crops: it was planted on about 1.8 million acres (728437 ha) in 1996 and 1997. The Bt gene was isolated and transferred from a bacterium bacillus thurigiensis to American cotton. The American cotton was subsequently crossed with Indian cotton to introduce the gene into native varieties. The Bt cotton variety contains a foreign gene obtained from bacillus thuringiensis. This bacterial gene, introduced genetically into the cotton seeds, protects the plants from bollworm (A. lepidoptora), a major pest of cotton. The worm feeding on the leaves of a Bt cotton plant becomes lethargic and sleepy, thereby causing less damage to the plant.
[21] Leukaemia or blood cancer is characterised by abnormal increase of the -
A.
Red blood cells
B.
White blood cells
C.
Blood platelets
D.
Blood plasma
Ans:
White blood cells
Explanation :
Leukemia is a type of cancer of the blood or bone marrow characterized by an abnormal increase of immature white blood cells called “blasts”. Damage to the bone marrow, by way of displacing the normal bone marrow cells with higher numbers of immature white blood cells, results in a lack of blood platelets, which are important in the blood clotting process. This means people with leukemia may easily become bruised, bleed excessively, or develop pinprick bleeds (petechiae). White blood cells, which are involved in fighting pathogens, may be suppressed or dysfunctional. This could cause the patient’s immune system to be unable to fight off a simple infection or to start attacking other body cells. Because leukemia prevents the immune system from working normally, some patients experience frequent infection, ranging from infected tonsils, sores in the mouth, or diarrhea to life-threatening pneumonia or opportunistic infections. Finally, the red blood cell deficiency leads to anemia, which may cause dyspnea and pallor.
[22] Which of the following techniques can be used to establish the paternity of a child?
A.
Protein analysis
B.
Chromosome counting
C.
Quantitative analysis of DNA
D.
DNA finger printing
Ans:
DNA finger printing
Explanation :
0
[23] In `Scorpion' poison is present in the -
A.
leg
B.
hand
C.
mouth
D.
sting
Ans:
sting
Explanation :
Scorpions are predatory arthropod animals which are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger. All known scorpion species possess venom and use it primarily to kill or paralyze their prey. This venom is present in their stings.
[24] The total number of bones in man is -
A.
212
B.
206
C.
202
D.
200
Ans:
206
Explanation :
A typical adult human skeleton consists of 206 bones. These include: 22 Cranial and Facial Bones; 6 Ear Bones; 1 Throat Bone; 4 Shoulder Bones; 25 Chest Bones: 26 Vertebral. Bones; 6 Arm and Forearm bones; 54 Hand Bones; 2 Pelvic Bones; 8 Leg Bones; and 52 Foot Bones.
[25] The number of heartbeats on an average in an adult human is in the range of -
A.
60-65
B.
66-70
C.
71-80
D.
85-90
Ans:
71-80
Explanation :
The average heart rate for adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute", in actuality the heart beat rate is not and should not be constant.
Explanation :
Heart is the only organ in the body which never rest throughout the entire life. The heart is a hollow muscle that pumps blood throughout the blood vessels by repeated, rhythmic contractions. It is found in all animals with a circulatory system (including all vertebrates). The vertebrate heart is principally composed of cardiac muscle and connective tissue. The average human heart, beating at 72 beats per minute, will beat approximately 2.5 billion times during an average 66 year lifespan.
[2] The presence of what distinguishes a plant cell from an animal cell?
A.
Chloroplasts
B.
Cell wall
C.
Cell membrane
D.
Nucleus
Ans:
Chloroplasts
Explanation :
Plant and animal cells have several differences and similarities. Animal cells do not have chloroplasts but plant cells do. Animal cells are round and irregular in shape while plant cells have fixed, rectangular shapes. Chloroplasts are organelles found in plant cells and other eukaryotic organisms that conduct photosynthesis and other chemical reactions. Chloroplasts capture the sun’s light energy, store it in the energy storage molecules ATP and NADPH and use it in the process called photosynthesis to make organic molecules from carbon dioxide and free oxygen from water.
[3] What is the number of chromosomes in a normal human body cell?
A.
43
B.
44
C.
45
D.
46
Ans:
46
Explanation :
A chromosome is an organized structure of DNA and protein found in cells. It is a single piece of coiled DNA containing many genes, regulatory elements and other nucleotide sequences. Chromosomes also contain DNA-bound proteins, which serve to package the DNA and control its functions. Human cells have 23 Pairs of chromosomes (22 pairs of autosomes and one pair of sex chromosomes), giving a total of 46 per cell.
[4] Xerophthalmia is a deficiency disease caused by lack of -
A.
Vitamin A
B.
Vitamin B
C.
Vitamin C
D.
Vitamin D
Ans:
Vitamin A
Explanation :
Xerophthalmia is a medical condition in which the eye fails to produce tears. It may be caused by a deficiency in vitamin A and is sometimes used to describe that lack, although there may be other causes. Xerophthalmia caused by a severe vitamin A deficiency is described by pathologic dryness of the conjunctiva and cornea. The conjunctiva becomes dry, thick and wrinkled. If untreated, it can lead to corneal ulceration and ultimately to blindness as a result of corneal damage.
[5] An ant can see the objects all around it due to the presence of -
A.
Simple Eyes
B.
Eyes over the head
C.
Well-developed eyes
D.
Compound eyes
Ans:
Compound eyes
Explanation :
Compound eyes are found among the arthropods and are composed of many simple facets which, depending on the details of anatomy, may give either a single pixelated image or multiple images, per eye. Each sensor has its own lens and photosensitive cell(s). Some eyes have up to 28,000 such sensors, which are arranged hexagonally, and which can give a full 360° field of vision. Compound eyes are very sensitive to motion. With each eye viewing a different thing, a fused image from all the eyes is produced in the brain, providing very different, high-resolution images.
[6] Which among the following does not have a cell wall?
A.
Euglena
B.
Paramecium
C.
Gonyaulax
D.
Mycoplasma
Ans:
Mycoplasma
Explanation :
Mycoplasma is a genus of bacteria that lacks a cell wall around their cell membrane Without a cell wall, they are unaffected by many common antibiotics such as penicillin or other beta-lactam antibiotics that target cell wall synthesis.
[7] Hemophilia is -
A.
caused by bacteria
B.
caused by virus
C.
caused by pollutants
D.
a hereditary defect
Ans:
a hereditary defect
Explanation :
Hemophilia is a rare disorder in which your blood doesn't clot normally because it lacks sufficient blood- clotting proteins (clotting factors).
[8] Jonas Salk invented the vaccine for -
A.
Polio
B.
Hepatitis
C.
Typhoid
D.
Cholera
Ans:
Polio
Explanation :
Jonas Edward Salk was an American medical researcher and virologist, best known for his discovery and development of the first polio vaccine. The field trial set up to test the vaccine developed by Salk and his research team was the most elaborate program of its kind in history, involving 20,000 physicians and public health officers, 64,000 school personnel, and 220,000 volunteers,” with over 1,800,000 school children participating in the trial. On April 12, 1955, Dr. Thomas Francis, Jr., of the University of Michigan, the monitor of the test results, “declared the vaccine to be safe and effective.”
[9] Cancer is a disease where we find uncontrolled -
A.
cell division
B.
cell swelling
C.
cell inflammation
D.
cell deformity
Ans:
cell division
Explanation :
Cancer is the uncontrolled growth of abnormal cells in the body. Cancerous cells are also called malignant cells. Symptoms of cancer depend on the type and location of the cancer. Cancer grows out of normal cells in the body. Normal cells multiply when the body needs them, and die when the body doesn’t need them. Cancer appears to occur when the growth of cells in the body is out of control and cells divide too quickly. It can also occur when cells forget how to die. The most common cause of cancer-related death is lung cancer.
[10] Which among the following carries impure blood to human heart?
A.
Aorta
B.
Pulmonary vein
C.
Pulmonary arteries
D.
Vena Cava
Ans:
Pulmonary arteries
Explanation :
The pulmonary artery carries impure blood to the right and left lungs. The left half of the heart collects and pumps pure (oxygenated) blood from the lungs to all parts of the body.
[11] In human beings, the digestion of proteins starts in which part of the alimentary canal?
A.
Mouth
B.
Stomach
C.
Doudenum
D.
Ileum
Ans:
Stomach
Explanation :
The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach.
[12] Jaundice is a symptom of disease of -
A.
Kidney
B.
Liver
C.
Pancreas
D.
Thyroid
Ans:
Liver
Explanation :
Jaundice is a yellowish pigmentation of the skin, the conjunctival membranes over the sclerae (whites of the eyes), and other mucous membranes caused by hyperbilirubinemia (increased levels of bilirubin in the blood). This hyperbilirubinemia subsequently causes increased levels of bilirubin in the extracellular fluid. Concentration of bilirubin in blood plasma does not normally exceed 1 mg/dL (>17µmol/L). A concentration higher than 1.8 mg/dL (>30µmol/L) leads to jaundice. Jaundice is often seen in liver disease such as hepatitis or liver cancer. It may also indicate leptospirosis or obstruction of the biliary tract, for example by gallstones or pancreatic cancer, or less commonly be congenital in origin.
[13] The vaccination against small pox involves the introditetion of -
A.
killed germs
B.
weakened germs
C.
live antibodies
D.
activated germs
Ans:
weakened germs
Explanation :
The smallpox vaccine was the first successful vaccine to be developed. The process of vaccination was first publicised by Edward Jenner in 1796, who acted upon his observation that milkmaids who caught the cowpox virus did not catch smallpox. The vaccine consists of the virus which causes the related, yet far milder, cowpox disease; this virus is named vaccinia (the term vaccine is derived from it), from the Latin vacca which means cow. This vaccine has functional viruses in it. Vaccines generally consist of a weakened (attenuated) or killed antigens, associated with a particular disease that are capable of stimulating the body to make specific antibodies to that disease. Vaccines use a variety of different substances ranging from dead microorganisms to genetically engineered antigens to defend the body against potentially harmful microorganisms. Effective vaccines change the immune system by promoting the development of antibodies that can quickly and effectively attack a disease causing microorganism when it enters the body, preventing disease development.
[14] Haemophilia is a genetic disorder which leads to -
A.
decrease in haemoglobin level
B.
rheumatic heart disease
C.
decrease in WBC
D.
non-clotting of blood
Ans:
non-clotting of blood
Explanation :
Haemophilia lowers blood plasma clotting factor levels of the coagulation factors needed for a normal process of blood clotting. If bleeding occurs in normal injuries it does not stop itself.
[15] 'Mangifera indica' is the phylum of -
A.
Guava
B.
Mango
C.
Amla
D.
Jack fruit
Ans:
Mango
Explanation :
Mangifera indica is commonly known as mango. If is found in the wild in Bangladesh.
[16] Typhoid is caused by -
A.
Pseudomonas sp.
B.
Staphylococcus
C.
Bacillus
D.
Salmonella typhi
Ans:
Salmonella typhi
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi. Salmonella enterica enterica is a subspecies of Salmonella enterica, the rod shaped, flagellated, aerobic, Gram-negative bacterium. It is a member of the genus Salmonella.
[17] BCG immunization is for -
A.
Measles
B.
Tuberculosis
C.
Diphtheria
D.
Leprosy
Ans:
Tuberculosis
Explanation :
Bacillus Calmette-Guerin (BCG) is a vaccine against tuberculosis that is prepared from a strain of the attenuated (weakened) live bovine tuberculosis bacillus, Mycobacterium bovis, that has lost its virulence in humans by being specially subcultured in an artificial medium for 13 years, and also prepared from Mycobacterium tuberculosis.
[18] Which of the following crops is not harvested in March April?
A.
Paddy
B.
Wheat
C.
Mustard
D.
All of the above
Ans:
Paddy
Explanation :
Rice (paddy) is a Kharif crop that is sown in the beginning and harvested by the end of the monsoon season, the cultivation period being July to November.
[19] The noble gas used for the treatment of cancer is -
A.
Helium
B.
Argon
C.
Krypton
D.
Radon
Ans:
Radon
Explanation :
Radon was once commonly used to treat cancer. The radiation it gives off kills cancer cells. However, the element must be used with great care because radiation can kill healthy cells as well. In fact, the bad side-effects of radiation therapy are caused by the killing of healthy cells by radiation. Today, radon is not as widely used for the treatment of cancer. Radon is a radioactive element. A radioactive element is one that gives off radiation and breaks down to form a different element. Radon is formed when heavier radioactive elements, like uranium and thorium, break down. In turn, radon breaks down to form lighter elements, such as lead and bismuth.
[20] Bt seed is associated with -
A.
Rice
B.
Wheat
C.
Cotton
D.
Oil seeds
Ans:
Cotton
Explanation :
Cotton is the most popular of the Bt crops: it was planted on about 1.8 million acres (728437 ha) in 1996 and 1997. The Bt gene was isolated and transferred from a bacterium bacillus thurigiensis to American cotton. The American cotton was subsequently crossed with Indian cotton to introduce the gene into native varieties. The Bt cotton variety contains a foreign gene obtained from bacillus thuringiensis. This bacterial gene, introduced genetically into the cotton seeds, protects the plants from bollworm (A. lepidoptora), a major pest of cotton. The worm feeding on the leaves of a Bt cotton plant becomes lethargic and sleepy, thereby causing less damage to the plant.
[21] Leukaemia or blood cancer is characterised by abnormal increase of the -
A.
Red blood cells
B.
White blood cells
C.
Blood platelets
D.
Blood plasma
Ans:
White blood cells
Explanation :
Leukemia is a type of cancer of the blood or bone marrow characterized by an abnormal increase of immature white blood cells called “blasts”. Damage to the bone marrow, by way of displacing the normal bone marrow cells with higher numbers of immature white blood cells, results in a lack of blood platelets, which are important in the blood clotting process. This means people with leukemia may easily become bruised, bleed excessively, or develop pinprick bleeds (petechiae). White blood cells, which are involved in fighting pathogens, may be suppressed or dysfunctional. This could cause the patient’s immune system to be unable to fight off a simple infection or to start attacking other body cells. Because leukemia prevents the immune system from working normally, some patients experience frequent infection, ranging from infected tonsils, sores in the mouth, or diarrhea to life-threatening pneumonia or opportunistic infections. Finally, the red blood cell deficiency leads to anemia, which may cause dyspnea and pallor.
[22] Which of the following techniques can be used to establish the paternity of a child?
A.
Protein analysis
B.
Chromosome counting
C.
Quantitative analysis of DNA
D.
DNA finger printing
Ans:
DNA finger printing
Explanation :
0
[23] In `Scorpion' poison is present in the -
A.
leg
B.
hand
C.
mouth
D.
sting
Ans:
sting
Explanation :
Scorpions are predatory arthropod animals which are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger. All known scorpion species possess venom and use it primarily to kill or paralyze their prey. This venom is present in their stings.
[24] The total number of bones in man is -
A.
212
B.
206
C.
202
D.
200
Ans:
206
Explanation :
A typical adult human skeleton consists of 206 bones. These include: 22 Cranial and Facial Bones; 6 Ear Bones; 1 Throat Bone; 4 Shoulder Bones; 25 Chest Bones: 26 Vertebral. Bones; 6 Arm and Forearm bones; 54 Hand Bones; 2 Pelvic Bones; 8 Leg Bones; and 52 Foot Bones.
[25] The number of heartbeats on an average in an adult human is in the range of -
A.
60-65
B.
66-70
C.
71-80
D.
85-90
Ans:
71-80
Explanation :
The average heart rate for adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute", in actuality the heart beat rate is not and should not be constant.
Explanation :
A chromosome is an organized structure of DNA and protein found in cells. It is a single piece of coiled DNA containing many genes, regulatory elements and other nucleotide sequences. Chromosomes also contain DNA-bound proteins, which serve to package the DNA and control its functions. Human cells have 23 Pairs of chromosomes (22 pairs of autosomes and one pair of sex chromosomes), giving a total of 46 per cell.
[4] Xerophthalmia is a deficiency disease caused by lack of -
A.
Vitamin A
B.
Vitamin B
C.
Vitamin C
D.
Vitamin D
Ans:
Vitamin A
Explanation :
Xerophthalmia is a medical condition in which the eye fails to produce tears. It may be caused by a deficiency in vitamin A and is sometimes used to describe that lack, although there may be other causes. Xerophthalmia caused by a severe vitamin A deficiency is described by pathologic dryness of the conjunctiva and cornea. The conjunctiva becomes dry, thick and wrinkled. If untreated, it can lead to corneal ulceration and ultimately to blindness as a result of corneal damage.
[5] An ant can see the objects all around it due to the presence of -
A.
Simple Eyes
B.
Eyes over the head
C.
Well-developed eyes
D.
Compound eyes
Ans:
Compound eyes
Explanation :
Compound eyes are found among the arthropods and are composed of many simple facets which, depending on the details of anatomy, may give either a single pixelated image or multiple images, per eye. Each sensor has its own lens and photosensitive cell(s). Some eyes have up to 28,000 such sensors, which are arranged hexagonally, and which can give a full 360° field of vision. Compound eyes are very sensitive to motion. With each eye viewing a different thing, a fused image from all the eyes is produced in the brain, providing very different, high-resolution images.
[6] Which among the following does not have a cell wall?
A.
Euglena
B.
Paramecium
C.
Gonyaulax
D.
Mycoplasma
Ans:
Mycoplasma
Explanation :
Mycoplasma is a genus of bacteria that lacks a cell wall around their cell membrane Without a cell wall, they are unaffected by many common antibiotics such as penicillin or other beta-lactam antibiotics that target cell wall synthesis.
[7] Hemophilia is -
A.
caused by bacteria
B.
caused by virus
C.
caused by pollutants
D.
a hereditary defect
Ans:
a hereditary defect
Explanation :
Hemophilia is a rare disorder in which your blood doesn't clot normally because it lacks sufficient blood- clotting proteins (clotting factors).
[8] Jonas Salk invented the vaccine for -
A.
Polio
B.
Hepatitis
C.
Typhoid
D.
Cholera
Ans:
Polio
Explanation :
Jonas Edward Salk was an American medical researcher and virologist, best known for his discovery and development of the first polio vaccine. The field trial set up to test the vaccine developed by Salk and his research team was the most elaborate program of its kind in history, involving 20,000 physicians and public health officers, 64,000 school personnel, and 220,000 volunteers,” with over 1,800,000 school children participating in the trial. On April 12, 1955, Dr. Thomas Francis, Jr., of the University of Michigan, the monitor of the test results, “declared the vaccine to be safe and effective.”
[9] Cancer is a disease where we find uncontrolled -
A.
cell division
B.
cell swelling
C.
cell inflammation
D.
cell deformity
Ans:
cell division
Explanation :
Cancer is the uncontrolled growth of abnormal cells in the body. Cancerous cells are also called malignant cells. Symptoms of cancer depend on the type and location of the cancer. Cancer grows out of normal cells in the body. Normal cells multiply when the body needs them, and die when the body doesn’t need them. Cancer appears to occur when the growth of cells in the body is out of control and cells divide too quickly. It can also occur when cells forget how to die. The most common cause of cancer-related death is lung cancer.
[10] Which among the following carries impure blood to human heart?
A.
Aorta
B.
Pulmonary vein
C.
Pulmonary arteries
D.
Vena Cava
Ans:
Pulmonary arteries
Explanation :
The pulmonary artery carries impure blood to the right and left lungs. The left half of the heart collects and pumps pure (oxygenated) blood from the lungs to all parts of the body.
[11] In human beings, the digestion of proteins starts in which part of the alimentary canal?
A.
Mouth
B.
Stomach
C.
Doudenum
D.
Ileum
Ans:
Stomach
Explanation :
The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach.
[12] Jaundice is a symptom of disease of -
A.
Kidney
B.
Liver
C.
Pancreas
D.
Thyroid
Ans:
Liver
Explanation :
Jaundice is a yellowish pigmentation of the skin, the conjunctival membranes over the sclerae (whites of the eyes), and other mucous membranes caused by hyperbilirubinemia (increased levels of bilirubin in the blood). This hyperbilirubinemia subsequently causes increased levels of bilirubin in the extracellular fluid. Concentration of bilirubin in blood plasma does not normally exceed 1 mg/dL (>17µmol/L). A concentration higher than 1.8 mg/dL (>30µmol/L) leads to jaundice. Jaundice is often seen in liver disease such as hepatitis or liver cancer. It may also indicate leptospirosis or obstruction of the biliary tract, for example by gallstones or pancreatic cancer, or less commonly be congenital in origin.
[13] The vaccination against small pox involves the introditetion of -
A.
killed germs
B.
weakened germs
C.
live antibodies
D.
activated germs
Ans:
weakened germs
Explanation :
The smallpox vaccine was the first successful vaccine to be developed. The process of vaccination was first publicised by Edward Jenner in 1796, who acted upon his observation that milkmaids who caught the cowpox virus did not catch smallpox. The vaccine consists of the virus which causes the related, yet far milder, cowpox disease; this virus is named vaccinia (the term vaccine is derived from it), from the Latin vacca which means cow. This vaccine has functional viruses in it. Vaccines generally consist of a weakened (attenuated) or killed antigens, associated with a particular disease that are capable of stimulating the body to make specific antibodies to that disease. Vaccines use a variety of different substances ranging from dead microorganisms to genetically engineered antigens to defend the body against potentially harmful microorganisms. Effective vaccines change the immune system by promoting the development of antibodies that can quickly and effectively attack a disease causing microorganism when it enters the body, preventing disease development.
[14] Haemophilia is a genetic disorder which leads to -
A.
decrease in haemoglobin level
B.
rheumatic heart disease
C.
decrease in WBC
D.
non-clotting of blood
Ans:
non-clotting of blood
Explanation :
Haemophilia lowers blood plasma clotting factor levels of the coagulation factors needed for a normal process of blood clotting. If bleeding occurs in normal injuries it does not stop itself.
[15] 'Mangifera indica' is the phylum of -
A.
Guava
B.
Mango
C.
Amla
D.
Jack fruit
Ans:
Mango
Explanation :
Mangifera indica is commonly known as mango. If is found in the wild in Bangladesh.
[16] Typhoid is caused by -
A.
Pseudomonas sp.
B.
Staphylococcus
C.
Bacillus
D.
Salmonella typhi
Ans:
Salmonella typhi
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi. Salmonella enterica enterica is a subspecies of Salmonella enterica, the rod shaped, flagellated, aerobic, Gram-negative bacterium. It is a member of the genus Salmonella.
[17] BCG immunization is for -
A.
Measles
B.
Tuberculosis
C.
Diphtheria
D.
Leprosy
Ans:
Tuberculosis
Explanation :
Bacillus Calmette-Guerin (BCG) is a vaccine against tuberculosis that is prepared from a strain of the attenuated (weakened) live bovine tuberculosis bacillus, Mycobacterium bovis, that has lost its virulence in humans by being specially subcultured in an artificial medium for 13 years, and also prepared from Mycobacterium tuberculosis.
[18] Which of the following crops is not harvested in March April?
A.
Paddy
B.
Wheat
C.
Mustard
D.
All of the above
Ans:
Paddy
Explanation :
Rice (paddy) is a Kharif crop that is sown in the beginning and harvested by the end of the monsoon season, the cultivation period being July to November.
[19] The noble gas used for the treatment of cancer is -
A.
Helium
B.
Argon
C.
Krypton
D.
Radon
Ans:
Radon
Explanation :
Radon was once commonly used to treat cancer. The radiation it gives off kills cancer cells. However, the element must be used with great care because radiation can kill healthy cells as well. In fact, the bad side-effects of radiation therapy are caused by the killing of healthy cells by radiation. Today, radon is not as widely used for the treatment of cancer. Radon is a radioactive element. A radioactive element is one that gives off radiation and breaks down to form a different element. Radon is formed when heavier radioactive elements, like uranium and thorium, break down. In turn, radon breaks down to form lighter elements, such as lead and bismuth.
[20] Bt seed is associated with -
A.
Rice
B.
Wheat
C.
Cotton
D.
Oil seeds
Ans:
Cotton
Explanation :
Cotton is the most popular of the Bt crops: it was planted on about 1.8 million acres (728437 ha) in 1996 and 1997. The Bt gene was isolated and transferred from a bacterium bacillus thurigiensis to American cotton. The American cotton was subsequently crossed with Indian cotton to introduce the gene into native varieties. The Bt cotton variety contains a foreign gene obtained from bacillus thuringiensis. This bacterial gene, introduced genetically into the cotton seeds, protects the plants from bollworm (A. lepidoptora), a major pest of cotton. The worm feeding on the leaves of a Bt cotton plant becomes lethargic and sleepy, thereby causing less damage to the plant.
[21] Leukaemia or blood cancer is characterised by abnormal increase of the -
A.
Red blood cells
B.
White blood cells
C.
Blood platelets
D.
Blood plasma
Ans:
White blood cells
Explanation :
Leukemia is a type of cancer of the blood or bone marrow characterized by an abnormal increase of immature white blood cells called “blasts”. Damage to the bone marrow, by way of displacing the normal bone marrow cells with higher numbers of immature white blood cells, results in a lack of blood platelets, which are important in the blood clotting process. This means people with leukemia may easily become bruised, bleed excessively, or develop pinprick bleeds (petechiae). White blood cells, which are involved in fighting pathogens, may be suppressed or dysfunctional. This could cause the patient’s immune system to be unable to fight off a simple infection or to start attacking other body cells. Because leukemia prevents the immune system from working normally, some patients experience frequent infection, ranging from infected tonsils, sores in the mouth, or diarrhea to life-threatening pneumonia or opportunistic infections. Finally, the red blood cell deficiency leads to anemia, which may cause dyspnea and pallor.
[22] Which of the following techniques can be used to establish the paternity of a child?
A.
Protein analysis
B.
Chromosome counting
C.
Quantitative analysis of DNA
D.
DNA finger printing
Ans:
DNA finger printing
Explanation :
0
[23] In `Scorpion' poison is present in the -
A.
leg
B.
hand
C.
mouth
D.
sting
Ans:
sting
Explanation :
Scorpions are predatory arthropod animals which are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger. All known scorpion species possess venom and use it primarily to kill or paralyze their prey. This venom is present in their stings.
[24] The total number of bones in man is -
A.
212
B.
206
C.
202
D.
200
Ans:
206
Explanation :
A typical adult human skeleton consists of 206 bones. These include: 22 Cranial and Facial Bones; 6 Ear Bones; 1 Throat Bone; 4 Shoulder Bones; 25 Chest Bones: 26 Vertebral. Bones; 6 Arm and Forearm bones; 54 Hand Bones; 2 Pelvic Bones; 8 Leg Bones; and 52 Foot Bones.
[25] The number of heartbeats on an average in an adult human is in the range of -
A.
60-65
B.
66-70
C.
71-80
D.
85-90
Ans:
71-80
Explanation :
The average heart rate for adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute", in actuality the heart beat rate is not and should not be constant.
Explanation :
Compound eyes are found among the arthropods and are composed of many simple facets which, depending on the details of anatomy, may give either a single pixelated image or multiple images, per eye. Each sensor has its own lens and photosensitive cell(s). Some eyes have up to 28,000 such sensors, which are arranged hexagonally, and which can give a full 360° field of vision. Compound eyes are very sensitive to motion. With each eye viewing a different thing, a fused image from all the eyes is produced in the brain, providing very different, high-resolution images.
[6] Which among the following does not have a cell wall?
A.
Euglena
B.
Paramecium
C.
Gonyaulax
D.
Mycoplasma
Ans:
Mycoplasma
Explanation :
Mycoplasma is a genus of bacteria that lacks a cell wall around their cell membrane Without a cell wall, they are unaffected by many common antibiotics such as penicillin or other beta-lactam antibiotics that target cell wall synthesis.
[7] Hemophilia is -
A.
caused by bacteria
B.
caused by virus
C.
caused by pollutants
D.
a hereditary defect
Ans:
a hereditary defect
Explanation :
Hemophilia is a rare disorder in which your blood doesn't clot normally because it lacks sufficient blood- clotting proteins (clotting factors).
[8] Jonas Salk invented the vaccine for -
A.
Polio
B.
Hepatitis
C.
Typhoid
D.
Cholera
Ans:
Polio
Explanation :
Jonas Edward Salk was an American medical researcher and virologist, best known for his discovery and development of the first polio vaccine. The field trial set up to test the vaccine developed by Salk and his research team was the most elaborate program of its kind in history, involving 20,000 physicians and public health officers, 64,000 school personnel, and 220,000 volunteers,” with over 1,800,000 school children participating in the trial. On April 12, 1955, Dr. Thomas Francis, Jr., of the University of Michigan, the monitor of the test results, “declared the vaccine to be safe and effective.”
[9] Cancer is a disease where we find uncontrolled -
A.
cell division
B.
cell swelling
C.
cell inflammation
D.
cell deformity
Ans:
cell division
Explanation :
Cancer is the uncontrolled growth of abnormal cells in the body. Cancerous cells are also called malignant cells. Symptoms of cancer depend on the type and location of the cancer. Cancer grows out of normal cells in the body. Normal cells multiply when the body needs them, and die when the body doesn’t need them. Cancer appears to occur when the growth of cells in the body is out of control and cells divide too quickly. It can also occur when cells forget how to die. The most common cause of cancer-related death is lung cancer.
[10] Which among the following carries impure blood to human heart?
A.
Aorta
B.
Pulmonary vein
C.
Pulmonary arteries
D.
Vena Cava
Ans:
Pulmonary arteries
Explanation :
The pulmonary artery carries impure blood to the right and left lungs. The left half of the heart collects and pumps pure (oxygenated) blood from the lungs to all parts of the body.
[11] In human beings, the digestion of proteins starts in which part of the alimentary canal?
A.
Mouth
B.
Stomach
C.
Doudenum
D.
Ileum
Ans:
Stomach
Explanation :
The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach.
[12] Jaundice is a symptom of disease of -
A.
Kidney
B.
Liver
C.
Pancreas
D.
Thyroid
Ans:
Liver
Explanation :
Jaundice is a yellowish pigmentation of the skin, the conjunctival membranes over the sclerae (whites of the eyes), and other mucous membranes caused by hyperbilirubinemia (increased levels of bilirubin in the blood). This hyperbilirubinemia subsequently causes increased levels of bilirubin in the extracellular fluid. Concentration of bilirubin in blood plasma does not normally exceed 1 mg/dL (>17µmol/L). A concentration higher than 1.8 mg/dL (>30µmol/L) leads to jaundice. Jaundice is often seen in liver disease such as hepatitis or liver cancer. It may also indicate leptospirosis or obstruction of the biliary tract, for example by gallstones or pancreatic cancer, or less commonly be congenital in origin.
[13] The vaccination against small pox involves the introditetion of -
A.
killed germs
B.
weakened germs
C.
live antibodies
D.
activated germs
Ans:
weakened germs
Explanation :
The smallpox vaccine was the first successful vaccine to be developed. The process of vaccination was first publicised by Edward Jenner in 1796, who acted upon his observation that milkmaids who caught the cowpox virus did not catch smallpox. The vaccine consists of the virus which causes the related, yet far milder, cowpox disease; this virus is named vaccinia (the term vaccine is derived from it), from the Latin vacca which means cow. This vaccine has functional viruses in it. Vaccines generally consist of a weakened (attenuated) or killed antigens, associated with a particular disease that are capable of stimulating the body to make specific antibodies to that disease. Vaccines use a variety of different substances ranging from dead microorganisms to genetically engineered antigens to defend the body against potentially harmful microorganisms. Effective vaccines change the immune system by promoting the development of antibodies that can quickly and effectively attack a disease causing microorganism when it enters the body, preventing disease development.
[14] Haemophilia is a genetic disorder which leads to -
A.
decrease in haemoglobin level
B.
rheumatic heart disease
C.
decrease in WBC
D.
non-clotting of blood
Ans:
non-clotting of blood
Explanation :
Haemophilia lowers blood plasma clotting factor levels of the coagulation factors needed for a normal process of blood clotting. If bleeding occurs in normal injuries it does not stop itself.
[15] 'Mangifera indica' is the phylum of -
A.
Guava
B.
Mango
C.
Amla
D.
Jack fruit
Ans:
Mango
Explanation :
Mangifera indica is commonly known as mango. If is found in the wild in Bangladesh.
[16] Typhoid is caused by -
A.
Pseudomonas sp.
B.
Staphylococcus
C.
Bacillus
D.
Salmonella typhi
Ans:
Salmonella typhi
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi. Salmonella enterica enterica is a subspecies of Salmonella enterica, the rod shaped, flagellated, aerobic, Gram-negative bacterium. It is a member of the genus Salmonella.
[17] BCG immunization is for -
A.
Measles
B.
Tuberculosis
C.
Diphtheria
D.
Leprosy
Ans:
Tuberculosis
Explanation :
Bacillus Calmette-Guerin (BCG) is a vaccine against tuberculosis that is prepared from a strain of the attenuated (weakened) live bovine tuberculosis bacillus, Mycobacterium bovis, that has lost its virulence in humans by being specially subcultured in an artificial medium for 13 years, and also prepared from Mycobacterium tuberculosis.
[18] Which of the following crops is not harvested in March April?
A.
Paddy
B.
Wheat
C.
Mustard
D.
All of the above
Ans:
Paddy
Explanation :
Rice (paddy) is a Kharif crop that is sown in the beginning and harvested by the end of the monsoon season, the cultivation period being July to November.
[19] The noble gas used for the treatment of cancer is -
A.
Helium
B.
Argon
C.
Krypton
D.
Radon
Ans:
Radon
Explanation :
Radon was once commonly used to treat cancer. The radiation it gives off kills cancer cells. However, the element must be used with great care because radiation can kill healthy cells as well. In fact, the bad side-effects of radiation therapy are caused by the killing of healthy cells by radiation. Today, radon is not as widely used for the treatment of cancer. Radon is a radioactive element. A radioactive element is one that gives off radiation and breaks down to form a different element. Radon is formed when heavier radioactive elements, like uranium and thorium, break down. In turn, radon breaks down to form lighter elements, such as lead and bismuth.
[20] Bt seed is associated with -
A.
Rice
B.
Wheat
C.
Cotton
D.
Oil seeds
Ans:
Cotton
Explanation :
Cotton is the most popular of the Bt crops: it was planted on about 1.8 million acres (728437 ha) in 1996 and 1997. The Bt gene was isolated and transferred from a bacterium bacillus thurigiensis to American cotton. The American cotton was subsequently crossed with Indian cotton to introduce the gene into native varieties. The Bt cotton variety contains a foreign gene obtained from bacillus thuringiensis. This bacterial gene, introduced genetically into the cotton seeds, protects the plants from bollworm (A. lepidoptora), a major pest of cotton. The worm feeding on the leaves of a Bt cotton plant becomes lethargic and sleepy, thereby causing less damage to the plant.
[21] Leukaemia or blood cancer is characterised by abnormal increase of the -
A.
Red blood cells
B.
White blood cells
C.
Blood platelets
D.
Blood plasma
Ans:
White blood cells
Explanation :
Leukemia is a type of cancer of the blood or bone marrow characterized by an abnormal increase of immature white blood cells called “blasts”. Damage to the bone marrow, by way of displacing the normal bone marrow cells with higher numbers of immature white blood cells, results in a lack of blood platelets, which are important in the blood clotting process. This means people with leukemia may easily become bruised, bleed excessively, or develop pinprick bleeds (petechiae). White blood cells, which are involved in fighting pathogens, may be suppressed or dysfunctional. This could cause the patient’s immune system to be unable to fight off a simple infection or to start attacking other body cells. Because leukemia prevents the immune system from working normally, some patients experience frequent infection, ranging from infected tonsils, sores in the mouth, or diarrhea to life-threatening pneumonia or opportunistic infections. Finally, the red blood cell deficiency leads to anemia, which may cause dyspnea and pallor.
[22] Which of the following techniques can be used to establish the paternity of a child?
A.
Protein analysis
B.
Chromosome counting
C.
Quantitative analysis of DNA
D.
DNA finger printing
Ans:
DNA finger printing
Explanation :
0
[23] In `Scorpion' poison is present in the -
A.
leg
B.
hand
C.
mouth
D.
sting
Ans:
sting
Explanation :
Scorpions are predatory arthropod animals which are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger. All known scorpion species possess venom and use it primarily to kill or paralyze their prey. This venom is present in their stings.
[24] The total number of bones in man is -
A.
212
B.
206
C.
202
D.
200
Ans:
206
Explanation :
A typical adult human skeleton consists of 206 bones. These include: 22 Cranial and Facial Bones; 6 Ear Bones; 1 Throat Bone; 4 Shoulder Bones; 25 Chest Bones: 26 Vertebral. Bones; 6 Arm and Forearm bones; 54 Hand Bones; 2 Pelvic Bones; 8 Leg Bones; and 52 Foot Bones.
[25] The number of heartbeats on an average in an adult human is in the range of -
A.
60-65
B.
66-70
C.
71-80
D.
85-90
Ans:
71-80
Explanation :
The average heart rate for adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute", in actuality the heart beat rate is not and should not be constant.
Explanation :
Hemophilia is a rare disorder in which your blood doesn't clot normally because it lacks sufficient blood- clotting proteins (clotting factors).
[8] Jonas Salk invented the vaccine for -
A.
Polio
B.
Hepatitis
C.
Typhoid
D.
Cholera
Ans:
Polio
Explanation :
Jonas Edward Salk was an American medical researcher and virologist, best known for his discovery and development of the first polio vaccine. The field trial set up to test the vaccine developed by Salk and his research team was the most elaborate program of its kind in history, involving 20,000 physicians and public health officers, 64,000 school personnel, and 220,000 volunteers,” with over 1,800,000 school children participating in the trial. On April 12, 1955, Dr. Thomas Francis, Jr., of the University of Michigan, the monitor of the test results, “declared the vaccine to be safe and effective.”
[9] Cancer is a disease where we find uncontrolled -
A.
cell division
B.
cell swelling
C.
cell inflammation
D.
cell deformity
Ans:
cell division
Explanation :
Cancer is the uncontrolled growth of abnormal cells in the body. Cancerous cells are also called malignant cells. Symptoms of cancer depend on the type and location of the cancer. Cancer grows out of normal cells in the body. Normal cells multiply when the body needs them, and die when the body doesn’t need them. Cancer appears to occur when the growth of cells in the body is out of control and cells divide too quickly. It can also occur when cells forget how to die. The most common cause of cancer-related death is lung cancer.
[10] Which among the following carries impure blood to human heart?
A.
Aorta
B.
Pulmonary vein
C.
Pulmonary arteries
D.
Vena Cava
Ans:
Pulmonary arteries
Explanation :
The pulmonary artery carries impure blood to the right and left lungs. The left half of the heart collects and pumps pure (oxygenated) blood from the lungs to all parts of the body.
[11] In human beings, the digestion of proteins starts in which part of the alimentary canal?
A.
Mouth
B.
Stomach
C.
Doudenum
D.
Ileum
Ans:
Stomach
Explanation :
The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach.
[12] Jaundice is a symptom of disease of -
A.
Kidney
B.
Liver
C.
Pancreas
D.
Thyroid
Ans:
Liver
Explanation :
Jaundice is a yellowish pigmentation of the skin, the conjunctival membranes over the sclerae (whites of the eyes), and other mucous membranes caused by hyperbilirubinemia (increased levels of bilirubin in the blood). This hyperbilirubinemia subsequently causes increased levels of bilirubin in the extracellular fluid. Concentration of bilirubin in blood plasma does not normally exceed 1 mg/dL (>17µmol/L). A concentration higher than 1.8 mg/dL (>30µmol/L) leads to jaundice. Jaundice is often seen in liver disease such as hepatitis or liver cancer. It may also indicate leptospirosis or obstruction of the biliary tract, for example by gallstones or pancreatic cancer, or less commonly be congenital in origin.
[13] The vaccination against small pox involves the introditetion of -
A.
killed germs
B.
weakened germs
C.
live antibodies
D.
activated germs
Ans:
weakened germs
Explanation :
The smallpox vaccine was the first successful vaccine to be developed. The process of vaccination was first publicised by Edward Jenner in 1796, who acted upon his observation that milkmaids who caught the cowpox virus did not catch smallpox. The vaccine consists of the virus which causes the related, yet far milder, cowpox disease; this virus is named vaccinia (the term vaccine is derived from it), from the Latin vacca which means cow. This vaccine has functional viruses in it. Vaccines generally consist of a weakened (attenuated) or killed antigens, associated with a particular disease that are capable of stimulating the body to make specific antibodies to that disease. Vaccines use a variety of different substances ranging from dead microorganisms to genetically engineered antigens to defend the body against potentially harmful microorganisms. Effective vaccines change the immune system by promoting the development of antibodies that can quickly and effectively attack a disease causing microorganism when it enters the body, preventing disease development.
[14] Haemophilia is a genetic disorder which leads to -
A.
decrease in haemoglobin level
B.
rheumatic heart disease
C.
decrease in WBC
D.
non-clotting of blood
Ans:
non-clotting of blood
Explanation :
Haemophilia lowers blood plasma clotting factor levels of the coagulation factors needed for a normal process of blood clotting. If bleeding occurs in normal injuries it does not stop itself.
[15] 'Mangifera indica' is the phylum of -
A.
Guava
B.
Mango
C.
Amla
D.
Jack fruit
Ans:
Mango
Explanation :
Mangifera indica is commonly known as mango. If is found in the wild in Bangladesh.
[16] Typhoid is caused by -
A.
Pseudomonas sp.
B.
Staphylococcus
C.
Bacillus
D.
Salmonella typhi
Ans:
Salmonella typhi
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi. Salmonella enterica enterica is a subspecies of Salmonella enterica, the rod shaped, flagellated, aerobic, Gram-negative bacterium. It is a member of the genus Salmonella.
[17] BCG immunization is for -
A.
Measles
B.
Tuberculosis
C.
Diphtheria
D.
Leprosy
Ans:
Tuberculosis
Explanation :
Bacillus Calmette-Guerin (BCG) is a vaccine against tuberculosis that is prepared from a strain of the attenuated (weakened) live bovine tuberculosis bacillus, Mycobacterium bovis, that has lost its virulence in humans by being specially subcultured in an artificial medium for 13 years, and also prepared from Mycobacterium tuberculosis.
[18] Which of the following crops is not harvested in March April?
A.
Paddy
B.
Wheat
C.
Mustard
D.
All of the above
Ans:
Paddy
Explanation :
Rice (paddy) is a Kharif crop that is sown in the beginning and harvested by the end of the monsoon season, the cultivation period being July to November.
[19] The noble gas used for the treatment of cancer is -
A.
Helium
B.
Argon
C.
Krypton
D.
Radon
Ans:
Radon
Explanation :
Radon was once commonly used to treat cancer. The radiation it gives off kills cancer cells. However, the element must be used with great care because radiation can kill healthy cells as well. In fact, the bad side-effects of radiation therapy are caused by the killing of healthy cells by radiation. Today, radon is not as widely used for the treatment of cancer. Radon is a radioactive element. A radioactive element is one that gives off radiation and breaks down to form a different element. Radon is formed when heavier radioactive elements, like uranium and thorium, break down. In turn, radon breaks down to form lighter elements, such as lead and bismuth.
[20] Bt seed is associated with -
A.
Rice
B.
Wheat
C.
Cotton
D.
Oil seeds
Ans:
Cotton
Explanation :
Cotton is the most popular of the Bt crops: it was planted on about 1.8 million acres (728437 ha) in 1996 and 1997. The Bt gene was isolated and transferred from a bacterium bacillus thurigiensis to American cotton. The American cotton was subsequently crossed with Indian cotton to introduce the gene into native varieties. The Bt cotton variety contains a foreign gene obtained from bacillus thuringiensis. This bacterial gene, introduced genetically into the cotton seeds, protects the plants from bollworm (A. lepidoptora), a major pest of cotton. The worm feeding on the leaves of a Bt cotton plant becomes lethargic and sleepy, thereby causing less damage to the plant.
[21] Leukaemia or blood cancer is characterised by abnormal increase of the -
A.
Red blood cells
B.
White blood cells
C.
Blood platelets
D.
Blood plasma
Ans:
White blood cells
Explanation :
Leukemia is a type of cancer of the blood or bone marrow characterized by an abnormal increase of immature white blood cells called “blasts”. Damage to the bone marrow, by way of displacing the normal bone marrow cells with higher numbers of immature white blood cells, results in a lack of blood platelets, which are important in the blood clotting process. This means people with leukemia may easily become bruised, bleed excessively, or develop pinprick bleeds (petechiae). White blood cells, which are involved in fighting pathogens, may be suppressed or dysfunctional. This could cause the patient’s immune system to be unable to fight off a simple infection or to start attacking other body cells. Because leukemia prevents the immune system from working normally, some patients experience frequent infection, ranging from infected tonsils, sores in the mouth, or diarrhea to life-threatening pneumonia or opportunistic infections. Finally, the red blood cell deficiency leads to anemia, which may cause dyspnea and pallor.
[22] Which of the following techniques can be used to establish the paternity of a child?
A.
Protein analysis
B.
Chromosome counting
C.
Quantitative analysis of DNA
D.
DNA finger printing
Ans:
DNA finger printing
Explanation :
0
[23] In `Scorpion' poison is present in the -
A.
leg
B.
hand
C.
mouth
D.
sting
Ans:
sting
Explanation :
Scorpions are predatory arthropod animals which are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger. All known scorpion species possess venom and use it primarily to kill or paralyze their prey. This venom is present in their stings.
[24] The total number of bones in man is -
A.
212
B.
206
C.
202
D.
200
Ans:
206
Explanation :
A typical adult human skeleton consists of 206 bones. These include: 22 Cranial and Facial Bones; 6 Ear Bones; 1 Throat Bone; 4 Shoulder Bones; 25 Chest Bones: 26 Vertebral. Bones; 6 Arm and Forearm bones; 54 Hand Bones; 2 Pelvic Bones; 8 Leg Bones; and 52 Foot Bones.
[25] The number of heartbeats on an average in an adult human is in the range of -
A.
60-65
B.
66-70
C.
71-80
D.
85-90
Ans:
71-80
Explanation :
The average heart rate for adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute", in actuality the heart beat rate is not and should not be constant.
Explanation :
Cancer is the uncontrolled growth of abnormal cells in the body. Cancerous cells are also called malignant cells. Symptoms of cancer depend on the type and location of the cancer. Cancer grows out of normal cells in the body. Normal cells multiply when the body needs them, and die when the body doesn’t need them. Cancer appears to occur when the growth of cells in the body is out of control and cells divide too quickly. It can also occur when cells forget how to die. The most common cause of cancer-related death is lung cancer.
[10] Which among the following carries impure blood to human heart?
A.
Aorta
B.
Pulmonary vein
C.
Pulmonary arteries
D.
Vena Cava
Ans:
Pulmonary arteries
Explanation :
The pulmonary artery carries impure blood to the right and left lungs. The left half of the heart collects and pumps pure (oxygenated) blood from the lungs to all parts of the body.
[11] In human beings, the digestion of proteins starts in which part of the alimentary canal?
A.
Mouth
B.
Stomach
C.
Doudenum
D.
Ileum
Ans:
Stomach
Explanation :
The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach.
[12] Jaundice is a symptom of disease of -
A.
Kidney
B.
Liver
C.
Pancreas
D.
Thyroid
Ans:
Liver
Explanation :
Jaundice is a yellowish pigmentation of the skin, the conjunctival membranes over the sclerae (whites of the eyes), and other mucous membranes caused by hyperbilirubinemia (increased levels of bilirubin in the blood). This hyperbilirubinemia subsequently causes increased levels of bilirubin in the extracellular fluid. Concentration of bilirubin in blood plasma does not normally exceed 1 mg/dL (>17µmol/L). A concentration higher than 1.8 mg/dL (>30µmol/L) leads to jaundice. Jaundice is often seen in liver disease such as hepatitis or liver cancer. It may also indicate leptospirosis or obstruction of the biliary tract, for example by gallstones or pancreatic cancer, or less commonly be congenital in origin.
[13] The vaccination against small pox involves the introditetion of -
A.
killed germs
B.
weakened germs
C.
live antibodies
D.
activated germs
Ans:
weakened germs
Explanation :
The smallpox vaccine was the first successful vaccine to be developed. The process of vaccination was first publicised by Edward Jenner in 1796, who acted upon his observation that milkmaids who caught the cowpox virus did not catch smallpox. The vaccine consists of the virus which causes the related, yet far milder, cowpox disease; this virus is named vaccinia (the term vaccine is derived from it), from the Latin vacca which means cow. This vaccine has functional viruses in it. Vaccines generally consist of a weakened (attenuated) or killed antigens, associated with a particular disease that are capable of stimulating the body to make specific antibodies to that disease. Vaccines use a variety of different substances ranging from dead microorganisms to genetically engineered antigens to defend the body against potentially harmful microorganisms. Effective vaccines change the immune system by promoting the development of antibodies that can quickly and effectively attack a disease causing microorganism when it enters the body, preventing disease development.
[14] Haemophilia is a genetic disorder which leads to -
A.
decrease in haemoglobin level
B.
rheumatic heart disease
C.
decrease in WBC
D.
non-clotting of blood
Ans:
non-clotting of blood
Explanation :
Haemophilia lowers blood plasma clotting factor levels of the coagulation factors needed for a normal process of blood clotting. If bleeding occurs in normal injuries it does not stop itself.
[15] 'Mangifera indica' is the phylum of -
A.
Guava
B.
Mango
C.
Amla
D.
Jack fruit
Ans:
Mango
Explanation :
Mangifera indica is commonly known as mango. If is found in the wild in Bangladesh.
[16] Typhoid is caused by -
A.
Pseudomonas sp.
B.
Staphylococcus
C.
Bacillus
D.
Salmonella typhi
Ans:
Salmonella typhi
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi. Salmonella enterica enterica is a subspecies of Salmonella enterica, the rod shaped, flagellated, aerobic, Gram-negative bacterium. It is a member of the genus Salmonella.
[17] BCG immunization is for -
A.
Measles
B.
Tuberculosis
C.
Diphtheria
D.
Leprosy
Ans:
Tuberculosis
Explanation :
Bacillus Calmette-Guerin (BCG) is a vaccine against tuberculosis that is prepared from a strain of the attenuated (weakened) live bovine tuberculosis bacillus, Mycobacterium bovis, that has lost its virulence in humans by being specially subcultured in an artificial medium for 13 years, and also prepared from Mycobacterium tuberculosis.
[18] Which of the following crops is not harvested in March April?
A.
Paddy
B.
Wheat
C.
Mustard
D.
All of the above
Ans:
Paddy
Explanation :
Rice (paddy) is a Kharif crop that is sown in the beginning and harvested by the end of the monsoon season, the cultivation period being July to November.
[19] The noble gas used for the treatment of cancer is -
A.
Helium
B.
Argon
C.
Krypton
D.
Radon
Ans:
Radon
Explanation :
Radon was once commonly used to treat cancer. The radiation it gives off kills cancer cells. However, the element must be used with great care because radiation can kill healthy cells as well. In fact, the bad side-effects of radiation therapy are caused by the killing of healthy cells by radiation. Today, radon is not as widely used for the treatment of cancer. Radon is a radioactive element. A radioactive element is one that gives off radiation and breaks down to form a different element. Radon is formed when heavier radioactive elements, like uranium and thorium, break down. In turn, radon breaks down to form lighter elements, such as lead and bismuth.
[20] Bt seed is associated with -
A.
Rice
B.
Wheat
C.
Cotton
D.
Oil seeds
Ans:
Cotton
Explanation :
Cotton is the most popular of the Bt crops: it was planted on about 1.8 million acres (728437 ha) in 1996 and 1997. The Bt gene was isolated and transferred from a bacterium bacillus thurigiensis to American cotton. The American cotton was subsequently crossed with Indian cotton to introduce the gene into native varieties. The Bt cotton variety contains a foreign gene obtained from bacillus thuringiensis. This bacterial gene, introduced genetically into the cotton seeds, protects the plants from bollworm (A. lepidoptora), a major pest of cotton. The worm feeding on the leaves of a Bt cotton plant becomes lethargic and sleepy, thereby causing less damage to the plant.
[21] Leukaemia or blood cancer is characterised by abnormal increase of the -
A.
Red blood cells
B.
White blood cells
C.
Blood platelets
D.
Blood plasma
Ans:
White blood cells
Explanation :
Leukemia is a type of cancer of the blood or bone marrow characterized by an abnormal increase of immature white blood cells called “blasts”. Damage to the bone marrow, by way of displacing the normal bone marrow cells with higher numbers of immature white blood cells, results in a lack of blood platelets, which are important in the blood clotting process. This means people with leukemia may easily become bruised, bleed excessively, or develop pinprick bleeds (petechiae). White blood cells, which are involved in fighting pathogens, may be suppressed or dysfunctional. This could cause the patient’s immune system to be unable to fight off a simple infection or to start attacking other body cells. Because leukemia prevents the immune system from working normally, some patients experience frequent infection, ranging from infected tonsils, sores in the mouth, or diarrhea to life-threatening pneumonia or opportunistic infections. Finally, the red blood cell deficiency leads to anemia, which may cause dyspnea and pallor.
[22] Which of the following techniques can be used to establish the paternity of a child?
A.
Protein analysis
B.
Chromosome counting
C.
Quantitative analysis of DNA
D.
DNA finger printing
Ans:
DNA finger printing
Explanation :
0
[23] In `Scorpion' poison is present in the -
A.
leg
B.
hand
C.
mouth
D.
sting
Ans:
sting
Explanation :
Scorpions are predatory arthropod animals which are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger. All known scorpion species possess venom and use it primarily to kill or paralyze their prey. This venom is present in their stings.
[24] The total number of bones in man is -
A.
212
B.
206
C.
202
D.
200
Ans:
206
Explanation :
A typical adult human skeleton consists of 206 bones. These include: 22 Cranial and Facial Bones; 6 Ear Bones; 1 Throat Bone; 4 Shoulder Bones; 25 Chest Bones: 26 Vertebral. Bones; 6 Arm and Forearm bones; 54 Hand Bones; 2 Pelvic Bones; 8 Leg Bones; and 52 Foot Bones.
[25] The number of heartbeats on an average in an adult human is in the range of -
A.
60-65
B.
66-70
C.
71-80
D.
85-90
Ans:
71-80
Explanation :
The average heart rate for adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute", in actuality the heart beat rate is not and should not be constant.
Explanation :
The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach.
[12] Jaundice is a symptom of disease of -
A.
Kidney
B.
Liver
C.
Pancreas
D.
Thyroid
Ans:
Liver
Explanation :
Jaundice is a yellowish pigmentation of the skin, the conjunctival membranes over the sclerae (whites of the eyes), and other mucous membranes caused by hyperbilirubinemia (increased levels of bilirubin in the blood). This hyperbilirubinemia subsequently causes increased levels of bilirubin in the extracellular fluid. Concentration of bilirubin in blood plasma does not normally exceed 1 mg/dL (>17µmol/L). A concentration higher than 1.8 mg/dL (>30µmol/L) leads to jaundice. Jaundice is often seen in liver disease such as hepatitis or liver cancer. It may also indicate leptospirosis or obstruction of the biliary tract, for example by gallstones or pancreatic cancer, or less commonly be congenital in origin.
[13] The vaccination against small pox involves the introditetion of -
A.
killed germs
B.
weakened germs
C.
live antibodies
D.
activated germs
Ans:
weakened germs
Explanation :
The smallpox vaccine was the first successful vaccine to be developed. The process of vaccination was first publicised by Edward Jenner in 1796, who acted upon his observation that milkmaids who caught the cowpox virus did not catch smallpox. The vaccine consists of the virus which causes the related, yet far milder, cowpox disease; this virus is named vaccinia (the term vaccine is derived from it), from the Latin vacca which means cow. This vaccine has functional viruses in it. Vaccines generally consist of a weakened (attenuated) or killed antigens, associated with a particular disease that are capable of stimulating the body to make specific antibodies to that disease. Vaccines use a variety of different substances ranging from dead microorganisms to genetically engineered antigens to defend the body against potentially harmful microorganisms. Effective vaccines change the immune system by promoting the development of antibodies that can quickly and effectively attack a disease causing microorganism when it enters the body, preventing disease development.
[14] Haemophilia is a genetic disorder which leads to -
A.
decrease in haemoglobin level
B.
rheumatic heart disease
C.
decrease in WBC
D.
non-clotting of blood
Ans:
non-clotting of blood
Explanation :
Haemophilia lowers blood plasma clotting factor levels of the coagulation factors needed for a normal process of blood clotting. If bleeding occurs in normal injuries it does not stop itself.
[15] 'Mangifera indica' is the phylum of -
A.
Guava
B.
Mango
C.
Amla
D.
Jack fruit
Ans:
Mango
Explanation :
Mangifera indica is commonly known as mango. If is found in the wild in Bangladesh.
[16] Typhoid is caused by -
A.
Pseudomonas sp.
B.
Staphylococcus
C.
Bacillus
D.
Salmonella typhi
Ans:
Salmonella typhi
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi. Salmonella enterica enterica is a subspecies of Salmonella enterica, the rod shaped, flagellated, aerobic, Gram-negative bacterium. It is a member of the genus Salmonella.
[17] BCG immunization is for -
A.
Measles
B.
Tuberculosis
C.
Diphtheria
D.
Leprosy
Ans:
Tuberculosis
Explanation :
Bacillus Calmette-Guerin (BCG) is a vaccine against tuberculosis that is prepared from a strain of the attenuated (weakened) live bovine tuberculosis bacillus, Mycobacterium bovis, that has lost its virulence in humans by being specially subcultured in an artificial medium for 13 years, and also prepared from Mycobacterium tuberculosis.
[18] Which of the following crops is not harvested in March April?
A.
Paddy
B.
Wheat
C.
Mustard
D.
All of the above
Ans:
Paddy
Explanation :
Rice (paddy) is a Kharif crop that is sown in the beginning and harvested by the end of the monsoon season, the cultivation period being July to November.
[19] The noble gas used for the treatment of cancer is -
A.
Helium
B.
Argon
C.
Krypton
D.
Radon
Ans:
Radon
Explanation :
Radon was once commonly used to treat cancer. The radiation it gives off kills cancer cells. However, the element must be used with great care because radiation can kill healthy cells as well. In fact, the bad side-effects of radiation therapy are caused by the killing of healthy cells by radiation. Today, radon is not as widely used for the treatment of cancer. Radon is a radioactive element. A radioactive element is one that gives off radiation and breaks down to form a different element. Radon is formed when heavier radioactive elements, like uranium and thorium, break down. In turn, radon breaks down to form lighter elements, such as lead and bismuth.
[20] Bt seed is associated with -
A.
Rice
B.
Wheat
C.
Cotton
D.
Oil seeds
Ans:
Cotton
Explanation :
Cotton is the most popular of the Bt crops: it was planted on about 1.8 million acres (728437 ha) in 1996 and 1997. The Bt gene was isolated and transferred from a bacterium bacillus thurigiensis to American cotton. The American cotton was subsequently crossed with Indian cotton to introduce the gene into native varieties. The Bt cotton variety contains a foreign gene obtained from bacillus thuringiensis. This bacterial gene, introduced genetically into the cotton seeds, protects the plants from bollworm (A. lepidoptora), a major pest of cotton. The worm feeding on the leaves of a Bt cotton plant becomes lethargic and sleepy, thereby causing less damage to the plant.
[21] Leukaemia or blood cancer is characterised by abnormal increase of the -
A.
Red blood cells
B.
White blood cells
C.
Blood platelets
D.
Blood plasma
Ans:
White blood cells
Explanation :
Leukemia is a type of cancer of the blood or bone marrow characterized by an abnormal increase of immature white blood cells called “blasts”. Damage to the bone marrow, by way of displacing the normal bone marrow cells with higher numbers of immature white blood cells, results in a lack of blood platelets, which are important in the blood clotting process. This means people with leukemia may easily become bruised, bleed excessively, or develop pinprick bleeds (petechiae). White blood cells, which are involved in fighting pathogens, may be suppressed or dysfunctional. This could cause the patient’s immune system to be unable to fight off a simple infection or to start attacking other body cells. Because leukemia prevents the immune system from working normally, some patients experience frequent infection, ranging from infected tonsils, sores in the mouth, or diarrhea to life-threatening pneumonia or opportunistic infections. Finally, the red blood cell deficiency leads to anemia, which may cause dyspnea and pallor.
[22] Which of the following techniques can be used to establish the paternity of a child?
A.
Protein analysis
B.
Chromosome counting
C.
Quantitative analysis of DNA
D.
DNA finger printing
Ans:
DNA finger printing
Explanation :
0
[23] In `Scorpion' poison is present in the -
A.
leg
B.
hand
C.
mouth
D.
sting
Ans:
sting
Explanation :
Scorpions are predatory arthropod animals which are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger. All known scorpion species possess venom and use it primarily to kill or paralyze their prey. This venom is present in their stings.
[24] The total number of bones in man is -
A.
212
B.
206
C.
202
D.
200
Ans:
206
Explanation :
A typical adult human skeleton consists of 206 bones. These include: 22 Cranial and Facial Bones; 6 Ear Bones; 1 Throat Bone; 4 Shoulder Bones; 25 Chest Bones: 26 Vertebral. Bones; 6 Arm and Forearm bones; 54 Hand Bones; 2 Pelvic Bones; 8 Leg Bones; and 52 Foot Bones.
[25] The number of heartbeats on an average in an adult human is in the range of -
A.
60-65
B.
66-70
C.
71-80
D.
85-90
Ans:
71-80
Explanation :
The average heart rate for adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute", in actuality the heart beat rate is not and should not be constant.
Explanation :
The smallpox vaccine was the first successful vaccine to be developed. The process of vaccination was first publicised by Edward Jenner in 1796, who acted upon his observation that milkmaids who caught the cowpox virus did not catch smallpox. The vaccine consists of the virus which causes the related, yet far milder, cowpox disease; this virus is named vaccinia (the term vaccine is derived from it), from the Latin vacca which means cow. This vaccine has functional viruses in it. Vaccines generally consist of a weakened (attenuated) or killed antigens, associated with a particular disease that are capable of stimulating the body to make specific antibodies to that disease. Vaccines use a variety of different substances ranging from dead microorganisms to genetically engineered antigens to defend the body against potentially harmful microorganisms. Effective vaccines change the immune system by promoting the development of antibodies that can quickly and effectively attack a disease causing microorganism when it enters the body, preventing disease development.
[14] Haemophilia is a genetic disorder which leads to -
A.
decrease in haemoglobin level
B.
rheumatic heart disease
C.
decrease in WBC
D.
non-clotting of blood
Ans:
non-clotting of blood
Explanation :
Haemophilia lowers blood plasma clotting factor levels of the coagulation factors needed for a normal process of blood clotting. If bleeding occurs in normal injuries it does not stop itself.
[15] 'Mangifera indica' is the phylum of -
A.
Guava
B.
Mango
C.
Amla
D.
Jack fruit
Ans:
Mango
Explanation :
Mangifera indica is commonly known as mango. If is found in the wild in Bangladesh.
[16] Typhoid is caused by -
A.
Pseudomonas sp.
B.
Staphylococcus
C.
Bacillus
D.
Salmonella typhi
Ans:
Salmonella typhi
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi. Salmonella enterica enterica is a subspecies of Salmonella enterica, the rod shaped, flagellated, aerobic, Gram-negative bacterium. It is a member of the genus Salmonella.
[17] BCG immunization is for -
A.
Measles
B.
Tuberculosis
C.
Diphtheria
D.
Leprosy
Ans:
Tuberculosis
Explanation :
Bacillus Calmette-Guerin (BCG) is a vaccine against tuberculosis that is prepared from a strain of the attenuated (weakened) live bovine tuberculosis bacillus, Mycobacterium bovis, that has lost its virulence in humans by being specially subcultured in an artificial medium for 13 years, and also prepared from Mycobacterium tuberculosis.
[18] Which of the following crops is not harvested in March April?
A.
Paddy
B.
Wheat
C.
Mustard
D.
All of the above
Ans:
Paddy
Explanation :
Rice (paddy) is a Kharif crop that is sown in the beginning and harvested by the end of the monsoon season, the cultivation period being July to November.
[19] The noble gas used for the treatment of cancer is -
A.
Helium
B.
Argon
C.
Krypton
D.
Radon
Ans:
Radon
Explanation :
Radon was once commonly used to treat cancer. The radiation it gives off kills cancer cells. However, the element must be used with great care because radiation can kill healthy cells as well. In fact, the bad side-effects of radiation therapy are caused by the killing of healthy cells by radiation. Today, radon is not as widely used for the treatment of cancer. Radon is a radioactive element. A radioactive element is one that gives off radiation and breaks down to form a different element. Radon is formed when heavier radioactive elements, like uranium and thorium, break down. In turn, radon breaks down to form lighter elements, such as lead and bismuth.
[20] Bt seed is associated with -
A.
Rice
B.
Wheat
C.
Cotton
D.
Oil seeds
Ans:
Cotton
Explanation :
Cotton is the most popular of the Bt crops: it was planted on about 1.8 million acres (728437 ha) in 1996 and 1997. The Bt gene was isolated and transferred from a bacterium bacillus thurigiensis to American cotton. The American cotton was subsequently crossed with Indian cotton to introduce the gene into native varieties. The Bt cotton variety contains a foreign gene obtained from bacillus thuringiensis. This bacterial gene, introduced genetically into the cotton seeds, protects the plants from bollworm (A. lepidoptora), a major pest of cotton. The worm feeding on the leaves of a Bt cotton plant becomes lethargic and sleepy, thereby causing less damage to the plant.
[21] Leukaemia or blood cancer is characterised by abnormal increase of the -
A.
Red blood cells
B.
White blood cells
C.
Blood platelets
D.
Blood plasma
Ans:
White blood cells
Explanation :
Leukemia is a type of cancer of the blood or bone marrow characterized by an abnormal increase of immature white blood cells called “blasts”. Damage to the bone marrow, by way of displacing the normal bone marrow cells with higher numbers of immature white blood cells, results in a lack of blood platelets, which are important in the blood clotting process. This means people with leukemia may easily become bruised, bleed excessively, or develop pinprick bleeds (petechiae). White blood cells, which are involved in fighting pathogens, may be suppressed or dysfunctional. This could cause the patient’s immune system to be unable to fight off a simple infection or to start attacking other body cells. Because leukemia prevents the immune system from working normally, some patients experience frequent infection, ranging from infected tonsils, sores in the mouth, or diarrhea to life-threatening pneumonia or opportunistic infections. Finally, the red blood cell deficiency leads to anemia, which may cause dyspnea and pallor.
[22] Which of the following techniques can be used to establish the paternity of a child?
A.
Protein analysis
B.
Chromosome counting
C.
Quantitative analysis of DNA
D.
DNA finger printing
Ans:
DNA finger printing
Explanation :
0
[23] In `Scorpion' poison is present in the -
A.
leg
B.
hand
C.
mouth
D.
sting
Ans:
sting
Explanation :
Scorpions are predatory arthropod animals which are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger. All known scorpion species possess venom and use it primarily to kill or paralyze their prey. This venom is present in their stings.
[24] The total number of bones in man is -
A.
212
B.
206
C.
202
D.
200
Ans:
206
Explanation :
A typical adult human skeleton consists of 206 bones. These include: 22 Cranial and Facial Bones; 6 Ear Bones; 1 Throat Bone; 4 Shoulder Bones; 25 Chest Bones: 26 Vertebral. Bones; 6 Arm and Forearm bones; 54 Hand Bones; 2 Pelvic Bones; 8 Leg Bones; and 52 Foot Bones.
[25] The number of heartbeats on an average in an adult human is in the range of -
A.
60-65
B.
66-70
C.
71-80
D.
85-90
Ans:
71-80
Explanation :
The average heart rate for adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute", in actuality the heart beat rate is not and should not be constant.
Explanation :
Mangifera indica is commonly known as mango. If is found in the wild in Bangladesh.
[16] Typhoid is caused by -
A.
Pseudomonas sp.
B.
Staphylococcus
C.
Bacillus
D.
Salmonella typhi
Ans:
Salmonella typhi
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi. Salmonella enterica enterica is a subspecies of Salmonella enterica, the rod shaped, flagellated, aerobic, Gram-negative bacterium. It is a member of the genus Salmonella.
[17] BCG immunization is for -
A.
Measles
B.
Tuberculosis
C.
Diphtheria
D.
Leprosy
Ans:
Tuberculosis
Explanation :
Bacillus Calmette-Guerin (BCG) is a vaccine against tuberculosis that is prepared from a strain of the attenuated (weakened) live bovine tuberculosis bacillus, Mycobacterium bovis, that has lost its virulence in humans by being specially subcultured in an artificial medium for 13 years, and also prepared from Mycobacterium tuberculosis.
[18] Which of the following crops is not harvested in March April?
A.
Paddy
B.
Wheat
C.
Mustard
D.
All of the above
Ans:
Paddy
Explanation :
Rice (paddy) is a Kharif crop that is sown in the beginning and harvested by the end of the monsoon season, the cultivation period being July to November.
[19] The noble gas used for the treatment of cancer is -
A.
Helium
B.
Argon
C.
Krypton
D.
Radon
Ans:
Radon
Explanation :
Radon was once commonly used to treat cancer. The radiation it gives off kills cancer cells. However, the element must be used with great care because radiation can kill healthy cells as well. In fact, the bad side-effects of radiation therapy are caused by the killing of healthy cells by radiation. Today, radon is not as widely used for the treatment of cancer. Radon is a radioactive element. A radioactive element is one that gives off radiation and breaks down to form a different element. Radon is formed when heavier radioactive elements, like uranium and thorium, break down. In turn, radon breaks down to form lighter elements, such as lead and bismuth.
[20] Bt seed is associated with -
A.
Rice
B.
Wheat
C.
Cotton
D.
Oil seeds
Ans:
Cotton
Explanation :
Cotton is the most popular of the Bt crops: it was planted on about 1.8 million acres (728437 ha) in 1996 and 1997. The Bt gene was isolated and transferred from a bacterium bacillus thurigiensis to American cotton. The American cotton was subsequently crossed with Indian cotton to introduce the gene into native varieties. The Bt cotton variety contains a foreign gene obtained from bacillus thuringiensis. This bacterial gene, introduced genetically into the cotton seeds, protects the plants from bollworm (A. lepidoptora), a major pest of cotton. The worm feeding on the leaves of a Bt cotton plant becomes lethargic and sleepy, thereby causing less damage to the plant.
[21] Leukaemia or blood cancer is characterised by abnormal increase of the -
A.
Red blood cells
B.
White blood cells
C.
Blood platelets
D.
Blood plasma
Ans:
White blood cells
Explanation :
Leukemia is a type of cancer of the blood or bone marrow characterized by an abnormal increase of immature white blood cells called “blasts”. Damage to the bone marrow, by way of displacing the normal bone marrow cells with higher numbers of immature white blood cells, results in a lack of blood platelets, which are important in the blood clotting process. This means people with leukemia may easily become bruised, bleed excessively, or develop pinprick bleeds (petechiae). White blood cells, which are involved in fighting pathogens, may be suppressed or dysfunctional. This could cause the patient’s immune system to be unable to fight off a simple infection or to start attacking other body cells. Because leukemia prevents the immune system from working normally, some patients experience frequent infection, ranging from infected tonsils, sores in the mouth, or diarrhea to life-threatening pneumonia or opportunistic infections. Finally, the red blood cell deficiency leads to anemia, which may cause dyspnea and pallor.
[22] Which of the following techniques can be used to establish the paternity of a child?
A.
Protein analysis
B.
Chromosome counting
C.
Quantitative analysis of DNA
D.
DNA finger printing
Ans:
DNA finger printing
Explanation :
0
[23] In `Scorpion' poison is present in the -
A.
leg
B.
hand
C.
mouth
D.
sting
Ans:
sting
Explanation :
Scorpions are predatory arthropod animals which are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger. All known scorpion species possess venom and use it primarily to kill or paralyze their prey. This venom is present in their stings.
[24] The total number of bones in man is -
A.
212
B.
206
C.
202
D.
200
Ans:
206
Explanation :
A typical adult human skeleton consists of 206 bones. These include: 22 Cranial and Facial Bones; 6 Ear Bones; 1 Throat Bone; 4 Shoulder Bones; 25 Chest Bones: 26 Vertebral. Bones; 6 Arm and Forearm bones; 54 Hand Bones; 2 Pelvic Bones; 8 Leg Bones; and 52 Foot Bones.
[25] The number of heartbeats on an average in an adult human is in the range of -
A.
60-65
B.
66-70
C.
71-80
D.
85-90
Ans:
71-80
Explanation :
The average heart rate for adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute", in actuality the heart beat rate is not and should not be constant.
Explanation :
Bacillus Calmette-Guerin (BCG) is a vaccine against tuberculosis that is prepared from a strain of the attenuated (weakened) live bovine tuberculosis bacillus, Mycobacterium bovis, that has lost its virulence in humans by being specially subcultured in an artificial medium for 13 years, and also prepared from Mycobacterium tuberculosis.
[18] Which of the following crops is not harvested in March April?
A.
Paddy
B.
Wheat
C.
Mustard
D.
All of the above
Ans:
Paddy
Explanation :
Rice (paddy) is a Kharif crop that is sown in the beginning and harvested by the end of the monsoon season, the cultivation period being July to November.
[19] The noble gas used for the treatment of cancer is -
A.
Helium
B.
Argon
C.
Krypton
D.
Radon
Ans:
Radon
Explanation :
Radon was once commonly used to treat cancer. The radiation it gives off kills cancer cells. However, the element must be used with great care because radiation can kill healthy cells as well. In fact, the bad side-effects of radiation therapy are caused by the killing of healthy cells by radiation. Today, radon is not as widely used for the treatment of cancer. Radon is a radioactive element. A radioactive element is one that gives off radiation and breaks down to form a different element. Radon is formed when heavier radioactive elements, like uranium and thorium, break down. In turn, radon breaks down to form lighter elements, such as lead and bismuth.
[20] Bt seed is associated with -
A.
Rice
B.
Wheat
C.
Cotton
D.
Oil seeds
Ans:
Cotton
Explanation :
Cotton is the most popular of the Bt crops: it was planted on about 1.8 million acres (728437 ha) in 1996 and 1997. The Bt gene was isolated and transferred from a bacterium bacillus thurigiensis to American cotton. The American cotton was subsequently crossed with Indian cotton to introduce the gene into native varieties. The Bt cotton variety contains a foreign gene obtained from bacillus thuringiensis. This bacterial gene, introduced genetically into the cotton seeds, protects the plants from bollworm (A. lepidoptora), a major pest of cotton. The worm feeding on the leaves of a Bt cotton plant becomes lethargic and sleepy, thereby causing less damage to the plant.
[21] Leukaemia or blood cancer is characterised by abnormal increase of the -
A.
Red blood cells
B.
White blood cells
C.
Blood platelets
D.
Blood plasma
Ans:
White blood cells
Explanation :
Leukemia is a type of cancer of the blood or bone marrow characterized by an abnormal increase of immature white blood cells called “blasts”. Damage to the bone marrow, by way of displacing the normal bone marrow cells with higher numbers of immature white blood cells, results in a lack of blood platelets, which are important in the blood clotting process. This means people with leukemia may easily become bruised, bleed excessively, or develop pinprick bleeds (petechiae). White blood cells, which are involved in fighting pathogens, may be suppressed or dysfunctional. This could cause the patient’s immune system to be unable to fight off a simple infection or to start attacking other body cells. Because leukemia prevents the immune system from working normally, some patients experience frequent infection, ranging from infected tonsils, sores in the mouth, or diarrhea to life-threatening pneumonia or opportunistic infections. Finally, the red blood cell deficiency leads to anemia, which may cause dyspnea and pallor.
[22] Which of the following techniques can be used to establish the paternity of a child?
A.
Protein analysis
B.
Chromosome counting
C.
Quantitative analysis of DNA
D.
DNA finger printing
Ans:
DNA finger printing
Explanation :
0
[23] In `Scorpion' poison is present in the -
A.
leg
B.
hand
C.
mouth
D.
sting
Ans:
sting
Explanation :
Scorpions are predatory arthropod animals which are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger. All known scorpion species possess venom and use it primarily to kill or paralyze their prey. This venom is present in their stings.
[24] The total number of bones in man is -
A.
212
B.
206
C.
202
D.
200
Ans:
206
Explanation :
A typical adult human skeleton consists of 206 bones. These include: 22 Cranial and Facial Bones; 6 Ear Bones; 1 Throat Bone; 4 Shoulder Bones; 25 Chest Bones: 26 Vertebral. Bones; 6 Arm and Forearm bones; 54 Hand Bones; 2 Pelvic Bones; 8 Leg Bones; and 52 Foot Bones.
[25] The number of heartbeats on an average in an adult human is in the range of -
A.
60-65
B.
66-70
C.
71-80
D.
85-90
Ans:
71-80
Explanation :
The average heart rate for adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute", in actuality the heart beat rate is not and should not be constant.
Explanation :
Radon was once commonly used to treat cancer. The radiation it gives off kills cancer cells. However, the element must be used with great care because radiation can kill healthy cells as well. In fact, the bad side-effects of radiation therapy are caused by the killing of healthy cells by radiation. Today, radon is not as widely used for the treatment of cancer. Radon is a radioactive element. A radioactive element is one that gives off radiation and breaks down to form a different element. Radon is formed when heavier radioactive elements, like uranium and thorium, break down. In turn, radon breaks down to form lighter elements, such as lead and bismuth.
[20] Bt seed is associated with -
A.
Rice
B.
Wheat
C.
Cotton
D.
Oil seeds
Ans:
Cotton
Explanation :
Cotton is the most popular of the Bt crops: it was planted on about 1.8 million acres (728437 ha) in 1996 and 1997. The Bt gene was isolated and transferred from a bacterium bacillus thurigiensis to American cotton. The American cotton was subsequently crossed with Indian cotton to introduce the gene into native varieties. The Bt cotton variety contains a foreign gene obtained from bacillus thuringiensis. This bacterial gene, introduced genetically into the cotton seeds, protects the plants from bollworm (A. lepidoptora), a major pest of cotton. The worm feeding on the leaves of a Bt cotton plant becomes lethargic and sleepy, thereby causing less damage to the plant.
[21] Leukaemia or blood cancer is characterised by abnormal increase of the -
A.
Red blood cells
B.
White blood cells
C.
Blood platelets
D.
Blood plasma
Ans:
White blood cells
Explanation :
Leukemia is a type of cancer of the blood or bone marrow characterized by an abnormal increase of immature white blood cells called “blasts”. Damage to the bone marrow, by way of displacing the normal bone marrow cells with higher numbers of immature white blood cells, results in a lack of blood platelets, which are important in the blood clotting process. This means people with leukemia may easily become bruised, bleed excessively, or develop pinprick bleeds (petechiae). White blood cells, which are involved in fighting pathogens, may be suppressed or dysfunctional. This could cause the patient’s immune system to be unable to fight off a simple infection or to start attacking other body cells. Because leukemia prevents the immune system from working normally, some patients experience frequent infection, ranging from infected tonsils, sores in the mouth, or diarrhea to life-threatening pneumonia or opportunistic infections. Finally, the red blood cell deficiency leads to anemia, which may cause dyspnea and pallor.
[22] Which of the following techniques can be used to establish the paternity of a child?
A.
Protein analysis
B.
Chromosome counting
C.
Quantitative analysis of DNA
D.
DNA finger printing
Ans:
DNA finger printing
Explanation :
0
[23] In `Scorpion' poison is present in the -
A.
leg
B.
hand
C.
mouth
D.
sting
Ans:
sting
Explanation :
Scorpions are predatory arthropod animals which are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger. All known scorpion species possess venom and use it primarily to kill or paralyze their prey. This venom is present in their stings.
[24] The total number of bones in man is -
A.
212
B.
206
C.
202
D.
200
Ans:
206
Explanation :
A typical adult human skeleton consists of 206 bones. These include: 22 Cranial and Facial Bones; 6 Ear Bones; 1 Throat Bone; 4 Shoulder Bones; 25 Chest Bones: 26 Vertebral. Bones; 6 Arm and Forearm bones; 54 Hand Bones; 2 Pelvic Bones; 8 Leg Bones; and 52 Foot Bones.
[25] The number of heartbeats on an average in an adult human is in the range of -
A.
60-65
B.
66-70
C.
71-80
D.
85-90
Ans:
71-80
Explanation :
The average heart rate for adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute", in actuality the heart beat rate is not and should not be constant.
Explanation :
Leukemia is a type of cancer of the blood or bone marrow characterized by an abnormal increase of immature white blood cells called “blasts”. Damage to the bone marrow, by way of displacing the normal bone marrow cells with higher numbers of immature white blood cells, results in a lack of blood platelets, which are important in the blood clotting process. This means people with leukemia may easily become bruised, bleed excessively, or develop pinprick bleeds (petechiae). White blood cells, which are involved in fighting pathogens, may be suppressed or dysfunctional. This could cause the patient’s immune system to be unable to fight off a simple infection or to start attacking other body cells. Because leukemia prevents the immune system from working normally, some patients experience frequent infection, ranging from infected tonsils, sores in the mouth, or diarrhea to life-threatening pneumonia or opportunistic infections. Finally, the red blood cell deficiency leads to anemia, which may cause dyspnea and pallor.
[22] Which of the following techniques can be used to establish the paternity of a child?
A.
Protein analysis
B.
Chromosome counting
C.
Quantitative analysis of DNA
D.
DNA finger printing
Ans:
DNA finger printing
Explanation :
0
[23] In `Scorpion' poison is present in the -
A.
leg
B.
hand
C.
mouth
D.
sting
Ans:
sting
Explanation :
Scorpions are predatory arthropod animals which are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger. All known scorpion species possess venom and use it primarily to kill or paralyze their prey. This venom is present in their stings.
[24] The total number of bones in man is -
A.
212
B.
206
C.
202
D.
200
Ans:
206
Explanation :
A typical adult human skeleton consists of 206 bones. These include: 22 Cranial and Facial Bones; 6 Ear Bones; 1 Throat Bone; 4 Shoulder Bones; 25 Chest Bones: 26 Vertebral. Bones; 6 Arm and Forearm bones; 54 Hand Bones; 2 Pelvic Bones; 8 Leg Bones; and 52 Foot Bones.
[25] The number of heartbeats on an average in an adult human is in the range of -
A.
60-65
B.
66-70
C.
71-80
D.
85-90
Ans:
71-80
Explanation :
The average heart rate for adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute", in actuality the heart beat rate is not and should not be constant.
Explanation :
Scorpions are predatory arthropod animals which are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger. All known scorpion species possess venom and use it primarily to kill or paralyze their prey. This venom is present in their stings.
[24] The total number of bones in man is -
A.
212
B.
206
C.
202
D.
200
Ans:
206
Explanation :
A typical adult human skeleton consists of 206 bones. These include: 22 Cranial and Facial Bones; 6 Ear Bones; 1 Throat Bone; 4 Shoulder Bones; 25 Chest Bones: 26 Vertebral. Bones; 6 Arm and Forearm bones; 54 Hand Bones; 2 Pelvic Bones; 8 Leg Bones; and 52 Foot Bones.
[25] The number of heartbeats on an average in an adult human is in the range of -
A.
60-65
B.
66-70
C.
71-80
D.
85-90
Ans:
71-80
Explanation :
The average heart rate for adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute", in actuality the heart beat rate is not and should not be constant.
Explanation :
The average heart rate for adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute", in actuality the heart beat rate is not and should not be constant.