[1] If waste materials contaminate the source of drinking water, which of the following diseases will spread?
A.
Scurvy
B.
Typhoid
C.
Malaria
D.
Anaemia
Ans:
Typhoid
Explanation :
Typhoid is a systemic infection caused by Salmonella Typhi, usually through ingestion of contaminated food or water. Typhoid is spread by eating or drinking food or water contaminated with the feces of an infected person. Risk factors include poor sanitation and poor hygiene.
[2] Pneumonia is a bacterial disease caused by the type of bacteria called .
A.
Bacilli
B.
Cocci
C.
Sprilli
D.
Vibrio
Ans:
Cocci
Explanation :
Pneumonia is a bacterial disease caused by pneumoniae, a Gram-positive bacterium. It lives in the noses and throats of healthy people and can enter lungs through inhalation. Other important Gram-positive causes of pneumonia are Staphylococcus aureus and Bacillus anthracis.
[3] "Alfalfa" is the name of a -
A.
Mineral
B.
Tribe
C.
Grass
D.
Town
Ans:
Grass
Explanation :
Alfalfa, also called lucerne, is a perennial flower-frig plant in the pea family Fabaceae cultivated as an important forage crop in many countries around the world. It is used for grazing, hay, and silage, as well as a green manure and cover crop. Alfalfa is generally referred to as grass.
[4] Chlorophyll was first isolated and named by -
A.
Caventou
B.
Pelletier
C.
Chlorophyll
D.
Caventou and Pelletier
Ans:
Caventou and Pelletier
Explanation :
Chlorophyll was first isolated and named by Joseph Bienaime Caventou and Pierre Joseph Pelletier in 1817. It is a chemical found in the chloroplasts of plants that allows the plant to absorb light. Energy from the light is used in photosynthesis to make glucose.
[5] Which of the following organisms does not fit into the Cell Theory?
A.
Bacteria
B.
Virus
C.
Fungi
D.
Plants
Ans:
Virus
Explanation :
The cell theory states that all living things are made of cells, cells are the basic units of structure and function of living things, and that all cells come from other cells. Since viruses are not made of cells, and do not use cells in any of their processes, they are not related to the cell theory.
[6] Which of the following is an example of conjugated protein?
A.
Albumin
B.
Globulin
C.
Glutelin
D.
Glycoprotein
Ans:
Glycoprotein
Explanation :
A conjugated protein is a protein that functions in interaction with other (non-polypeptide) chemical groups attached by covalent bonding or weak interactions.
[7] The exchange of gases takes place in the leaves through these pores for the purpose of photosynthesis. These pores are called -
A.
Guard Cells
B.
Stomata
C.
Chloroplast
D.
None of the above
Ans:
Stomata
Explanation :
Stomata are tiny pores present on the surface of the leaves via which exchange of gases takes place in the leaves for the purpose of photosynthesis. However, exchange of gases also occurs across the surface of stems, roots and leaves as well.
[8] Goitre is caused by the deficiency of _.
A.
Zinc
B.
Calcium
C.
Iodine
D.
Chlorine
Ans:
Iodine
Explanation :
Goitre is a swelling of the neck or larynx resulting from enlargement of the thyroid gland, associated with a thyroid gland that is not functioning properly. Worldwide, over 90% cases of goitre are caused by iodine deficiency. Prevention includes adding small amounts of iodine to table salt, a product known as iodized salt.
[9] Which part of brain is also known as "little brain"?
A.
Cerebrum
B.
Cerebellum
C.
Thalamus
D.
Hypothala mus
Ans:
Cerebellum
Explanation :
The cerebellum is known as little brain. It is a region of the brain that plays an important role in motor control. It may also be involved in some cognitive functions such as attention and language, and in regulating fear and pleasure responses, but its movement-related functions are the most solidly established.
[10] Which organism is responsible for alcohol fermentation?
A.
Chlorella
B.
Yeast
C.
Agaricus
D.
Puccinia
Ans:
Yeast
Explanation :
Ethanol fermentation, also called alcoholic fermentation, is a biological process which converts sugars such as glucose, fructose, and sucrose into cellular energy, producing ethanol and carbon dioxide as a side-effect. It is an anaerobic process since Yeasts perform this conversion in the absence of oxygen.
[11] Polio is caused by -
A.
Bacteria
B.
Virus
C.
Fungus
D.
Protozoa
Ans:
Virus
Explanation :
Poliomyelitis, often called polio or infantile paralysis, is an infectious disease caused by the poliovirus, Poliovirus is usually spread from person to person through infected fecal matter entering the mouth. It may also be spread by food or water containing human feces and less commonly from infected saliva.
[12] Copper is associated with mitochondria' enzymes.
A.
Cytochrome oxidase
B.
Succinic dehydrogenase
C.
Catalase
D.
Acid phosphatase
Ans:
Cytochrome oxidase
Explanation :
Copper is involved in normalized function of many enzymes, such as cytochrome oxidase, which is complex IV in mitochondrial electron transport chain, ceruloplasmin, Cu/Zn superoxide dismutase, and in amine oxidases. These enzymes catalyze reactions for oxidative phosphorylation, iron transportation, antioxidant and free radical scavenging and neutralization, and neurotransmitter synthesis, respectively.
[13] Metals can be at room temperature.
A.
Liquid only
B.
Solid only
C.
Solid or liquid
D.
Solid, liquid or gas
Ans:
Solid or liquid
Explanation :
All metals except Mercury are solid at room temperature. Mercury is the only metallic element that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions is bromine.
[14] BOD stands for :
A.
Biological oxidation demand
B.
Biological oxygen demand
C.
Biochemical oxygen demand
D.
Biotic oxidation demand
Ans:
Biochemical oxygen demand
Explanation :
BOD stands for Biochemical Oxygen Demand. It is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period. The BOD value is most commonly expressed in milligrams of oxygen consumed per litre of sample during 5 days of incubation at 20°C.
[15] Addition excessive amounts of heat to a lake is referred to as -
A.
Refrigeration effect
B.
Green House effect
C.
Thermal pollution
D.
Heat Bloom
Ans:
Thermal pollution
Explanation :
Thermal pollution is defined as the addition of excess of undesirable heat to water thereby making it harmful to man, animal or aquatic life. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. The change in ambient temperature of water decreases oxygen supply and affects ecosystem com-position.
[16] Mycotoxins are produced by -
A.
Bacteria
B.
Algae
C.
Viruses
D.
Fungi
Ans:
Fungi
Explanation :
Aflatoxin are naturally occurring mycotoxins that are produced by Aspergillus flavus and Aspergillus parasiticus, species of fungi. They have been associated with various diseases, such as aflatoxicosis, in livestock, domestic animals and humans throughout the world.
[17] Red rot of sugarcane is caused by -
A.
Alternaria alternata
B.
Phylophthora infestans
C.
Colletotrichum falcaturn
D.
Cercospora personata
Ans:
Colletotrichum falcaturn
Explanation :
Red rot disease is caused by the fungus Glomerella tucurnanensis. An older name, Colletotrichum falcatum, is still preferred by some pathologists. Red rot occurs in various parts of the cane plant but it is usually considered a stalk and a seed-piece disease. Its symptoms are highly variable depending upon the susceptibility of the sugarcane variety and the environment.
[18] The fleshy thalamus is edible in -
A.
Apple
B.
Tomato
C.
Orange
D.
Mango
Ans:
Apple
Explanation :
Apple is a pome, a simple, fleshy but false fruit as it is surrounded by a fleshy thalamus which is edible while actual fruit lies within other examples are pear, loquat, etc.
[19] The sense of balance is achieved by -
A.
Cerebrum equilibrium
B.
Thalamus equilibrium
C.
Cerebellum equilibrium
D.
Spinal cord equilibrium
Ans:
Cerebellum equilibrium
Explanation :
The cerebellum equilibrium controls the aspects of balance, equilibrium, and muscle tone, `which are factors that provide for smooth movement and activity. Electrical impulses from the cerebellum stimulate muscles that are responsible for voluntary movement, and it works in coordination with the motor cortices of the cerebrum for this overall function.
[20] Bacterial cells do not have -
A.
Cell wall
B.
Plasma membrane
C.
Ribosome
D.
Mitochondria
Ans:
Mitochondria
Explanation :
Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Bacteria are prokaiyotes, which, by definition, are cells that don't possess membrane-bound organelles. Mitochondria are membrane-bound organelles.
[21] A cellulosic wall is found in the cells of -
A.
animals
B.
bacteria
C.
fungi
D.
plants
Ans:
plants
Explanation :
Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes. It is a complex carbohydrate, that is composed of glucose units.
[22] The filtration unit of kidney is -
A.
axon
B.
nephron
C.
neuron
D.
yellow fiber
Ans:
nephron
Explanation :
Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
[23] The heart rate in an adult person is -
A.
50-60 times per minute
B.
70-80 times per hour
C.
70-80 times per second
D.
70-80 times per minute
Ans:
70-80 times per minute
Explanation :
Heart rate refers to the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute (bpm). The normal human heart rate ranges from 60-100 bpm; however 70-80 bpm is treated as the normal in adults.
[24] Which of the following is a tapeworm?
A.
Fasciola
B.
Schistosoma
C.
Taenia
D.
Enterobius
Ans:
Taenia
Explanation :
Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglotticis.
[25] Bacteriophage was discovered by -
A.
Felix d'Herelle and Frederick Twort
B.
Kluyver and Niel
C.
Paul Ehrlich
D.
Burrill and Smith
Ans:
Felix d'Herelle and Frederick Twort
Explanation :
Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Felix d'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:.
Explanation :
Typhoid is a systemic infection caused by Salmonella Typhi, usually through ingestion of contaminated food or water. Typhoid is spread by eating or drinking food or water contaminated with the feces of an infected person. Risk factors include poor sanitation and poor hygiene.
[2] Pneumonia is a bacterial disease caused by the type of bacteria called .
A.
Bacilli
B.
Cocci
C.
Sprilli
D.
Vibrio
Ans:
Cocci
Explanation :
Pneumonia is a bacterial disease caused by pneumoniae, a Gram-positive bacterium. It lives in the noses and throats of healthy people and can enter lungs through inhalation. Other important Gram-positive causes of pneumonia are Staphylococcus aureus and Bacillus anthracis.
[3] "Alfalfa" is the name of a -
A.
Mineral
B.
Tribe
C.
Grass
D.
Town
Ans:
Grass
Explanation :
Alfalfa, also called lucerne, is a perennial flower-frig plant in the pea family Fabaceae cultivated as an important forage crop in many countries around the world. It is used for grazing, hay, and silage, as well as a green manure and cover crop. Alfalfa is generally referred to as grass.
[4] Chlorophyll was first isolated and named by -
A.
Caventou
B.
Pelletier
C.
Chlorophyll
D.
Caventou and Pelletier
Ans:
Caventou and Pelletier
Explanation :
Chlorophyll was first isolated and named by Joseph Bienaime Caventou and Pierre Joseph Pelletier in 1817. It is a chemical found in the chloroplasts of plants that allows the plant to absorb light. Energy from the light is used in photosynthesis to make glucose.
[5] Which of the following organisms does not fit into the Cell Theory?
A.
Bacteria
B.
Virus
C.
Fungi
D.
Plants
Ans:
Virus
Explanation :
The cell theory states that all living things are made of cells, cells are the basic units of structure and function of living things, and that all cells come from other cells. Since viruses are not made of cells, and do not use cells in any of their processes, they are not related to the cell theory.
[6] Which of the following is an example of conjugated protein?
A.
Albumin
B.
Globulin
C.
Glutelin
D.
Glycoprotein
Ans:
Glycoprotein
Explanation :
A conjugated protein is a protein that functions in interaction with other (non-polypeptide) chemical groups attached by covalent bonding or weak interactions.
[7] The exchange of gases takes place in the leaves through these pores for the purpose of photosynthesis. These pores are called -
A.
Guard Cells
B.
Stomata
C.
Chloroplast
D.
None of the above
Ans:
Stomata
Explanation :
Stomata are tiny pores present on the surface of the leaves via which exchange of gases takes place in the leaves for the purpose of photosynthesis. However, exchange of gases also occurs across the surface of stems, roots and leaves as well.
[8] Goitre is caused by the deficiency of _.
A.
Zinc
B.
Calcium
C.
Iodine
D.
Chlorine
Ans:
Iodine
Explanation :
Goitre is a swelling of the neck or larynx resulting from enlargement of the thyroid gland, associated with a thyroid gland that is not functioning properly. Worldwide, over 90% cases of goitre are caused by iodine deficiency. Prevention includes adding small amounts of iodine to table salt, a product known as iodized salt.
[9] Which part of brain is also known as "little brain"?
A.
Cerebrum
B.
Cerebellum
C.
Thalamus
D.
Hypothala mus
Ans:
Cerebellum
Explanation :
The cerebellum is known as little brain. It is a region of the brain that plays an important role in motor control. It may also be involved in some cognitive functions such as attention and language, and in regulating fear and pleasure responses, but its movement-related functions are the most solidly established.
[10] Which organism is responsible for alcohol fermentation?
A.
Chlorella
B.
Yeast
C.
Agaricus
D.
Puccinia
Ans:
Yeast
Explanation :
Ethanol fermentation, also called alcoholic fermentation, is a biological process which converts sugars such as glucose, fructose, and sucrose into cellular energy, producing ethanol and carbon dioxide as a side-effect. It is an anaerobic process since Yeasts perform this conversion in the absence of oxygen.
[11] Polio is caused by -
A.
Bacteria
B.
Virus
C.
Fungus
D.
Protozoa
Ans:
Virus
Explanation :
Poliomyelitis, often called polio or infantile paralysis, is an infectious disease caused by the poliovirus, Poliovirus is usually spread from person to person through infected fecal matter entering the mouth. It may also be spread by food or water containing human feces and less commonly from infected saliva.
[12] Copper is associated with mitochondria' enzymes.
A.
Cytochrome oxidase
B.
Succinic dehydrogenase
C.
Catalase
D.
Acid phosphatase
Ans:
Cytochrome oxidase
Explanation :
Copper is involved in normalized function of many enzymes, such as cytochrome oxidase, which is complex IV in mitochondrial electron transport chain, ceruloplasmin, Cu/Zn superoxide dismutase, and in amine oxidases. These enzymes catalyze reactions for oxidative phosphorylation, iron transportation, antioxidant and free radical scavenging and neutralization, and neurotransmitter synthesis, respectively.
[13] Metals can be at room temperature.
A.
Liquid only
B.
Solid only
C.
Solid or liquid
D.
Solid, liquid or gas
Ans:
Solid or liquid
Explanation :
All metals except Mercury are solid at room temperature. Mercury is the only metallic element that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions is bromine.
[14] BOD stands for :
A.
Biological oxidation demand
B.
Biological oxygen demand
C.
Biochemical oxygen demand
D.
Biotic oxidation demand
Ans:
Biochemical oxygen demand
Explanation :
BOD stands for Biochemical Oxygen Demand. It is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period. The BOD value is most commonly expressed in milligrams of oxygen consumed per litre of sample during 5 days of incubation at 20°C.
[15] Addition excessive amounts of heat to a lake is referred to as -
A.
Refrigeration effect
B.
Green House effect
C.
Thermal pollution
D.
Heat Bloom
Ans:
Thermal pollution
Explanation :
Thermal pollution is defined as the addition of excess of undesirable heat to water thereby making it harmful to man, animal or aquatic life. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. The change in ambient temperature of water decreases oxygen supply and affects ecosystem com-position.
[16] Mycotoxins are produced by -
A.
Bacteria
B.
Algae
C.
Viruses
D.
Fungi
Ans:
Fungi
Explanation :
Aflatoxin are naturally occurring mycotoxins that are produced by Aspergillus flavus and Aspergillus parasiticus, species of fungi. They have been associated with various diseases, such as aflatoxicosis, in livestock, domestic animals and humans throughout the world.
[17] Red rot of sugarcane is caused by -
A.
Alternaria alternata
B.
Phylophthora infestans
C.
Colletotrichum falcaturn
D.
Cercospora personata
Ans:
Colletotrichum falcaturn
Explanation :
Red rot disease is caused by the fungus Glomerella tucurnanensis. An older name, Colletotrichum falcatum, is still preferred by some pathologists. Red rot occurs in various parts of the cane plant but it is usually considered a stalk and a seed-piece disease. Its symptoms are highly variable depending upon the susceptibility of the sugarcane variety and the environment.
[18] The fleshy thalamus is edible in -
A.
Apple
B.
Tomato
C.
Orange
D.
Mango
Ans:
Apple
Explanation :
Apple is a pome, a simple, fleshy but false fruit as it is surrounded by a fleshy thalamus which is edible while actual fruit lies within other examples are pear, loquat, etc.
[19] The sense of balance is achieved by -
A.
Cerebrum equilibrium
B.
Thalamus equilibrium
C.
Cerebellum equilibrium
D.
Spinal cord equilibrium
Ans:
Cerebellum equilibrium
Explanation :
The cerebellum equilibrium controls the aspects of balance, equilibrium, and muscle tone, `which are factors that provide for smooth movement and activity. Electrical impulses from the cerebellum stimulate muscles that are responsible for voluntary movement, and it works in coordination with the motor cortices of the cerebrum for this overall function.
[20] Bacterial cells do not have -
A.
Cell wall
B.
Plasma membrane
C.
Ribosome
D.
Mitochondria
Ans:
Mitochondria
Explanation :
Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Bacteria are prokaiyotes, which, by definition, are cells that don't possess membrane-bound organelles. Mitochondria are membrane-bound organelles.
[21] A cellulosic wall is found in the cells of -
A.
animals
B.
bacteria
C.
fungi
D.
plants
Ans:
plants
Explanation :
Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes. It is a complex carbohydrate, that is composed of glucose units.
[22] The filtration unit of kidney is -
A.
axon
B.
nephron
C.
neuron
D.
yellow fiber
Ans:
nephron
Explanation :
Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
[23] The heart rate in an adult person is -
A.
50-60 times per minute
B.
70-80 times per hour
C.
70-80 times per second
D.
70-80 times per minute
Ans:
70-80 times per minute
Explanation :
Heart rate refers to the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute (bpm). The normal human heart rate ranges from 60-100 bpm; however 70-80 bpm is treated as the normal in adults.
[24] Which of the following is a tapeworm?
A.
Fasciola
B.
Schistosoma
C.
Taenia
D.
Enterobius
Ans:
Taenia
Explanation :
Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglotticis.
[25] Bacteriophage was discovered by -
A.
Felix d'Herelle and Frederick Twort
B.
Kluyver and Niel
C.
Paul Ehrlich
D.
Burrill and Smith
Ans:
Felix d'Herelle and Frederick Twort
Explanation :
Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Felix d'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:.
Explanation :
Alfalfa, also called lucerne, is a perennial flower-frig plant in the pea family Fabaceae cultivated as an important forage crop in many countries around the world. It is used for grazing, hay, and silage, as well as a green manure and cover crop. Alfalfa is generally referred to as grass.
[4] Chlorophyll was first isolated and named by -
A.
Caventou
B.
Pelletier
C.
Chlorophyll
D.
Caventou and Pelletier
Ans:
Caventou and Pelletier
Explanation :
Chlorophyll was first isolated and named by Joseph Bienaime Caventou and Pierre Joseph Pelletier in 1817. It is a chemical found in the chloroplasts of plants that allows the plant to absorb light. Energy from the light is used in photosynthesis to make glucose.
[5] Which of the following organisms does not fit into the Cell Theory?
A.
Bacteria
B.
Virus
C.
Fungi
D.
Plants
Ans:
Virus
Explanation :
The cell theory states that all living things are made of cells, cells are the basic units of structure and function of living things, and that all cells come from other cells. Since viruses are not made of cells, and do not use cells in any of their processes, they are not related to the cell theory.
[6] Which of the following is an example of conjugated protein?
A.
Albumin
B.
Globulin
C.
Glutelin
D.
Glycoprotein
Ans:
Glycoprotein
Explanation :
A conjugated protein is a protein that functions in interaction with other (non-polypeptide) chemical groups attached by covalent bonding or weak interactions.
[7] The exchange of gases takes place in the leaves through these pores for the purpose of photosynthesis. These pores are called -
A.
Guard Cells
B.
Stomata
C.
Chloroplast
D.
None of the above
Ans:
Stomata
Explanation :
Stomata are tiny pores present on the surface of the leaves via which exchange of gases takes place in the leaves for the purpose of photosynthesis. However, exchange of gases also occurs across the surface of stems, roots and leaves as well.
[8] Goitre is caused by the deficiency of _.
A.
Zinc
B.
Calcium
C.
Iodine
D.
Chlorine
Ans:
Iodine
Explanation :
Goitre is a swelling of the neck or larynx resulting from enlargement of the thyroid gland, associated with a thyroid gland that is not functioning properly. Worldwide, over 90% cases of goitre are caused by iodine deficiency. Prevention includes adding small amounts of iodine to table salt, a product known as iodized salt.
[9] Which part of brain is also known as "little brain"?
A.
Cerebrum
B.
Cerebellum
C.
Thalamus
D.
Hypothala mus
Ans:
Cerebellum
Explanation :
The cerebellum is known as little brain. It is a region of the brain that plays an important role in motor control. It may also be involved in some cognitive functions such as attention and language, and in regulating fear and pleasure responses, but its movement-related functions are the most solidly established.
[10] Which organism is responsible for alcohol fermentation?
A.
Chlorella
B.
Yeast
C.
Agaricus
D.
Puccinia
Ans:
Yeast
Explanation :
Ethanol fermentation, also called alcoholic fermentation, is a biological process which converts sugars such as glucose, fructose, and sucrose into cellular energy, producing ethanol and carbon dioxide as a side-effect. It is an anaerobic process since Yeasts perform this conversion in the absence of oxygen.
[11] Polio is caused by -
A.
Bacteria
B.
Virus
C.
Fungus
D.
Protozoa
Ans:
Virus
Explanation :
Poliomyelitis, often called polio or infantile paralysis, is an infectious disease caused by the poliovirus, Poliovirus is usually spread from person to person through infected fecal matter entering the mouth. It may also be spread by food or water containing human feces and less commonly from infected saliva.
[12] Copper is associated with mitochondria' enzymes.
A.
Cytochrome oxidase
B.
Succinic dehydrogenase
C.
Catalase
D.
Acid phosphatase
Ans:
Cytochrome oxidase
Explanation :
Copper is involved in normalized function of many enzymes, such as cytochrome oxidase, which is complex IV in mitochondrial electron transport chain, ceruloplasmin, Cu/Zn superoxide dismutase, and in amine oxidases. These enzymes catalyze reactions for oxidative phosphorylation, iron transportation, antioxidant and free radical scavenging and neutralization, and neurotransmitter synthesis, respectively.
[13] Metals can be at room temperature.
A.
Liquid only
B.
Solid only
C.
Solid or liquid
D.
Solid, liquid or gas
Ans:
Solid or liquid
Explanation :
All metals except Mercury are solid at room temperature. Mercury is the only metallic element that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions is bromine.
[14] BOD stands for :
A.
Biological oxidation demand
B.
Biological oxygen demand
C.
Biochemical oxygen demand
D.
Biotic oxidation demand
Ans:
Biochemical oxygen demand
Explanation :
BOD stands for Biochemical Oxygen Demand. It is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period. The BOD value is most commonly expressed in milligrams of oxygen consumed per litre of sample during 5 days of incubation at 20°C.
[15] Addition excessive amounts of heat to a lake is referred to as -
A.
Refrigeration effect
B.
Green House effect
C.
Thermal pollution
D.
Heat Bloom
Ans:
Thermal pollution
Explanation :
Thermal pollution is defined as the addition of excess of undesirable heat to water thereby making it harmful to man, animal or aquatic life. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. The change in ambient temperature of water decreases oxygen supply and affects ecosystem com-position.
[16] Mycotoxins are produced by -
A.
Bacteria
B.
Algae
C.
Viruses
D.
Fungi
Ans:
Fungi
Explanation :
Aflatoxin are naturally occurring mycotoxins that are produced by Aspergillus flavus and Aspergillus parasiticus, species of fungi. They have been associated with various diseases, such as aflatoxicosis, in livestock, domestic animals and humans throughout the world.
[17] Red rot of sugarcane is caused by -
A.
Alternaria alternata
B.
Phylophthora infestans
C.
Colletotrichum falcaturn
D.
Cercospora personata
Ans:
Colletotrichum falcaturn
Explanation :
Red rot disease is caused by the fungus Glomerella tucurnanensis. An older name, Colletotrichum falcatum, is still preferred by some pathologists. Red rot occurs in various parts of the cane plant but it is usually considered a stalk and a seed-piece disease. Its symptoms are highly variable depending upon the susceptibility of the sugarcane variety and the environment.
[18] The fleshy thalamus is edible in -
A.
Apple
B.
Tomato
C.
Orange
D.
Mango
Ans:
Apple
Explanation :
Apple is a pome, a simple, fleshy but false fruit as it is surrounded by a fleshy thalamus which is edible while actual fruit lies within other examples are pear, loquat, etc.
[19] The sense of balance is achieved by -
A.
Cerebrum equilibrium
B.
Thalamus equilibrium
C.
Cerebellum equilibrium
D.
Spinal cord equilibrium
Ans:
Cerebellum equilibrium
Explanation :
The cerebellum equilibrium controls the aspects of balance, equilibrium, and muscle tone, `which are factors that provide for smooth movement and activity. Electrical impulses from the cerebellum stimulate muscles that are responsible for voluntary movement, and it works in coordination with the motor cortices of the cerebrum for this overall function.
[20] Bacterial cells do not have -
A.
Cell wall
B.
Plasma membrane
C.
Ribosome
D.
Mitochondria
Ans:
Mitochondria
Explanation :
Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Bacteria are prokaiyotes, which, by definition, are cells that don't possess membrane-bound organelles. Mitochondria are membrane-bound organelles.
[21] A cellulosic wall is found in the cells of -
A.
animals
B.
bacteria
C.
fungi
D.
plants
Ans:
plants
Explanation :
Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes. It is a complex carbohydrate, that is composed of glucose units.
[22] The filtration unit of kidney is -
A.
axon
B.
nephron
C.
neuron
D.
yellow fiber
Ans:
nephron
Explanation :
Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
[23] The heart rate in an adult person is -
A.
50-60 times per minute
B.
70-80 times per hour
C.
70-80 times per second
D.
70-80 times per minute
Ans:
70-80 times per minute
Explanation :
Heart rate refers to the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute (bpm). The normal human heart rate ranges from 60-100 bpm; however 70-80 bpm is treated as the normal in adults.
[24] Which of the following is a tapeworm?
A.
Fasciola
B.
Schistosoma
C.
Taenia
D.
Enterobius
Ans:
Taenia
Explanation :
Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglotticis.
[25] Bacteriophage was discovered by -
A.
Felix d'Herelle and Frederick Twort
B.
Kluyver and Niel
C.
Paul Ehrlich
D.
Burrill and Smith
Ans:
Felix d'Herelle and Frederick Twort
Explanation :
Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Felix d'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:.
Explanation :
The cell theory states that all living things are made of cells, cells are the basic units of structure and function of living things, and that all cells come from other cells. Since viruses are not made of cells, and do not use cells in any of their processes, they are not related to the cell theory.
[6] Which of the following is an example of conjugated protein?
A.
Albumin
B.
Globulin
C.
Glutelin
D.
Glycoprotein
Ans:
Glycoprotein
Explanation :
A conjugated protein is a protein that functions in interaction with other (non-polypeptide) chemical groups attached by covalent bonding or weak interactions.
[7] The exchange of gases takes place in the leaves through these pores for the purpose of photosynthesis. These pores are called -
A.
Guard Cells
B.
Stomata
C.
Chloroplast
D.
None of the above
Ans:
Stomata
Explanation :
Stomata are tiny pores present on the surface of the leaves via which exchange of gases takes place in the leaves for the purpose of photosynthesis. However, exchange of gases also occurs across the surface of stems, roots and leaves as well.
[8] Goitre is caused by the deficiency of _.
A.
Zinc
B.
Calcium
C.
Iodine
D.
Chlorine
Ans:
Iodine
Explanation :
Goitre is a swelling of the neck or larynx resulting from enlargement of the thyroid gland, associated with a thyroid gland that is not functioning properly. Worldwide, over 90% cases of goitre are caused by iodine deficiency. Prevention includes adding small amounts of iodine to table salt, a product known as iodized salt.
[9] Which part of brain is also known as "little brain"?
A.
Cerebrum
B.
Cerebellum
C.
Thalamus
D.
Hypothala mus
Ans:
Cerebellum
Explanation :
The cerebellum is known as little brain. It is a region of the brain that plays an important role in motor control. It may also be involved in some cognitive functions such as attention and language, and in regulating fear and pleasure responses, but its movement-related functions are the most solidly established.
[10] Which organism is responsible for alcohol fermentation?
A.
Chlorella
B.
Yeast
C.
Agaricus
D.
Puccinia
Ans:
Yeast
Explanation :
Ethanol fermentation, also called alcoholic fermentation, is a biological process which converts sugars such as glucose, fructose, and sucrose into cellular energy, producing ethanol and carbon dioxide as a side-effect. It is an anaerobic process since Yeasts perform this conversion in the absence of oxygen.
[11] Polio is caused by -
A.
Bacteria
B.
Virus
C.
Fungus
D.
Protozoa
Ans:
Virus
Explanation :
Poliomyelitis, often called polio or infantile paralysis, is an infectious disease caused by the poliovirus, Poliovirus is usually spread from person to person through infected fecal matter entering the mouth. It may also be spread by food or water containing human feces and less commonly from infected saliva.
[12] Copper is associated with mitochondria' enzymes.
A.
Cytochrome oxidase
B.
Succinic dehydrogenase
C.
Catalase
D.
Acid phosphatase
Ans:
Cytochrome oxidase
Explanation :
Copper is involved in normalized function of many enzymes, such as cytochrome oxidase, which is complex IV in mitochondrial electron transport chain, ceruloplasmin, Cu/Zn superoxide dismutase, and in amine oxidases. These enzymes catalyze reactions for oxidative phosphorylation, iron transportation, antioxidant and free radical scavenging and neutralization, and neurotransmitter synthesis, respectively.
[13] Metals can be at room temperature.
A.
Liquid only
B.
Solid only
C.
Solid or liquid
D.
Solid, liquid or gas
Ans:
Solid or liquid
Explanation :
All metals except Mercury are solid at room temperature. Mercury is the only metallic element that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions is bromine.
[14] BOD stands for :
A.
Biological oxidation demand
B.
Biological oxygen demand
C.
Biochemical oxygen demand
D.
Biotic oxidation demand
Ans:
Biochemical oxygen demand
Explanation :
BOD stands for Biochemical Oxygen Demand. It is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period. The BOD value is most commonly expressed in milligrams of oxygen consumed per litre of sample during 5 days of incubation at 20°C.
[15] Addition excessive amounts of heat to a lake is referred to as -
A.
Refrigeration effect
B.
Green House effect
C.
Thermal pollution
D.
Heat Bloom
Ans:
Thermal pollution
Explanation :
Thermal pollution is defined as the addition of excess of undesirable heat to water thereby making it harmful to man, animal or aquatic life. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. The change in ambient temperature of water decreases oxygen supply and affects ecosystem com-position.
[16] Mycotoxins are produced by -
A.
Bacteria
B.
Algae
C.
Viruses
D.
Fungi
Ans:
Fungi
Explanation :
Aflatoxin are naturally occurring mycotoxins that are produced by Aspergillus flavus and Aspergillus parasiticus, species of fungi. They have been associated with various diseases, such as aflatoxicosis, in livestock, domestic animals and humans throughout the world.
[17] Red rot of sugarcane is caused by -
A.
Alternaria alternata
B.
Phylophthora infestans
C.
Colletotrichum falcaturn
D.
Cercospora personata
Ans:
Colletotrichum falcaturn
Explanation :
Red rot disease is caused by the fungus Glomerella tucurnanensis. An older name, Colletotrichum falcatum, is still preferred by some pathologists. Red rot occurs in various parts of the cane plant but it is usually considered a stalk and a seed-piece disease. Its symptoms are highly variable depending upon the susceptibility of the sugarcane variety and the environment.
[18] The fleshy thalamus is edible in -
A.
Apple
B.
Tomato
C.
Orange
D.
Mango
Ans:
Apple
Explanation :
Apple is a pome, a simple, fleshy but false fruit as it is surrounded by a fleshy thalamus which is edible while actual fruit lies within other examples are pear, loquat, etc.
[19] The sense of balance is achieved by -
A.
Cerebrum equilibrium
B.
Thalamus equilibrium
C.
Cerebellum equilibrium
D.
Spinal cord equilibrium
Ans:
Cerebellum equilibrium
Explanation :
The cerebellum equilibrium controls the aspects of balance, equilibrium, and muscle tone, `which are factors that provide for smooth movement and activity. Electrical impulses from the cerebellum stimulate muscles that are responsible for voluntary movement, and it works in coordination with the motor cortices of the cerebrum for this overall function.
[20] Bacterial cells do not have -
A.
Cell wall
B.
Plasma membrane
C.
Ribosome
D.
Mitochondria
Ans:
Mitochondria
Explanation :
Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Bacteria are prokaiyotes, which, by definition, are cells that don't possess membrane-bound organelles. Mitochondria are membrane-bound organelles.
[21] A cellulosic wall is found in the cells of -
A.
animals
B.
bacteria
C.
fungi
D.
plants
Ans:
plants
Explanation :
Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes. It is a complex carbohydrate, that is composed of glucose units.
[22] The filtration unit of kidney is -
A.
axon
B.
nephron
C.
neuron
D.
yellow fiber
Ans:
nephron
Explanation :
Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
[23] The heart rate in an adult person is -
A.
50-60 times per minute
B.
70-80 times per hour
C.
70-80 times per second
D.
70-80 times per minute
Ans:
70-80 times per minute
Explanation :
Heart rate refers to the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute (bpm). The normal human heart rate ranges from 60-100 bpm; however 70-80 bpm is treated as the normal in adults.
[24] Which of the following is a tapeworm?
A.
Fasciola
B.
Schistosoma
C.
Taenia
D.
Enterobius
Ans:
Taenia
Explanation :
Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglotticis.
[25] Bacteriophage was discovered by -
A.
Felix d'Herelle and Frederick Twort
B.
Kluyver and Niel
C.
Paul Ehrlich
D.
Burrill and Smith
Ans:
Felix d'Herelle and Frederick Twort
Explanation :
Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Felix d'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:.
Explanation :
Stomata are tiny pores present on the surface of the leaves via which exchange of gases takes place in the leaves for the purpose of photosynthesis. However, exchange of gases also occurs across the surface of stems, roots and leaves as well.
[8] Goitre is caused by the deficiency of _.
A.
Zinc
B.
Calcium
C.
Iodine
D.
Chlorine
Ans:
Iodine
Explanation :
Goitre is a swelling of the neck or larynx resulting from enlargement of the thyroid gland, associated with a thyroid gland that is not functioning properly. Worldwide, over 90% cases of goitre are caused by iodine deficiency. Prevention includes adding small amounts of iodine to table salt, a product known as iodized salt.
[9] Which part of brain is also known as "little brain"?
A.
Cerebrum
B.
Cerebellum
C.
Thalamus
D.
Hypothala mus
Ans:
Cerebellum
Explanation :
The cerebellum is known as little brain. It is a region of the brain that plays an important role in motor control. It may also be involved in some cognitive functions such as attention and language, and in regulating fear and pleasure responses, but its movement-related functions are the most solidly established.
[10] Which organism is responsible for alcohol fermentation?
A.
Chlorella
B.
Yeast
C.
Agaricus
D.
Puccinia
Ans:
Yeast
Explanation :
Ethanol fermentation, also called alcoholic fermentation, is a biological process which converts sugars such as glucose, fructose, and sucrose into cellular energy, producing ethanol and carbon dioxide as a side-effect. It is an anaerobic process since Yeasts perform this conversion in the absence of oxygen.
[11] Polio is caused by -
A.
Bacteria
B.
Virus
C.
Fungus
D.
Protozoa
Ans:
Virus
Explanation :
Poliomyelitis, often called polio or infantile paralysis, is an infectious disease caused by the poliovirus, Poliovirus is usually spread from person to person through infected fecal matter entering the mouth. It may also be spread by food or water containing human feces and less commonly from infected saliva.
[12] Copper is associated with mitochondria' enzymes.
A.
Cytochrome oxidase
B.
Succinic dehydrogenase
C.
Catalase
D.
Acid phosphatase
Ans:
Cytochrome oxidase
Explanation :
Copper is involved in normalized function of many enzymes, such as cytochrome oxidase, which is complex IV in mitochondrial electron transport chain, ceruloplasmin, Cu/Zn superoxide dismutase, and in amine oxidases. These enzymes catalyze reactions for oxidative phosphorylation, iron transportation, antioxidant and free radical scavenging and neutralization, and neurotransmitter synthesis, respectively.
[13] Metals can be at room temperature.
A.
Liquid only
B.
Solid only
C.
Solid or liquid
D.
Solid, liquid or gas
Ans:
Solid or liquid
Explanation :
All metals except Mercury are solid at room temperature. Mercury is the only metallic element that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions is bromine.
[14] BOD stands for :
A.
Biological oxidation demand
B.
Biological oxygen demand
C.
Biochemical oxygen demand
D.
Biotic oxidation demand
Ans:
Biochemical oxygen demand
Explanation :
BOD stands for Biochemical Oxygen Demand. It is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period. The BOD value is most commonly expressed in milligrams of oxygen consumed per litre of sample during 5 days of incubation at 20°C.
[15] Addition excessive amounts of heat to a lake is referred to as -
A.
Refrigeration effect
B.
Green House effect
C.
Thermal pollution
D.
Heat Bloom
Ans:
Thermal pollution
Explanation :
Thermal pollution is defined as the addition of excess of undesirable heat to water thereby making it harmful to man, animal or aquatic life. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. The change in ambient temperature of water decreases oxygen supply and affects ecosystem com-position.
[16] Mycotoxins are produced by -
A.
Bacteria
B.
Algae
C.
Viruses
D.
Fungi
Ans:
Fungi
Explanation :
Aflatoxin are naturally occurring mycotoxins that are produced by Aspergillus flavus and Aspergillus parasiticus, species of fungi. They have been associated with various diseases, such as aflatoxicosis, in livestock, domestic animals and humans throughout the world.
[17] Red rot of sugarcane is caused by -
A.
Alternaria alternata
B.
Phylophthora infestans
C.
Colletotrichum falcaturn
D.
Cercospora personata
Ans:
Colletotrichum falcaturn
Explanation :
Red rot disease is caused by the fungus Glomerella tucurnanensis. An older name, Colletotrichum falcatum, is still preferred by some pathologists. Red rot occurs in various parts of the cane plant but it is usually considered a stalk and a seed-piece disease. Its symptoms are highly variable depending upon the susceptibility of the sugarcane variety and the environment.
[18] The fleshy thalamus is edible in -
A.
Apple
B.
Tomato
C.
Orange
D.
Mango
Ans:
Apple
Explanation :
Apple is a pome, a simple, fleshy but false fruit as it is surrounded by a fleshy thalamus which is edible while actual fruit lies within other examples are pear, loquat, etc.
[19] The sense of balance is achieved by -
A.
Cerebrum equilibrium
B.
Thalamus equilibrium
C.
Cerebellum equilibrium
D.
Spinal cord equilibrium
Ans:
Cerebellum equilibrium
Explanation :
The cerebellum equilibrium controls the aspects of balance, equilibrium, and muscle tone, `which are factors that provide for smooth movement and activity. Electrical impulses from the cerebellum stimulate muscles that are responsible for voluntary movement, and it works in coordination with the motor cortices of the cerebrum for this overall function.
[20] Bacterial cells do not have -
A.
Cell wall
B.
Plasma membrane
C.
Ribosome
D.
Mitochondria
Ans:
Mitochondria
Explanation :
Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Bacteria are prokaiyotes, which, by definition, are cells that don't possess membrane-bound organelles. Mitochondria are membrane-bound organelles.
[21] A cellulosic wall is found in the cells of -
A.
animals
B.
bacteria
C.
fungi
D.
plants
Ans:
plants
Explanation :
Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes. It is a complex carbohydrate, that is composed of glucose units.
[22] The filtration unit of kidney is -
A.
axon
B.
nephron
C.
neuron
D.
yellow fiber
Ans:
nephron
Explanation :
Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
[23] The heart rate in an adult person is -
A.
50-60 times per minute
B.
70-80 times per hour
C.
70-80 times per second
D.
70-80 times per minute
Ans:
70-80 times per minute
Explanation :
Heart rate refers to the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute (bpm). The normal human heart rate ranges from 60-100 bpm; however 70-80 bpm is treated as the normal in adults.
[24] Which of the following is a tapeworm?
A.
Fasciola
B.
Schistosoma
C.
Taenia
D.
Enterobius
Ans:
Taenia
Explanation :
Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglotticis.
[25] Bacteriophage was discovered by -
A.
Felix d'Herelle and Frederick Twort
B.
Kluyver and Niel
C.
Paul Ehrlich
D.
Burrill and Smith
Ans:
Felix d'Herelle and Frederick Twort
Explanation :
Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Felix d'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:.
Explanation :
The cerebellum is known as little brain. It is a region of the brain that plays an important role in motor control. It may also be involved in some cognitive functions such as attention and language, and in regulating fear and pleasure responses, but its movement-related functions are the most solidly established.
[10] Which organism is responsible for alcohol fermentation?
A.
Chlorella
B.
Yeast
C.
Agaricus
D.
Puccinia
Ans:
Yeast
Explanation :
Ethanol fermentation, also called alcoholic fermentation, is a biological process which converts sugars such as glucose, fructose, and sucrose into cellular energy, producing ethanol and carbon dioxide as a side-effect. It is an anaerobic process since Yeasts perform this conversion in the absence of oxygen.
[11] Polio is caused by -
A.
Bacteria
B.
Virus
C.
Fungus
D.
Protozoa
Ans:
Virus
Explanation :
Poliomyelitis, often called polio or infantile paralysis, is an infectious disease caused by the poliovirus, Poliovirus is usually spread from person to person through infected fecal matter entering the mouth. It may also be spread by food or water containing human feces and less commonly from infected saliva.
[12] Copper is associated with mitochondria' enzymes.
A.
Cytochrome oxidase
B.
Succinic dehydrogenase
C.
Catalase
D.
Acid phosphatase
Ans:
Cytochrome oxidase
Explanation :
Copper is involved in normalized function of many enzymes, such as cytochrome oxidase, which is complex IV in mitochondrial electron transport chain, ceruloplasmin, Cu/Zn superoxide dismutase, and in amine oxidases. These enzymes catalyze reactions for oxidative phosphorylation, iron transportation, antioxidant and free radical scavenging and neutralization, and neurotransmitter synthesis, respectively.
[13] Metals can be at room temperature.
A.
Liquid only
B.
Solid only
C.
Solid or liquid
D.
Solid, liquid or gas
Ans:
Solid or liquid
Explanation :
All metals except Mercury are solid at room temperature. Mercury is the only metallic element that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions is bromine.
[14] BOD stands for :
A.
Biological oxidation demand
B.
Biological oxygen demand
C.
Biochemical oxygen demand
D.
Biotic oxidation demand
Ans:
Biochemical oxygen demand
Explanation :
BOD stands for Biochemical Oxygen Demand. It is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period. The BOD value is most commonly expressed in milligrams of oxygen consumed per litre of sample during 5 days of incubation at 20°C.
[15] Addition excessive amounts of heat to a lake is referred to as -
A.
Refrigeration effect
B.
Green House effect
C.
Thermal pollution
D.
Heat Bloom
Ans:
Thermal pollution
Explanation :
Thermal pollution is defined as the addition of excess of undesirable heat to water thereby making it harmful to man, animal or aquatic life. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. The change in ambient temperature of water decreases oxygen supply and affects ecosystem com-position.
[16] Mycotoxins are produced by -
A.
Bacteria
B.
Algae
C.
Viruses
D.
Fungi
Ans:
Fungi
Explanation :
Aflatoxin are naturally occurring mycotoxins that are produced by Aspergillus flavus and Aspergillus parasiticus, species of fungi. They have been associated with various diseases, such as aflatoxicosis, in livestock, domestic animals and humans throughout the world.
[17] Red rot of sugarcane is caused by -
A.
Alternaria alternata
B.
Phylophthora infestans
C.
Colletotrichum falcaturn
D.
Cercospora personata
Ans:
Colletotrichum falcaturn
Explanation :
Red rot disease is caused by the fungus Glomerella tucurnanensis. An older name, Colletotrichum falcatum, is still preferred by some pathologists. Red rot occurs in various parts of the cane plant but it is usually considered a stalk and a seed-piece disease. Its symptoms are highly variable depending upon the susceptibility of the sugarcane variety and the environment.
[18] The fleshy thalamus is edible in -
A.
Apple
B.
Tomato
C.
Orange
D.
Mango
Ans:
Apple
Explanation :
Apple is a pome, a simple, fleshy but false fruit as it is surrounded by a fleshy thalamus which is edible while actual fruit lies within other examples are pear, loquat, etc.
[19] The sense of balance is achieved by -
A.
Cerebrum equilibrium
B.
Thalamus equilibrium
C.
Cerebellum equilibrium
D.
Spinal cord equilibrium
Ans:
Cerebellum equilibrium
Explanation :
The cerebellum equilibrium controls the aspects of balance, equilibrium, and muscle tone, `which are factors that provide for smooth movement and activity. Electrical impulses from the cerebellum stimulate muscles that are responsible for voluntary movement, and it works in coordination with the motor cortices of the cerebrum for this overall function.
[20] Bacterial cells do not have -
A.
Cell wall
B.
Plasma membrane
C.
Ribosome
D.
Mitochondria
Ans:
Mitochondria
Explanation :
Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Bacteria are prokaiyotes, which, by definition, are cells that don't possess membrane-bound organelles. Mitochondria are membrane-bound organelles.
[21] A cellulosic wall is found in the cells of -
A.
animals
B.
bacteria
C.
fungi
D.
plants
Ans:
plants
Explanation :
Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes. It is a complex carbohydrate, that is composed of glucose units.
[22] The filtration unit of kidney is -
A.
axon
B.
nephron
C.
neuron
D.
yellow fiber
Ans:
nephron
Explanation :
Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
[23] The heart rate in an adult person is -
A.
50-60 times per minute
B.
70-80 times per hour
C.
70-80 times per second
D.
70-80 times per minute
Ans:
70-80 times per minute
Explanation :
Heart rate refers to the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute (bpm). The normal human heart rate ranges from 60-100 bpm; however 70-80 bpm is treated as the normal in adults.
[24] Which of the following is a tapeworm?
A.
Fasciola
B.
Schistosoma
C.
Taenia
D.
Enterobius
Ans:
Taenia
Explanation :
Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglotticis.
[25] Bacteriophage was discovered by -
A.
Felix d'Herelle and Frederick Twort
B.
Kluyver and Niel
C.
Paul Ehrlich
D.
Burrill and Smith
Ans:
Felix d'Herelle and Frederick Twort
Explanation :
Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Felix d'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:.
Explanation :
Poliomyelitis, often called polio or infantile paralysis, is an infectious disease caused by the poliovirus, Poliovirus is usually spread from person to person through infected fecal matter entering the mouth. It may also be spread by food or water containing human feces and less commonly from infected saliva.
[12] Copper is associated with mitochondria' enzymes.
A.
Cytochrome oxidase
B.
Succinic dehydrogenase
C.
Catalase
D.
Acid phosphatase
Ans:
Cytochrome oxidase
Explanation :
Copper is involved in normalized function of many enzymes, such as cytochrome oxidase, which is complex IV in mitochondrial electron transport chain, ceruloplasmin, Cu/Zn superoxide dismutase, and in amine oxidases. These enzymes catalyze reactions for oxidative phosphorylation, iron transportation, antioxidant and free radical scavenging and neutralization, and neurotransmitter synthesis, respectively.
[13] Metals can be at room temperature.
A.
Liquid only
B.
Solid only
C.
Solid or liquid
D.
Solid, liquid or gas
Ans:
Solid or liquid
Explanation :
All metals except Mercury are solid at room temperature. Mercury is the only metallic element that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions is bromine.
[14] BOD stands for :
A.
Biological oxidation demand
B.
Biological oxygen demand
C.
Biochemical oxygen demand
D.
Biotic oxidation demand
Ans:
Biochemical oxygen demand
Explanation :
BOD stands for Biochemical Oxygen Demand. It is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period. The BOD value is most commonly expressed in milligrams of oxygen consumed per litre of sample during 5 days of incubation at 20°C.
[15] Addition excessive amounts of heat to a lake is referred to as -
A.
Refrigeration effect
B.
Green House effect
C.
Thermal pollution
D.
Heat Bloom
Ans:
Thermal pollution
Explanation :
Thermal pollution is defined as the addition of excess of undesirable heat to water thereby making it harmful to man, animal or aquatic life. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. The change in ambient temperature of water decreases oxygen supply and affects ecosystem com-position.
[16] Mycotoxins are produced by -
A.
Bacteria
B.
Algae
C.
Viruses
D.
Fungi
Ans:
Fungi
Explanation :
Aflatoxin are naturally occurring mycotoxins that are produced by Aspergillus flavus and Aspergillus parasiticus, species of fungi. They have been associated with various diseases, such as aflatoxicosis, in livestock, domestic animals and humans throughout the world.
[17] Red rot of sugarcane is caused by -
A.
Alternaria alternata
B.
Phylophthora infestans
C.
Colletotrichum falcaturn
D.
Cercospora personata
Ans:
Colletotrichum falcaturn
Explanation :
Red rot disease is caused by the fungus Glomerella tucurnanensis. An older name, Colletotrichum falcatum, is still preferred by some pathologists. Red rot occurs in various parts of the cane plant but it is usually considered a stalk and a seed-piece disease. Its symptoms are highly variable depending upon the susceptibility of the sugarcane variety and the environment.
[18] The fleshy thalamus is edible in -
A.
Apple
B.
Tomato
C.
Orange
D.
Mango
Ans:
Apple
Explanation :
Apple is a pome, a simple, fleshy but false fruit as it is surrounded by a fleshy thalamus which is edible while actual fruit lies within other examples are pear, loquat, etc.
[19] The sense of balance is achieved by -
A.
Cerebrum equilibrium
B.
Thalamus equilibrium
C.
Cerebellum equilibrium
D.
Spinal cord equilibrium
Ans:
Cerebellum equilibrium
Explanation :
The cerebellum equilibrium controls the aspects of balance, equilibrium, and muscle tone, `which are factors that provide for smooth movement and activity. Electrical impulses from the cerebellum stimulate muscles that are responsible for voluntary movement, and it works in coordination with the motor cortices of the cerebrum for this overall function.
[20] Bacterial cells do not have -
A.
Cell wall
B.
Plasma membrane
C.
Ribosome
D.
Mitochondria
Ans:
Mitochondria
Explanation :
Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Bacteria are prokaiyotes, which, by definition, are cells that don't possess membrane-bound organelles. Mitochondria are membrane-bound organelles.
[21] A cellulosic wall is found in the cells of -
A.
animals
B.
bacteria
C.
fungi
D.
plants
Ans:
plants
Explanation :
Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes. It is a complex carbohydrate, that is composed of glucose units.
[22] The filtration unit of kidney is -
A.
axon
B.
nephron
C.
neuron
D.
yellow fiber
Ans:
nephron
Explanation :
Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
[23] The heart rate in an adult person is -
A.
50-60 times per minute
B.
70-80 times per hour
C.
70-80 times per second
D.
70-80 times per minute
Ans:
70-80 times per minute
Explanation :
Heart rate refers to the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute (bpm). The normal human heart rate ranges from 60-100 bpm; however 70-80 bpm is treated as the normal in adults.
[24] Which of the following is a tapeworm?
A.
Fasciola
B.
Schistosoma
C.
Taenia
D.
Enterobius
Ans:
Taenia
Explanation :
Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglotticis.
[25] Bacteriophage was discovered by -
A.
Felix d'Herelle and Frederick Twort
B.
Kluyver and Niel
C.
Paul Ehrlich
D.
Burrill and Smith
Ans:
Felix d'Herelle and Frederick Twort
Explanation :
Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Felix d'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:.
Explanation :
All metals except Mercury are solid at room temperature. Mercury is the only metallic element that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions is bromine.
[14] BOD stands for :
A.
Biological oxidation demand
B.
Biological oxygen demand
C.
Biochemical oxygen demand
D.
Biotic oxidation demand
Ans:
Biochemical oxygen demand
Explanation :
BOD stands for Biochemical Oxygen Demand. It is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period. The BOD value is most commonly expressed in milligrams of oxygen consumed per litre of sample during 5 days of incubation at 20°C.
[15] Addition excessive amounts of heat to a lake is referred to as -
A.
Refrigeration effect
B.
Green House effect
C.
Thermal pollution
D.
Heat Bloom
Ans:
Thermal pollution
Explanation :
Thermal pollution is defined as the addition of excess of undesirable heat to water thereby making it harmful to man, animal or aquatic life. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. The change in ambient temperature of water decreases oxygen supply and affects ecosystem com-position.
[16] Mycotoxins are produced by -
A.
Bacteria
B.
Algae
C.
Viruses
D.
Fungi
Ans:
Fungi
Explanation :
Aflatoxin are naturally occurring mycotoxins that are produced by Aspergillus flavus and Aspergillus parasiticus, species of fungi. They have been associated with various diseases, such as aflatoxicosis, in livestock, domestic animals and humans throughout the world.
[17] Red rot of sugarcane is caused by -
A.
Alternaria alternata
B.
Phylophthora infestans
C.
Colletotrichum falcaturn
D.
Cercospora personata
Ans:
Colletotrichum falcaturn
Explanation :
Red rot disease is caused by the fungus Glomerella tucurnanensis. An older name, Colletotrichum falcatum, is still preferred by some pathologists. Red rot occurs in various parts of the cane plant but it is usually considered a stalk and a seed-piece disease. Its symptoms are highly variable depending upon the susceptibility of the sugarcane variety and the environment.
[18] The fleshy thalamus is edible in -
A.
Apple
B.
Tomato
C.
Orange
D.
Mango
Ans:
Apple
Explanation :
Apple is a pome, a simple, fleshy but false fruit as it is surrounded by a fleshy thalamus which is edible while actual fruit lies within other examples are pear, loquat, etc.
[19] The sense of balance is achieved by -
A.
Cerebrum equilibrium
B.
Thalamus equilibrium
C.
Cerebellum equilibrium
D.
Spinal cord equilibrium
Ans:
Cerebellum equilibrium
Explanation :
The cerebellum equilibrium controls the aspects of balance, equilibrium, and muscle tone, `which are factors that provide for smooth movement and activity. Electrical impulses from the cerebellum stimulate muscles that are responsible for voluntary movement, and it works in coordination with the motor cortices of the cerebrum for this overall function.
[20] Bacterial cells do not have -
A.
Cell wall
B.
Plasma membrane
C.
Ribosome
D.
Mitochondria
Ans:
Mitochondria
Explanation :
Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Bacteria are prokaiyotes, which, by definition, are cells that don't possess membrane-bound organelles. Mitochondria are membrane-bound organelles.
[21] A cellulosic wall is found in the cells of -
A.
animals
B.
bacteria
C.
fungi
D.
plants
Ans:
plants
Explanation :
Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes. It is a complex carbohydrate, that is composed of glucose units.
[22] The filtration unit of kidney is -
A.
axon
B.
nephron
C.
neuron
D.
yellow fiber
Ans:
nephron
Explanation :
Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
[23] The heart rate in an adult person is -
A.
50-60 times per minute
B.
70-80 times per hour
C.
70-80 times per second
D.
70-80 times per minute
Ans:
70-80 times per minute
Explanation :
Heart rate refers to the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute (bpm). The normal human heart rate ranges from 60-100 bpm; however 70-80 bpm is treated as the normal in adults.
[24] Which of the following is a tapeworm?
A.
Fasciola
B.
Schistosoma
C.
Taenia
D.
Enterobius
Ans:
Taenia
Explanation :
Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglotticis.
[25] Bacteriophage was discovered by -
A.
Felix d'Herelle and Frederick Twort
B.
Kluyver and Niel
C.
Paul Ehrlich
D.
Burrill and Smith
Ans:
Felix d'Herelle and Frederick Twort
Explanation :
Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Felix d'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:.
Explanation :
Thermal pollution is defined as the addition of excess of undesirable heat to water thereby making it harmful to man, animal or aquatic life. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. The change in ambient temperature of water decreases oxygen supply and affects ecosystem com-position.
[16] Mycotoxins are produced by -
A.
Bacteria
B.
Algae
C.
Viruses
D.
Fungi
Ans:
Fungi
Explanation :
Aflatoxin are naturally occurring mycotoxins that are produced by Aspergillus flavus and Aspergillus parasiticus, species of fungi. They have been associated with various diseases, such as aflatoxicosis, in livestock, domestic animals and humans throughout the world.
[17] Red rot of sugarcane is caused by -
A.
Alternaria alternata
B.
Phylophthora infestans
C.
Colletotrichum falcaturn
D.
Cercospora personata
Ans:
Colletotrichum falcaturn
Explanation :
Red rot disease is caused by the fungus Glomerella tucurnanensis. An older name, Colletotrichum falcatum, is still preferred by some pathologists. Red rot occurs in various parts of the cane plant but it is usually considered a stalk and a seed-piece disease. Its symptoms are highly variable depending upon the susceptibility of the sugarcane variety and the environment.
[18] The fleshy thalamus is edible in -
A.
Apple
B.
Tomato
C.
Orange
D.
Mango
Ans:
Apple
Explanation :
Apple is a pome, a simple, fleshy but false fruit as it is surrounded by a fleshy thalamus which is edible while actual fruit lies within other examples are pear, loquat, etc.
[19] The sense of balance is achieved by -
A.
Cerebrum equilibrium
B.
Thalamus equilibrium
C.
Cerebellum equilibrium
D.
Spinal cord equilibrium
Ans:
Cerebellum equilibrium
Explanation :
The cerebellum equilibrium controls the aspects of balance, equilibrium, and muscle tone, `which are factors that provide for smooth movement and activity. Electrical impulses from the cerebellum stimulate muscles that are responsible for voluntary movement, and it works in coordination with the motor cortices of the cerebrum for this overall function.
[20] Bacterial cells do not have -
A.
Cell wall
B.
Plasma membrane
C.
Ribosome
D.
Mitochondria
Ans:
Mitochondria
Explanation :
Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Bacteria are prokaiyotes, which, by definition, are cells that don't possess membrane-bound organelles. Mitochondria are membrane-bound organelles.
[21] A cellulosic wall is found in the cells of -
A.
animals
B.
bacteria
C.
fungi
D.
plants
Ans:
plants
Explanation :
Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes. It is a complex carbohydrate, that is composed of glucose units.
[22] The filtration unit of kidney is -
A.
axon
B.
nephron
C.
neuron
D.
yellow fiber
Ans:
nephron
Explanation :
Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
[23] The heart rate in an adult person is -
A.
50-60 times per minute
B.
70-80 times per hour
C.
70-80 times per second
D.
70-80 times per minute
Ans:
70-80 times per minute
Explanation :
Heart rate refers to the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute (bpm). The normal human heart rate ranges from 60-100 bpm; however 70-80 bpm is treated as the normal in adults.
[24] Which of the following is a tapeworm?
A.
Fasciola
B.
Schistosoma
C.
Taenia
D.
Enterobius
Ans:
Taenia
Explanation :
Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglotticis.
[25] Bacteriophage was discovered by -
A.
Felix d'Herelle and Frederick Twort
B.
Kluyver and Niel
C.
Paul Ehrlich
D.
Burrill and Smith
Ans:
Felix d'Herelle and Frederick Twort
Explanation :
Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Felix d'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:.
Explanation :
Red rot disease is caused by the fungus Glomerella tucurnanensis. An older name, Colletotrichum falcatum, is still preferred by some pathologists. Red rot occurs in various parts of the cane plant but it is usually considered a stalk and a seed-piece disease. Its symptoms are highly variable depending upon the susceptibility of the sugarcane variety and the environment.
[18] The fleshy thalamus is edible in -
A.
Apple
B.
Tomato
C.
Orange
D.
Mango
Ans:
Apple
Explanation :
Apple is a pome, a simple, fleshy but false fruit as it is surrounded by a fleshy thalamus which is edible while actual fruit lies within other examples are pear, loquat, etc.
[19] The sense of balance is achieved by -
A.
Cerebrum equilibrium
B.
Thalamus equilibrium
C.
Cerebellum equilibrium
D.
Spinal cord equilibrium
Ans:
Cerebellum equilibrium
Explanation :
The cerebellum equilibrium controls the aspects of balance, equilibrium, and muscle tone, `which are factors that provide for smooth movement and activity. Electrical impulses from the cerebellum stimulate muscles that are responsible for voluntary movement, and it works in coordination with the motor cortices of the cerebrum for this overall function.
[20] Bacterial cells do not have -
A.
Cell wall
B.
Plasma membrane
C.
Ribosome
D.
Mitochondria
Ans:
Mitochondria
Explanation :
Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Bacteria are prokaiyotes, which, by definition, are cells that don't possess membrane-bound organelles. Mitochondria are membrane-bound organelles.
[21] A cellulosic wall is found in the cells of -
A.
animals
B.
bacteria
C.
fungi
D.
plants
Ans:
plants
Explanation :
Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes. It is a complex carbohydrate, that is composed of glucose units.
[22] The filtration unit of kidney is -
A.
axon
B.
nephron
C.
neuron
D.
yellow fiber
Ans:
nephron
Explanation :
Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
[23] The heart rate in an adult person is -
A.
50-60 times per minute
B.
70-80 times per hour
C.
70-80 times per second
D.
70-80 times per minute
Ans:
70-80 times per minute
Explanation :
Heart rate refers to the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute (bpm). The normal human heart rate ranges from 60-100 bpm; however 70-80 bpm is treated as the normal in adults.
[24] Which of the following is a tapeworm?
A.
Fasciola
B.
Schistosoma
C.
Taenia
D.
Enterobius
Ans:
Taenia
Explanation :
Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglotticis.
[25] Bacteriophage was discovered by -
A.
Felix d'Herelle and Frederick Twort
B.
Kluyver and Niel
C.
Paul Ehrlich
D.
Burrill and Smith
Ans:
Felix d'Herelle and Frederick Twort
Explanation :
Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Felix d'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:.
Explanation :
The cerebellum equilibrium controls the aspects of balance, equilibrium, and muscle tone, `which are factors that provide for smooth movement and activity. Electrical impulses from the cerebellum stimulate muscles that are responsible for voluntary movement, and it works in coordination with the motor cortices of the cerebrum for this overall function.
[20] Bacterial cells do not have -
A.
Cell wall
B.
Plasma membrane
C.
Ribosome
D.
Mitochondria
Ans:
Mitochondria
Explanation :
Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Bacteria are prokaiyotes, which, by definition, are cells that don't possess membrane-bound organelles. Mitochondria are membrane-bound organelles.
[21] A cellulosic wall is found in the cells of -
A.
animals
B.
bacteria
C.
fungi
D.
plants
Ans:
plants
Explanation :
Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes. It is a complex carbohydrate, that is composed of glucose units.
[22] The filtration unit of kidney is -
A.
axon
B.
nephron
C.
neuron
D.
yellow fiber
Ans:
nephron
Explanation :
Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
[23] The heart rate in an adult person is -
A.
50-60 times per minute
B.
70-80 times per hour
C.
70-80 times per second
D.
70-80 times per minute
Ans:
70-80 times per minute
Explanation :
Heart rate refers to the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute (bpm). The normal human heart rate ranges from 60-100 bpm; however 70-80 bpm is treated as the normal in adults.
[24] Which of the following is a tapeworm?
A.
Fasciola
B.
Schistosoma
C.
Taenia
D.
Enterobius
Ans:
Taenia
Explanation :
Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglotticis.
[25] Bacteriophage was discovered by -
A.
Felix d'Herelle and Frederick Twort
B.
Kluyver and Niel
C.
Paul Ehrlich
D.
Burrill and Smith
Ans:
Felix d'Herelle and Frederick Twort
Explanation :
Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Felix d'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:.
Explanation :
Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes. It is a complex carbohydrate, that is composed of glucose units.
[22] The filtration unit of kidney is -
A.
axon
B.
nephron
C.
neuron
D.
yellow fiber
Ans:
nephron
Explanation :
Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
[23] The heart rate in an adult person is -
A.
50-60 times per minute
B.
70-80 times per hour
C.
70-80 times per second
D.
70-80 times per minute
Ans:
70-80 times per minute
Explanation :
Heart rate refers to the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute (bpm). The normal human heart rate ranges from 60-100 bpm; however 70-80 bpm is treated as the normal in adults.
[24] Which of the following is a tapeworm?
A.
Fasciola
B.
Schistosoma
C.
Taenia
D.
Enterobius
Ans:
Taenia
Explanation :
Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglotticis.
[25] Bacteriophage was discovered by -
A.
Felix d'Herelle and Frederick Twort
B.
Kluyver and Niel
C.
Paul Ehrlich
D.
Burrill and Smith
Ans:
Felix d'Herelle and Frederick Twort
Explanation :
Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Felix d'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:.
Explanation :
Heart rate refers to the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute (bpm). The normal human heart rate ranges from 60-100 bpm; however 70-80 bpm is treated as the normal in adults.
[24] Which of the following is a tapeworm?
A.
Fasciola
B.
Schistosoma
C.
Taenia
D.
Enterobius
Ans:
Taenia
Explanation :
Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglotticis.
[25] Bacteriophage was discovered by -
A.
Felix d'Herelle and Frederick Twort
B.
Kluyver and Niel
C.
Paul Ehrlich
D.
Burrill and Smith
Ans:
Felix d'Herelle and Frederick Twort
Explanation :
Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Felix d'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:.
Explanation :
Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Felix d'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:.