[1] A universal recipient has the blood group -
A.
B
B.
AB
C.
A
D.
O
Ans:
AB
Explanation :
Individuals with type O blood are often called universal donors, and those with type AB blood are called universal recipients. Blood group O Individuals do not have either A or B antigens on the surface of their RBCs, and their blood serum contains IGM anti-A and anti-B antibodies. Therefore, a group O individual can receive blood only from a group O individual, but can donate blood to individuals of any ABO blood group (Le., A, B, O or AB).
[2] Symbiotic Bacteria responsible for the fixation of atmospheric nitrogen are present in -
A.
peas
B.
wheat
C.
corn
D.
oats
Ans:
peas
Explanation :
Nitrogen-fixing bacteria are microorganisms capable of transforming atmospheric nitrogen into fixed. nitrogen. Rhizobium is one such bacteria that is associated with leguminous plants (e.g., various members of the pea family). It invades the root hairs of host plants and convert free nitrogen to ammonia, which the host plant utilizes for its development.
[3] If xylem and phloem are arranged in the same radius, such a vascular bundle is called :
A.
collateral
B.
bicollateral
C.
concentric
D.
radial
Ans:
collateral
Explanation :
In the collateral type of vascular bundle, xylem and phloem are arranged side by side on the same radius. This may be either open or closed. Usually xylem is seen towards the inner side and phloem towards outer side. The collateral vascular bundle is also known as conjoint.
[4] Amino acids are required for the synthesis of -
A.
Alkaloids
B.
Lipids
C.
Proteins
D.
Carbohydrates
Ans:
Proteins
Explanation :
Amino acids are required for the synthesis of body protein and other important nitrogen-containing com-pounds. Amino acids are constituents of protein and act as precursors for many coenzymes, hormones, nucleic acid, etc. Adult humans are unable to synthesize all twenty amino acids needed for protein synthesis; those which cannot be synthesized and which must then be acquired via the diet are referred to as essential.
[5] The substrate of Photorespiration is -
A.
Fructose
B.
Pyruvic acid
C.
Glycolate
D.
Glucose
Ans:
Glycolate
Explanation :
Photorespiration is a special type of respiration shown by many green plants when they are exposed to light. Glycolate (glycolic acid) is the chief metabolite of photorespiration and also its substrate. Other important metabolites are the amino acids glycine and serine.
[6] B-Diversity is also known as -
A.
Within habitat diversity
B.
Ecosystem diversity
C.
Global diversity
D.
Between habitat diversity
Ans:
Ecosystem diversity
Explanation :
Biodiversity includes three main types: diversity within species (genetic diversity), between species (species diversity) and between ecosystems (ecosystem diversity). Ecological diversity is the intricate network of different species present in local ecosystems and the dynamic interplay between them.
[7] Interferons are synthesized in response to -
A.
Bacteria
B.
Fungi
C.
Myroplasma
D.
Virus
Ans:
Virus
Explanation :
Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, parasites, or tumor cells. Interferon synthesis occurs primarily in response to viral single-stranded or double stranded RNA that are either the genetic material of RNA viruses or a product of viral transcription. Interferons are named for their ability to interfere with viral replication by protecting cells from virus infections.
[8] The resources which are obtained from biosphere and have life are -
A.
Potential resources
B.
Biotic resources
C.
Abiotic resources
D.
Renewable resources
Ans:
Biotic resources
Explanation :
Biotic resources describe living or once living resources of a community; for example organisms, such as plants and animals. They are obtained from the biosphere and have life. The resources which are composed of non-living things are called Abiotic Resources. For example, water, minerals, metals, wind, solar energy etc.
[9] Myrtecaine is study of -
A.
Insects
B.
Ants
C.
Crustaceans
D.
Arthropods
Ans:
Ants
Explanation :
Myrmecology is the scientific study of ants, a branch of entomology. The word myrtecology was coined by William Morton Wheeler (1865-1937), although human interest in the life of ants goes back further, with numerous ancient folk references.
[10] HIV often changes its shape due to the presence of an enzyme called -
A.
Reverse Transcriptase
B.
Enterokinase
C.
Nucleotidase
D.
Nucleoditase
Ans:
Reverse Transcriptase
Explanation :
Use of the reverse transcriptase enzyme is a unique characteristic of retroviruses such as HIV. After the virus releases its genetic material into a host cell, reverse transcriptase converts the viral RNA into a complementary piece of DNA. This process is known as 'reverse transcription'.
[11] The largest White Blood Corpuscle is -
A.
Lymphocyte
B.
Monocyte
C.
Thrombocyte
D.
Erythrocyte
Ans:
Monocyte
Explanation :
Monocytes are the largest white blood cell. When they leave the blood they’re called macrophages. Macrophages work with lymphocytes as antigen presenting cells.
[12] Root Hairs arise from -
A.
Cortex
B.
Pericycle
C.
Epidermis
D.
Endodermis
Ans:
Epidermis
Explanation :
Root hairs are tubular-shaped tip-growing cells that arise from epidermal cells known as trichoblasts, behind the tips of young roots. Like all tip-growing cells, root hairs grow by the addition of cell wall precursors to the tip delivered by vesicles from the endomembrane system.
[13] Vermicomposting is done by -
A.
Fungus
B.
Bacteria
C.
Worms
D.
Animals
Ans:
Worms
Explanation :
Vermicomposting is the process of using worms and micro-organisms to turn kitchen waste into black, earthy-smelling, nutrient-rich humus. Vermicompost is an excellent, nutrient-rich organic fertilizer and soil conditioner.
[14] 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.
[15] A cell increases in volume when it is placed in -
A.
Hypertonic solution
B.
Hypotonic solution
C.
Isotonic solution
D.
None of these
Ans:
Hypotonic solution
Explanation :
When a cell is placed in a hypotonic solution, water rushes into the membrane, increasing the cell's volume. Eventually, the cell's membrane is enlarged such that it pushes against the cell's rigid wall. At this point the cell is said to be turgid.
[16] Five Kingdom classification was given by -
A.
Whittaker
B.
Haeckel
C.
Linneus
D.
Copeland
Ans:
Whittaker
Explanation :
Robert Harding Whittaker was a distinguished American plant ecologist who was the first to propose the five-kingdom taxonomic classification of the world’s biota into the Animalia, Plantae, Fungi, Protista, and Monera in 1969. He also proposed the Whittaker Biome Classification, which categorized biome- types upon two abiotic factors: temperature and precipitation.
[17] Animals with Chitinous exoskeleton are -
A.
Insects
B.
Sponges
C.
Sea-Urchin
D.
Snails
Ans:
Insects
Explanation :
Chitin is the main component of the cell walls of fungi, the exoskeletons of arthropods such as crustaceans (e.g., crabs, lobsters and shrimps) and insects, the radulas of mollusks, and the beaks and internal shells of cephalopods, including squid and octopuses. Combined with calcium carbonate, as in the shells of Crustacean and mollusks, chitin produces a much stronger composite.
[18] The casual organism of Polio is -
A.
A fungi
B.
A virus
C.
A worm
D.
A bacteria
Ans:
A virus
Explanation :
Polio is a highly infectious disease caused by a virus. Its causative agent, poliovirus, was identified in 1908 by Karl Landsteiner. The polio virus invades the nervous system, and can cause total paralysis in a matter of hours.
[19] Panda belongs to the same family as that -
A.
Kangaroo
B.
Porcupine
C.
Whale
D.
Bear
Ans:
Bear
Explanation :
It is generally considered that the Panda belongs to the bear family, though differences persist. Some DNA studies have shown that the giant panda is closer to the bear family while the red panda is indeed closer to the raccoon family.
[20] What is the average 'Intelligence Quotient (IQ) of normal' persons?
A.
100 to 120
B.
90 to 110
C.
70 to 130
D.
50 to 100
Ans:
90 to 110
Explanation :
IQ is a number meant to measure people cognitive abilities (intelligence) in relation to their age group. An LQ between 90 and 110 is considered average; over 120, superior.
[21] A Parenchyma cell which stores ergastic substance is known as -
A.
Phragmoblast
B.
Idioblast
C.
Conidioplast
D.
Chloroplast
Ans:
Idioblast
Explanation :
Parenchyma cells containing ergastic substances are called idioblasts. Tannin cells, cells filled with raphides, etc. constitute idioblast. An idioblast is an isolated plant cell that differs from neighboring tissues. It carries out storage of reserves.
[22] Green manure is obtained from -
A.
Domestic vegetable waste
B.
Oil seed husk cakes
C.
Fresh animal excreta
D.
Decomposing green legume plants
Ans:
Decomposing green legume plants
Explanation :
Green undecomposed material used as manure is called green manure. It is obtained in two ways: (1) growing green manure crops usually belonging to leguminous family and incorporating into the soil after sufficient growth or (2) by collecting green leaf from plants grown in wastelands, field bonds and forest. The most important green manure crops are sunnhemp, dhaincha,. etc.
[23] Movement of hairs in Drosera is referred to as -
A.
Heliotropism
B.
Thigmotropism
C.
Photonastic
D.
Seismonastic
Ans:
Thigmotropism
Explanation :
Thigmonasty (thigmotropism) refers to plant movement in response to touch or physical contact without regard to the direction of the stimulus. Thigmonastic movements are exemplified by the closing of the insect-eating plant Venus’s flytrap (Dionaea muscipula) and the bending of the glandular hairs of sundew (Drosera sp.) as a result of contact with an insect.
[24] Milk of magnesia is a suspension of –
A.
magnesium sulphate
B.
magnesium carbonate
C.
magnesium hydroxide
D.
magnesium Chloride
Ans:
magnesium hydroxide
Explanation :
Magnesium hydroxide is an inorganic compound with the chemical formula Mg (OH)2. As a suspension in water, it is often called milk of magnesia because of its milk-like appearance. The solid mineral form of magnesium hydroxide is known as brucite. Magnesium hydroxide is a common component of antacids and laxatives; it interferes with the absorption of folic acid and iron. Magnesium hydroxide has low solubility in water, with a Ksp of 1.5×10–11; however all of the magnesium hydroxide that does dissolve dissociates.
[25] The histogen, from which epidermis is formed, is -
A.
Dermatogen
B.
Perlblern
C.
Plerome
D.
Calyptrogen
Ans:
Dermatogen
Explanation :
There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermatogen is the outermost layers, the cells of which divide anticlinally and give rise to the epidermis. Periblem and Plerome are the other two histogen.
Explanation :
Individuals with type O blood are often called universal donors, and those with type AB blood are called universal recipients. Blood group O Individuals do not have either A or B antigens on the surface of their RBCs, and their blood serum contains IGM anti-A and anti-B antibodies. Therefore, a group O individual can receive blood only from a group O individual, but can donate blood to individuals of any ABO blood group (Le., A, B, O or AB).
[2] Symbiotic Bacteria responsible for the fixation of atmospheric nitrogen are present in -
A.
peas
B.
wheat
C.
corn
D.
oats
Ans:
peas
Explanation :
Nitrogen-fixing bacteria are microorganisms capable of transforming atmospheric nitrogen into fixed. nitrogen. Rhizobium is one such bacteria that is associated with leguminous plants (e.g., various members of the pea family). It invades the root hairs of host plants and convert free nitrogen to ammonia, which the host plant utilizes for its development.
[3] If xylem and phloem are arranged in the same radius, such a vascular bundle is called :
A.
collateral
B.
bicollateral
C.
concentric
D.
radial
Ans:
collateral
Explanation :
In the collateral type of vascular bundle, xylem and phloem are arranged side by side on the same radius. This may be either open or closed. Usually xylem is seen towards the inner side and phloem towards outer side. The collateral vascular bundle is also known as conjoint.
[4] Amino acids are required for the synthesis of -
A.
Alkaloids
B.
Lipids
C.
Proteins
D.
Carbohydrates
Ans:
Proteins
Explanation :
Amino acids are required for the synthesis of body protein and other important nitrogen-containing com-pounds. Amino acids are constituents of protein and act as precursors for many coenzymes, hormones, nucleic acid, etc. Adult humans are unable to synthesize all twenty amino acids needed for protein synthesis; those which cannot be synthesized and which must then be acquired via the diet are referred to as essential.
[5] The substrate of Photorespiration is -
A.
Fructose
B.
Pyruvic acid
C.
Glycolate
D.
Glucose
Ans:
Glycolate
Explanation :
Photorespiration is a special type of respiration shown by many green plants when they are exposed to light. Glycolate (glycolic acid) is the chief metabolite of photorespiration and also its substrate. Other important metabolites are the amino acids glycine and serine.
[6] B-Diversity is also known as -
A.
Within habitat diversity
B.
Ecosystem diversity
C.
Global diversity
D.
Between habitat diversity
Ans:
Ecosystem diversity
Explanation :
Biodiversity includes three main types: diversity within species (genetic diversity), between species (species diversity) and between ecosystems (ecosystem diversity). Ecological diversity is the intricate network of different species present in local ecosystems and the dynamic interplay between them.
[7] Interferons are synthesized in response to -
A.
Bacteria
B.
Fungi
C.
Myroplasma
D.
Virus
Ans:
Virus
Explanation :
Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, parasites, or tumor cells. Interferon synthesis occurs primarily in response to viral single-stranded or double stranded RNA that are either the genetic material of RNA viruses or a product of viral transcription. Interferons are named for their ability to interfere with viral replication by protecting cells from virus infections.
[8] The resources which are obtained from biosphere and have life are -
A.
Potential resources
B.
Biotic resources
C.
Abiotic resources
D.
Renewable resources
Ans:
Biotic resources
Explanation :
Biotic resources describe living or once living resources of a community; for example organisms, such as plants and animals. They are obtained from the biosphere and have life. The resources which are composed of non-living things are called Abiotic Resources. For example, water, minerals, metals, wind, solar energy etc.
[9] Myrtecaine is study of -
A.
Insects
B.
Ants
C.
Crustaceans
D.
Arthropods
Ans:
Ants
Explanation :
Myrmecology is the scientific study of ants, a branch of entomology. The word myrtecology was coined by William Morton Wheeler (1865-1937), although human interest in the life of ants goes back further, with numerous ancient folk references.
[10] HIV often changes its shape due to the presence of an enzyme called -
A.
Reverse Transcriptase
B.
Enterokinase
C.
Nucleotidase
D.
Nucleoditase
Ans:
Reverse Transcriptase
Explanation :
Use of the reverse transcriptase enzyme is a unique characteristic of retroviruses such as HIV. After the virus releases its genetic material into a host cell, reverse transcriptase converts the viral RNA into a complementary piece of DNA. This process is known as 'reverse transcription'.
[11] The largest White Blood Corpuscle is -
A.
Lymphocyte
B.
Monocyte
C.
Thrombocyte
D.
Erythrocyte
Ans:
Monocyte
Explanation :
Monocytes are the largest white blood cell. When they leave the blood they’re called macrophages. Macrophages work with lymphocytes as antigen presenting cells.
[12] Root Hairs arise from -
A.
Cortex
B.
Pericycle
C.
Epidermis
D.
Endodermis
Ans:
Epidermis
Explanation :
Root hairs are tubular-shaped tip-growing cells that arise from epidermal cells known as trichoblasts, behind the tips of young roots. Like all tip-growing cells, root hairs grow by the addition of cell wall precursors to the tip delivered by vesicles from the endomembrane system.
[13] Vermicomposting is done by -
A.
Fungus
B.
Bacteria
C.
Worms
D.
Animals
Ans:
Worms
Explanation :
Vermicomposting is the process of using worms and micro-organisms to turn kitchen waste into black, earthy-smelling, nutrient-rich humus. Vermicompost is an excellent, nutrient-rich organic fertilizer and soil conditioner.
[14] 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.
[15] A cell increases in volume when it is placed in -
A.
Hypertonic solution
B.
Hypotonic solution
C.
Isotonic solution
D.
None of these
Ans:
Hypotonic solution
Explanation :
When a cell is placed in a hypotonic solution, water rushes into the membrane, increasing the cell's volume. Eventually, the cell's membrane is enlarged such that it pushes against the cell's rigid wall. At this point the cell is said to be turgid.
[16] Five Kingdom classification was given by -
A.
Whittaker
B.
Haeckel
C.
Linneus
D.
Copeland
Ans:
Whittaker
Explanation :
Robert Harding Whittaker was a distinguished American plant ecologist who was the first to propose the five-kingdom taxonomic classification of the world’s biota into the Animalia, Plantae, Fungi, Protista, and Monera in 1969. He also proposed the Whittaker Biome Classification, which categorized biome- types upon two abiotic factors: temperature and precipitation.
[17] Animals with Chitinous exoskeleton are -
A.
Insects
B.
Sponges
C.
Sea-Urchin
D.
Snails
Ans:
Insects
Explanation :
Chitin is the main component of the cell walls of fungi, the exoskeletons of arthropods such as crustaceans (e.g., crabs, lobsters and shrimps) and insects, the radulas of mollusks, and the beaks and internal shells of cephalopods, including squid and octopuses. Combined with calcium carbonate, as in the shells of Crustacean and mollusks, chitin produces a much stronger composite.
[18] The casual organism of Polio is -
A.
A fungi
B.
A virus
C.
A worm
D.
A bacteria
Ans:
A virus
Explanation :
Polio is a highly infectious disease caused by a virus. Its causative agent, poliovirus, was identified in 1908 by Karl Landsteiner. The polio virus invades the nervous system, and can cause total paralysis in a matter of hours.
[19] Panda belongs to the same family as that -
A.
Kangaroo
B.
Porcupine
C.
Whale
D.
Bear
Ans:
Bear
Explanation :
It is generally considered that the Panda belongs to the bear family, though differences persist. Some DNA studies have shown that the giant panda is closer to the bear family while the red panda is indeed closer to the raccoon family.
[20] What is the average 'Intelligence Quotient (IQ) of normal' persons?
A.
100 to 120
B.
90 to 110
C.
70 to 130
D.
50 to 100
Ans:
90 to 110
Explanation :
IQ is a number meant to measure people cognitive abilities (intelligence) in relation to their age group. An LQ between 90 and 110 is considered average; over 120, superior.
[21] A Parenchyma cell which stores ergastic substance is known as -
A.
Phragmoblast
B.
Idioblast
C.
Conidioplast
D.
Chloroplast
Ans:
Idioblast
Explanation :
Parenchyma cells containing ergastic substances are called idioblasts. Tannin cells, cells filled with raphides, etc. constitute idioblast. An idioblast is an isolated plant cell that differs from neighboring tissues. It carries out storage of reserves.
[22] Green manure is obtained from -
A.
Domestic vegetable waste
B.
Oil seed husk cakes
C.
Fresh animal excreta
D.
Decomposing green legume plants
Ans:
Decomposing green legume plants
Explanation :
Green undecomposed material used as manure is called green manure. It is obtained in two ways: (1) growing green manure crops usually belonging to leguminous family and incorporating into the soil after sufficient growth or (2) by collecting green leaf from plants grown in wastelands, field bonds and forest. The most important green manure crops are sunnhemp, dhaincha,. etc.
[23] Movement of hairs in Drosera is referred to as -
A.
Heliotropism
B.
Thigmotropism
C.
Photonastic
D.
Seismonastic
Ans:
Thigmotropism
Explanation :
Thigmonasty (thigmotropism) refers to plant movement in response to touch or physical contact without regard to the direction of the stimulus. Thigmonastic movements are exemplified by the closing of the insect-eating plant Venus’s flytrap (Dionaea muscipula) and the bending of the glandular hairs of sundew (Drosera sp.) as a result of contact with an insect.
[24] Milk of magnesia is a suspension of –
A.
magnesium sulphate
B.
magnesium carbonate
C.
magnesium hydroxide
D.
magnesium Chloride
Ans:
magnesium hydroxide
Explanation :
Magnesium hydroxide is an inorganic compound with the chemical formula Mg (OH)2. As a suspension in water, it is often called milk of magnesia because of its milk-like appearance. The solid mineral form of magnesium hydroxide is known as brucite. Magnesium hydroxide is a common component of antacids and laxatives; it interferes with the absorption of folic acid and iron. Magnesium hydroxide has low solubility in water, with a Ksp of 1.5×10–11; however all of the magnesium hydroxide that does dissolve dissociates.
[25] The histogen, from which epidermis is formed, is -
A.
Dermatogen
B.
Perlblern
C.
Plerome
D.
Calyptrogen
Ans:
Dermatogen
Explanation :
There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermatogen is the outermost layers, the cells of which divide anticlinally and give rise to the epidermis. Periblem and Plerome are the other two histogen.
Explanation :
In the collateral type of vascular bundle, xylem and phloem are arranged side by side on the same radius. This may be either open or closed. Usually xylem is seen towards the inner side and phloem towards outer side. The collateral vascular bundle is also known as conjoint.
[4] Amino acids are required for the synthesis of -
A.
Alkaloids
B.
Lipids
C.
Proteins
D.
Carbohydrates
Ans:
Proteins
Explanation :
Amino acids are required for the synthesis of body protein and other important nitrogen-containing com-pounds. Amino acids are constituents of protein and act as precursors for many coenzymes, hormones, nucleic acid, etc. Adult humans are unable to synthesize all twenty amino acids needed for protein synthesis; those which cannot be synthesized and which must then be acquired via the diet are referred to as essential.
[5] The substrate of Photorespiration is -
A.
Fructose
B.
Pyruvic acid
C.
Glycolate
D.
Glucose
Ans:
Glycolate
Explanation :
Photorespiration is a special type of respiration shown by many green plants when they are exposed to light. Glycolate (glycolic acid) is the chief metabolite of photorespiration and also its substrate. Other important metabolites are the amino acids glycine and serine.
[6] B-Diversity is also known as -
A.
Within habitat diversity
B.
Ecosystem diversity
C.
Global diversity
D.
Between habitat diversity
Ans:
Ecosystem diversity
Explanation :
Biodiversity includes three main types: diversity within species (genetic diversity), between species (species diversity) and between ecosystems (ecosystem diversity). Ecological diversity is the intricate network of different species present in local ecosystems and the dynamic interplay between them.
[7] Interferons are synthesized in response to -
A.
Bacteria
B.
Fungi
C.
Myroplasma
D.
Virus
Ans:
Virus
Explanation :
Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, parasites, or tumor cells. Interferon synthesis occurs primarily in response to viral single-stranded or double stranded RNA that are either the genetic material of RNA viruses or a product of viral transcription. Interferons are named for their ability to interfere with viral replication by protecting cells from virus infections.
[8] The resources which are obtained from biosphere and have life are -
A.
Potential resources
B.
Biotic resources
C.
Abiotic resources
D.
Renewable resources
Ans:
Biotic resources
Explanation :
Biotic resources describe living or once living resources of a community; for example organisms, such as plants and animals. They are obtained from the biosphere and have life. The resources which are composed of non-living things are called Abiotic Resources. For example, water, minerals, metals, wind, solar energy etc.
[9] Myrtecaine is study of -
A.
Insects
B.
Ants
C.
Crustaceans
D.
Arthropods
Ans:
Ants
Explanation :
Myrmecology is the scientific study of ants, a branch of entomology. The word myrtecology was coined by William Morton Wheeler (1865-1937), although human interest in the life of ants goes back further, with numerous ancient folk references.
[10] HIV often changes its shape due to the presence of an enzyme called -
A.
Reverse Transcriptase
B.
Enterokinase
C.
Nucleotidase
D.
Nucleoditase
Ans:
Reverse Transcriptase
Explanation :
Use of the reverse transcriptase enzyme is a unique characteristic of retroviruses such as HIV. After the virus releases its genetic material into a host cell, reverse transcriptase converts the viral RNA into a complementary piece of DNA. This process is known as 'reverse transcription'.
[11] The largest White Blood Corpuscle is -
A.
Lymphocyte
B.
Monocyte
C.
Thrombocyte
D.
Erythrocyte
Ans:
Monocyte
Explanation :
Monocytes are the largest white blood cell. When they leave the blood they’re called macrophages. Macrophages work with lymphocytes as antigen presenting cells.
[12] Root Hairs arise from -
A.
Cortex
B.
Pericycle
C.
Epidermis
D.
Endodermis
Ans:
Epidermis
Explanation :
Root hairs are tubular-shaped tip-growing cells that arise from epidermal cells known as trichoblasts, behind the tips of young roots. Like all tip-growing cells, root hairs grow by the addition of cell wall precursors to the tip delivered by vesicles from the endomembrane system.
[13] Vermicomposting is done by -
A.
Fungus
B.
Bacteria
C.
Worms
D.
Animals
Ans:
Worms
Explanation :
Vermicomposting is the process of using worms and micro-organisms to turn kitchen waste into black, earthy-smelling, nutrient-rich humus. Vermicompost is an excellent, nutrient-rich organic fertilizer and soil conditioner.
[14] 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.
[15] A cell increases in volume when it is placed in -
A.
Hypertonic solution
B.
Hypotonic solution
C.
Isotonic solution
D.
None of these
Ans:
Hypotonic solution
Explanation :
When a cell is placed in a hypotonic solution, water rushes into the membrane, increasing the cell's volume. Eventually, the cell's membrane is enlarged such that it pushes against the cell's rigid wall. At this point the cell is said to be turgid.
[16] Five Kingdom classification was given by -
A.
Whittaker
B.
Haeckel
C.
Linneus
D.
Copeland
Ans:
Whittaker
Explanation :
Robert Harding Whittaker was a distinguished American plant ecologist who was the first to propose the five-kingdom taxonomic classification of the world’s biota into the Animalia, Plantae, Fungi, Protista, and Monera in 1969. He also proposed the Whittaker Biome Classification, which categorized biome- types upon two abiotic factors: temperature and precipitation.
[17] Animals with Chitinous exoskeleton are -
A.
Insects
B.
Sponges
C.
Sea-Urchin
D.
Snails
Ans:
Insects
Explanation :
Chitin is the main component of the cell walls of fungi, the exoskeletons of arthropods such as crustaceans (e.g., crabs, lobsters and shrimps) and insects, the radulas of mollusks, and the beaks and internal shells of cephalopods, including squid and octopuses. Combined with calcium carbonate, as in the shells of Crustacean and mollusks, chitin produces a much stronger composite.
[18] The casual organism of Polio is -
A.
A fungi
B.
A virus
C.
A worm
D.
A bacteria
Ans:
A virus
Explanation :
Polio is a highly infectious disease caused by a virus. Its causative agent, poliovirus, was identified in 1908 by Karl Landsteiner. The polio virus invades the nervous system, and can cause total paralysis in a matter of hours.
[19] Panda belongs to the same family as that -
A.
Kangaroo
B.
Porcupine
C.
Whale
D.
Bear
Ans:
Bear
Explanation :
It is generally considered that the Panda belongs to the bear family, though differences persist. Some DNA studies have shown that the giant panda is closer to the bear family while the red panda is indeed closer to the raccoon family.
[20] What is the average 'Intelligence Quotient (IQ) of normal' persons?
A.
100 to 120
B.
90 to 110
C.
70 to 130
D.
50 to 100
Ans:
90 to 110
Explanation :
IQ is a number meant to measure people cognitive abilities (intelligence) in relation to their age group. An LQ between 90 and 110 is considered average; over 120, superior.
[21] A Parenchyma cell which stores ergastic substance is known as -
A.
Phragmoblast
B.
Idioblast
C.
Conidioplast
D.
Chloroplast
Ans:
Idioblast
Explanation :
Parenchyma cells containing ergastic substances are called idioblasts. Tannin cells, cells filled with raphides, etc. constitute idioblast. An idioblast is an isolated plant cell that differs from neighboring tissues. It carries out storage of reserves.
[22] Green manure is obtained from -
A.
Domestic vegetable waste
B.
Oil seed husk cakes
C.
Fresh animal excreta
D.
Decomposing green legume plants
Ans:
Decomposing green legume plants
Explanation :
Green undecomposed material used as manure is called green manure. It is obtained in two ways: (1) growing green manure crops usually belonging to leguminous family and incorporating into the soil after sufficient growth or (2) by collecting green leaf from plants grown in wastelands, field bonds and forest. The most important green manure crops are sunnhemp, dhaincha,. etc.
[23] Movement of hairs in Drosera is referred to as -
A.
Heliotropism
B.
Thigmotropism
C.
Photonastic
D.
Seismonastic
Ans:
Thigmotropism
Explanation :
Thigmonasty (thigmotropism) refers to plant movement in response to touch or physical contact without regard to the direction of the stimulus. Thigmonastic movements are exemplified by the closing of the insect-eating plant Venus’s flytrap (Dionaea muscipula) and the bending of the glandular hairs of sundew (Drosera sp.) as a result of contact with an insect.
[24] Milk of magnesia is a suspension of –
A.
magnesium sulphate
B.
magnesium carbonate
C.
magnesium hydroxide
D.
magnesium Chloride
Ans:
magnesium hydroxide
Explanation :
Magnesium hydroxide is an inorganic compound with the chemical formula Mg (OH)2. As a suspension in water, it is often called milk of magnesia because of its milk-like appearance. The solid mineral form of magnesium hydroxide is known as brucite. Magnesium hydroxide is a common component of antacids and laxatives; it interferes with the absorption of folic acid and iron. Magnesium hydroxide has low solubility in water, with a Ksp of 1.5×10–11; however all of the magnesium hydroxide that does dissolve dissociates.
[25] The histogen, from which epidermis is formed, is -
A.
Dermatogen
B.
Perlblern
C.
Plerome
D.
Calyptrogen
Ans:
Dermatogen
Explanation :
There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermatogen is the outermost layers, the cells of which divide anticlinally and give rise to the epidermis. Periblem and Plerome are the other two histogen.
Explanation :
Photorespiration is a special type of respiration shown by many green plants when they are exposed to light. Glycolate (glycolic acid) is the chief metabolite of photorespiration and also its substrate. Other important metabolites are the amino acids glycine and serine.
[6] B-Diversity is also known as -
A.
Within habitat diversity
B.
Ecosystem diversity
C.
Global diversity
D.
Between habitat diversity
Ans:
Ecosystem diversity
Explanation :
Biodiversity includes three main types: diversity within species (genetic diversity), between species (species diversity) and between ecosystems (ecosystem diversity). Ecological diversity is the intricate network of different species present in local ecosystems and the dynamic interplay between them.
[7] Interferons are synthesized in response to -
A.
Bacteria
B.
Fungi
C.
Myroplasma
D.
Virus
Ans:
Virus
Explanation :
Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, parasites, or tumor cells. Interferon synthesis occurs primarily in response to viral single-stranded or double stranded RNA that are either the genetic material of RNA viruses or a product of viral transcription. Interferons are named for their ability to interfere with viral replication by protecting cells from virus infections.
[8] The resources which are obtained from biosphere and have life are -
A.
Potential resources
B.
Biotic resources
C.
Abiotic resources
D.
Renewable resources
Ans:
Biotic resources
Explanation :
Biotic resources describe living or once living resources of a community; for example organisms, such as plants and animals. They are obtained from the biosphere and have life. The resources which are composed of non-living things are called Abiotic Resources. For example, water, minerals, metals, wind, solar energy etc.
[9] Myrtecaine is study of -
A.
Insects
B.
Ants
C.
Crustaceans
D.
Arthropods
Ans:
Ants
Explanation :
Myrmecology is the scientific study of ants, a branch of entomology. The word myrtecology was coined by William Morton Wheeler (1865-1937), although human interest in the life of ants goes back further, with numerous ancient folk references.
[10] HIV often changes its shape due to the presence of an enzyme called -
A.
Reverse Transcriptase
B.
Enterokinase
C.
Nucleotidase
D.
Nucleoditase
Ans:
Reverse Transcriptase
Explanation :
Use of the reverse transcriptase enzyme is a unique characteristic of retroviruses such as HIV. After the virus releases its genetic material into a host cell, reverse transcriptase converts the viral RNA into a complementary piece of DNA. This process is known as 'reverse transcription'.
[11] The largest White Blood Corpuscle is -
A.
Lymphocyte
B.
Monocyte
C.
Thrombocyte
D.
Erythrocyte
Ans:
Monocyte
Explanation :
Monocytes are the largest white blood cell. When they leave the blood they’re called macrophages. Macrophages work with lymphocytes as antigen presenting cells.
[12] Root Hairs arise from -
A.
Cortex
B.
Pericycle
C.
Epidermis
D.
Endodermis
Ans:
Epidermis
Explanation :
Root hairs are tubular-shaped tip-growing cells that arise from epidermal cells known as trichoblasts, behind the tips of young roots. Like all tip-growing cells, root hairs grow by the addition of cell wall precursors to the tip delivered by vesicles from the endomembrane system.
[13] Vermicomposting is done by -
A.
Fungus
B.
Bacteria
C.
Worms
D.
Animals
Ans:
Worms
Explanation :
Vermicomposting is the process of using worms and micro-organisms to turn kitchen waste into black, earthy-smelling, nutrient-rich humus. Vermicompost is an excellent, nutrient-rich organic fertilizer and soil conditioner.
[14] 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.
[15] A cell increases in volume when it is placed in -
A.
Hypertonic solution
B.
Hypotonic solution
C.
Isotonic solution
D.
None of these
Ans:
Hypotonic solution
Explanation :
When a cell is placed in a hypotonic solution, water rushes into the membrane, increasing the cell's volume. Eventually, the cell's membrane is enlarged such that it pushes against the cell's rigid wall. At this point the cell is said to be turgid.
[16] Five Kingdom classification was given by -
A.
Whittaker
B.
Haeckel
C.
Linneus
D.
Copeland
Ans:
Whittaker
Explanation :
Robert Harding Whittaker was a distinguished American plant ecologist who was the first to propose the five-kingdom taxonomic classification of the world’s biota into the Animalia, Plantae, Fungi, Protista, and Monera in 1969. He also proposed the Whittaker Biome Classification, which categorized biome- types upon two abiotic factors: temperature and precipitation.
[17] Animals with Chitinous exoskeleton are -
A.
Insects
B.
Sponges
C.
Sea-Urchin
D.
Snails
Ans:
Insects
Explanation :
Chitin is the main component of the cell walls of fungi, the exoskeletons of arthropods such as crustaceans (e.g., crabs, lobsters and shrimps) and insects, the radulas of mollusks, and the beaks and internal shells of cephalopods, including squid and octopuses. Combined with calcium carbonate, as in the shells of Crustacean and mollusks, chitin produces a much stronger composite.
[18] The casual organism of Polio is -
A.
A fungi
B.
A virus
C.
A worm
D.
A bacteria
Ans:
A virus
Explanation :
Polio is a highly infectious disease caused by a virus. Its causative agent, poliovirus, was identified in 1908 by Karl Landsteiner. The polio virus invades the nervous system, and can cause total paralysis in a matter of hours.
[19] Panda belongs to the same family as that -
A.
Kangaroo
B.
Porcupine
C.
Whale
D.
Bear
Ans:
Bear
Explanation :
It is generally considered that the Panda belongs to the bear family, though differences persist. Some DNA studies have shown that the giant panda is closer to the bear family while the red panda is indeed closer to the raccoon family.
[20] What is the average 'Intelligence Quotient (IQ) of normal' persons?
A.
100 to 120
B.
90 to 110
C.
70 to 130
D.
50 to 100
Ans:
90 to 110
Explanation :
IQ is a number meant to measure people cognitive abilities (intelligence) in relation to their age group. An LQ between 90 and 110 is considered average; over 120, superior.
[21] A Parenchyma cell which stores ergastic substance is known as -
A.
Phragmoblast
B.
Idioblast
C.
Conidioplast
D.
Chloroplast
Ans:
Idioblast
Explanation :
Parenchyma cells containing ergastic substances are called idioblasts. Tannin cells, cells filled with raphides, etc. constitute idioblast. An idioblast is an isolated plant cell that differs from neighboring tissues. It carries out storage of reserves.
[22] Green manure is obtained from -
A.
Domestic vegetable waste
B.
Oil seed husk cakes
C.
Fresh animal excreta
D.
Decomposing green legume plants
Ans:
Decomposing green legume plants
Explanation :
Green undecomposed material used as manure is called green manure. It is obtained in two ways: (1) growing green manure crops usually belonging to leguminous family and incorporating into the soil after sufficient growth or (2) by collecting green leaf from plants grown in wastelands, field bonds and forest. The most important green manure crops are sunnhemp, dhaincha,. etc.
[23] Movement of hairs in Drosera is referred to as -
A.
Heliotropism
B.
Thigmotropism
C.
Photonastic
D.
Seismonastic
Ans:
Thigmotropism
Explanation :
Thigmonasty (thigmotropism) refers to plant movement in response to touch or physical contact without regard to the direction of the stimulus. Thigmonastic movements are exemplified by the closing of the insect-eating plant Venus’s flytrap (Dionaea muscipula) and the bending of the glandular hairs of sundew (Drosera sp.) as a result of contact with an insect.
[24] Milk of magnesia is a suspension of –
A.
magnesium sulphate
B.
magnesium carbonate
C.
magnesium hydroxide
D.
magnesium Chloride
Ans:
magnesium hydroxide
Explanation :
Magnesium hydroxide is an inorganic compound with the chemical formula Mg (OH)2. As a suspension in water, it is often called milk of magnesia because of its milk-like appearance. The solid mineral form of magnesium hydroxide is known as brucite. Magnesium hydroxide is a common component of antacids and laxatives; it interferes with the absorption of folic acid and iron. Magnesium hydroxide has low solubility in water, with a Ksp of 1.5×10–11; however all of the magnesium hydroxide that does dissolve dissociates.
[25] The histogen, from which epidermis is formed, is -
A.
Dermatogen
B.
Perlblern
C.
Plerome
D.
Calyptrogen
Ans:
Dermatogen
Explanation :
There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermatogen is the outermost layers, the cells of which divide anticlinally and give rise to the epidermis. Periblem and Plerome are the other two histogen.
Explanation :
Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, parasites, or tumor cells. Interferon synthesis occurs primarily in response to viral single-stranded or double stranded RNA that are either the genetic material of RNA viruses or a product of viral transcription. Interferons are named for their ability to interfere with viral replication by protecting cells from virus infections.
[8] The resources which are obtained from biosphere and have life are -
A.
Potential resources
B.
Biotic resources
C.
Abiotic resources
D.
Renewable resources
Ans:
Biotic resources
Explanation :
Biotic resources describe living or once living resources of a community; for example organisms, such as plants and animals. They are obtained from the biosphere and have life. The resources which are composed of non-living things are called Abiotic Resources. For example, water, minerals, metals, wind, solar energy etc.
[9] Myrtecaine is study of -
A.
Insects
B.
Ants
C.
Crustaceans
D.
Arthropods
Ans:
Ants
Explanation :
Myrmecology is the scientific study of ants, a branch of entomology. The word myrtecology was coined by William Morton Wheeler (1865-1937), although human interest in the life of ants goes back further, with numerous ancient folk references.
[10] HIV often changes its shape due to the presence of an enzyme called -
A.
Reverse Transcriptase
B.
Enterokinase
C.
Nucleotidase
D.
Nucleoditase
Ans:
Reverse Transcriptase
Explanation :
Use of the reverse transcriptase enzyme is a unique characteristic of retroviruses such as HIV. After the virus releases its genetic material into a host cell, reverse transcriptase converts the viral RNA into a complementary piece of DNA. This process is known as 'reverse transcription'.
[11] The largest White Blood Corpuscle is -
A.
Lymphocyte
B.
Monocyte
C.
Thrombocyte
D.
Erythrocyte
Ans:
Monocyte
Explanation :
Monocytes are the largest white blood cell. When they leave the blood they’re called macrophages. Macrophages work with lymphocytes as antigen presenting cells.
[12] Root Hairs arise from -
A.
Cortex
B.
Pericycle
C.
Epidermis
D.
Endodermis
Ans:
Epidermis
Explanation :
Root hairs are tubular-shaped tip-growing cells that arise from epidermal cells known as trichoblasts, behind the tips of young roots. Like all tip-growing cells, root hairs grow by the addition of cell wall precursors to the tip delivered by vesicles from the endomembrane system.
[13] Vermicomposting is done by -
A.
Fungus
B.
Bacteria
C.
Worms
D.
Animals
Ans:
Worms
Explanation :
Vermicomposting is the process of using worms and micro-organisms to turn kitchen waste into black, earthy-smelling, nutrient-rich humus. Vermicompost is an excellent, nutrient-rich organic fertilizer and soil conditioner.
[14] 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.
[15] A cell increases in volume when it is placed in -
A.
Hypertonic solution
B.
Hypotonic solution
C.
Isotonic solution
D.
None of these
Ans:
Hypotonic solution
Explanation :
When a cell is placed in a hypotonic solution, water rushes into the membrane, increasing the cell's volume. Eventually, the cell's membrane is enlarged such that it pushes against the cell's rigid wall. At this point the cell is said to be turgid.
[16] Five Kingdom classification was given by -
A.
Whittaker
B.
Haeckel
C.
Linneus
D.
Copeland
Ans:
Whittaker
Explanation :
Robert Harding Whittaker was a distinguished American plant ecologist who was the first to propose the five-kingdom taxonomic classification of the world’s biota into the Animalia, Plantae, Fungi, Protista, and Monera in 1969. He also proposed the Whittaker Biome Classification, which categorized biome- types upon two abiotic factors: temperature and precipitation.
[17] Animals with Chitinous exoskeleton are -
A.
Insects
B.
Sponges
C.
Sea-Urchin
D.
Snails
Ans:
Insects
Explanation :
Chitin is the main component of the cell walls of fungi, the exoskeletons of arthropods such as crustaceans (e.g., crabs, lobsters and shrimps) and insects, the radulas of mollusks, and the beaks and internal shells of cephalopods, including squid and octopuses. Combined with calcium carbonate, as in the shells of Crustacean and mollusks, chitin produces a much stronger composite.
[18] The casual organism of Polio is -
A.
A fungi
B.
A virus
C.
A worm
D.
A bacteria
Ans:
A virus
Explanation :
Polio is a highly infectious disease caused by a virus. Its causative agent, poliovirus, was identified in 1908 by Karl Landsteiner. The polio virus invades the nervous system, and can cause total paralysis in a matter of hours.
[19] Panda belongs to the same family as that -
A.
Kangaroo
B.
Porcupine
C.
Whale
D.
Bear
Ans:
Bear
Explanation :
It is generally considered that the Panda belongs to the bear family, though differences persist. Some DNA studies have shown that the giant panda is closer to the bear family while the red panda is indeed closer to the raccoon family.
[20] What is the average 'Intelligence Quotient (IQ) of normal' persons?
A.
100 to 120
B.
90 to 110
C.
70 to 130
D.
50 to 100
Ans:
90 to 110
Explanation :
IQ is a number meant to measure people cognitive abilities (intelligence) in relation to their age group. An LQ between 90 and 110 is considered average; over 120, superior.
[21] A Parenchyma cell which stores ergastic substance is known as -
A.
Phragmoblast
B.
Idioblast
C.
Conidioplast
D.
Chloroplast
Ans:
Idioblast
Explanation :
Parenchyma cells containing ergastic substances are called idioblasts. Tannin cells, cells filled with raphides, etc. constitute idioblast. An idioblast is an isolated plant cell that differs from neighboring tissues. It carries out storage of reserves.
[22] Green manure is obtained from -
A.
Domestic vegetable waste
B.
Oil seed husk cakes
C.
Fresh animal excreta
D.
Decomposing green legume plants
Ans:
Decomposing green legume plants
Explanation :
Green undecomposed material used as manure is called green manure. It is obtained in two ways: (1) growing green manure crops usually belonging to leguminous family and incorporating into the soil after sufficient growth or (2) by collecting green leaf from plants grown in wastelands, field bonds and forest. The most important green manure crops are sunnhemp, dhaincha,. etc.
[23] Movement of hairs in Drosera is referred to as -
A.
Heliotropism
B.
Thigmotropism
C.
Photonastic
D.
Seismonastic
Ans:
Thigmotropism
Explanation :
Thigmonasty (thigmotropism) refers to plant movement in response to touch or physical contact without regard to the direction of the stimulus. Thigmonastic movements are exemplified by the closing of the insect-eating plant Venus’s flytrap (Dionaea muscipula) and the bending of the glandular hairs of sundew (Drosera sp.) as a result of contact with an insect.
[24] Milk of magnesia is a suspension of –
A.
magnesium sulphate
B.
magnesium carbonate
C.
magnesium hydroxide
D.
magnesium Chloride
Ans:
magnesium hydroxide
Explanation :
Magnesium hydroxide is an inorganic compound with the chemical formula Mg (OH)2. As a suspension in water, it is often called milk of magnesia because of its milk-like appearance. The solid mineral form of magnesium hydroxide is known as brucite. Magnesium hydroxide is a common component of antacids and laxatives; it interferes with the absorption of folic acid and iron. Magnesium hydroxide has low solubility in water, with a Ksp of 1.5×10–11; however all of the magnesium hydroxide that does dissolve dissociates.
[25] The histogen, from which epidermis is formed, is -
A.
Dermatogen
B.
Perlblern
C.
Plerome
D.
Calyptrogen
Ans:
Dermatogen
Explanation :
There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermatogen is the outermost layers, the cells of which divide anticlinally and give rise to the epidermis. Periblem and Plerome are the other two histogen.
Explanation :
Myrmecology is the scientific study of ants, a branch of entomology. The word myrtecology was coined by William Morton Wheeler (1865-1937), although human interest in the life of ants goes back further, with numerous ancient folk references.
[10] HIV often changes its shape due to the presence of an enzyme called -
A.
Reverse Transcriptase
B.
Enterokinase
C.
Nucleotidase
D.
Nucleoditase
Ans:
Reverse Transcriptase
Explanation :
Use of the reverse transcriptase enzyme is a unique characteristic of retroviruses such as HIV. After the virus releases its genetic material into a host cell, reverse transcriptase converts the viral RNA into a complementary piece of DNA. This process is known as 'reverse transcription'.
[11] The largest White Blood Corpuscle is -
A.
Lymphocyte
B.
Monocyte
C.
Thrombocyte
D.
Erythrocyte
Ans:
Monocyte
Explanation :
Monocytes are the largest white blood cell. When they leave the blood they’re called macrophages. Macrophages work with lymphocytes as antigen presenting cells.
[12] Root Hairs arise from -
A.
Cortex
B.
Pericycle
C.
Epidermis
D.
Endodermis
Ans:
Epidermis
Explanation :
Root hairs are tubular-shaped tip-growing cells that arise from epidermal cells known as trichoblasts, behind the tips of young roots. Like all tip-growing cells, root hairs grow by the addition of cell wall precursors to the tip delivered by vesicles from the endomembrane system.
[13] Vermicomposting is done by -
A.
Fungus
B.
Bacteria
C.
Worms
D.
Animals
Ans:
Worms
Explanation :
Vermicomposting is the process of using worms and micro-organisms to turn kitchen waste into black, earthy-smelling, nutrient-rich humus. Vermicompost is an excellent, nutrient-rich organic fertilizer and soil conditioner.
[14] 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.
[15] A cell increases in volume when it is placed in -
A.
Hypertonic solution
B.
Hypotonic solution
C.
Isotonic solution
D.
None of these
Ans:
Hypotonic solution
Explanation :
When a cell is placed in a hypotonic solution, water rushes into the membrane, increasing the cell's volume. Eventually, the cell's membrane is enlarged such that it pushes against the cell's rigid wall. At this point the cell is said to be turgid.
[16] Five Kingdom classification was given by -
A.
Whittaker
B.
Haeckel
C.
Linneus
D.
Copeland
Ans:
Whittaker
Explanation :
Robert Harding Whittaker was a distinguished American plant ecologist who was the first to propose the five-kingdom taxonomic classification of the world’s biota into the Animalia, Plantae, Fungi, Protista, and Monera in 1969. He also proposed the Whittaker Biome Classification, which categorized biome- types upon two abiotic factors: temperature and precipitation.
[17] Animals with Chitinous exoskeleton are -
A.
Insects
B.
Sponges
C.
Sea-Urchin
D.
Snails
Ans:
Insects
Explanation :
Chitin is the main component of the cell walls of fungi, the exoskeletons of arthropods such as crustaceans (e.g., crabs, lobsters and shrimps) and insects, the radulas of mollusks, and the beaks and internal shells of cephalopods, including squid and octopuses. Combined with calcium carbonate, as in the shells of Crustacean and mollusks, chitin produces a much stronger composite.
[18] The casual organism of Polio is -
A.
A fungi
B.
A virus
C.
A worm
D.
A bacteria
Ans:
A virus
Explanation :
Polio is a highly infectious disease caused by a virus. Its causative agent, poliovirus, was identified in 1908 by Karl Landsteiner. The polio virus invades the nervous system, and can cause total paralysis in a matter of hours.
[19] Panda belongs to the same family as that -
A.
Kangaroo
B.
Porcupine
C.
Whale
D.
Bear
Ans:
Bear
Explanation :
It is generally considered that the Panda belongs to the bear family, though differences persist. Some DNA studies have shown that the giant panda is closer to the bear family while the red panda is indeed closer to the raccoon family.
[20] What is the average 'Intelligence Quotient (IQ) of normal' persons?
A.
100 to 120
B.
90 to 110
C.
70 to 130
D.
50 to 100
Ans:
90 to 110
Explanation :
IQ is a number meant to measure people cognitive abilities (intelligence) in relation to their age group. An LQ between 90 and 110 is considered average; over 120, superior.
[21] A Parenchyma cell which stores ergastic substance is known as -
A.
Phragmoblast
B.
Idioblast
C.
Conidioplast
D.
Chloroplast
Ans:
Idioblast
Explanation :
Parenchyma cells containing ergastic substances are called idioblasts. Tannin cells, cells filled with raphides, etc. constitute idioblast. An idioblast is an isolated plant cell that differs from neighboring tissues. It carries out storage of reserves.
[22] Green manure is obtained from -
A.
Domestic vegetable waste
B.
Oil seed husk cakes
C.
Fresh animal excreta
D.
Decomposing green legume plants
Ans:
Decomposing green legume plants
Explanation :
Green undecomposed material used as manure is called green manure. It is obtained in two ways: (1) growing green manure crops usually belonging to leguminous family and incorporating into the soil after sufficient growth or (2) by collecting green leaf from plants grown in wastelands, field bonds and forest. The most important green manure crops are sunnhemp, dhaincha,. etc.
[23] Movement of hairs in Drosera is referred to as -
A.
Heliotropism
B.
Thigmotropism
C.
Photonastic
D.
Seismonastic
Ans:
Thigmotropism
Explanation :
Thigmonasty (thigmotropism) refers to plant movement in response to touch or physical contact without regard to the direction of the stimulus. Thigmonastic movements are exemplified by the closing of the insect-eating plant Venus’s flytrap (Dionaea muscipula) and the bending of the glandular hairs of sundew (Drosera sp.) as a result of contact with an insect.
[24] Milk of magnesia is a suspension of –
A.
magnesium sulphate
B.
magnesium carbonate
C.
magnesium hydroxide
D.
magnesium Chloride
Ans:
magnesium hydroxide
Explanation :
Magnesium hydroxide is an inorganic compound with the chemical formula Mg (OH)2. As a suspension in water, it is often called milk of magnesia because of its milk-like appearance. The solid mineral form of magnesium hydroxide is known as brucite. Magnesium hydroxide is a common component of antacids and laxatives; it interferes with the absorption of folic acid and iron. Magnesium hydroxide has low solubility in water, with a Ksp of 1.5×10–11; however all of the magnesium hydroxide that does dissolve dissociates.
[25] The histogen, from which epidermis is formed, is -
A.
Dermatogen
B.
Perlblern
C.
Plerome
D.
Calyptrogen
Ans:
Dermatogen
Explanation :
There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermatogen is the outermost layers, the cells of which divide anticlinally and give rise to the epidermis. Periblem and Plerome are the other two histogen.
Explanation :
Monocytes are the largest white blood cell. When they leave the blood they’re called macrophages. Macrophages work with lymphocytes as antigen presenting cells.
[12] Root Hairs arise from -
A.
Cortex
B.
Pericycle
C.
Epidermis
D.
Endodermis
Ans:
Epidermis
Explanation :
Root hairs are tubular-shaped tip-growing cells that arise from epidermal cells known as trichoblasts, behind the tips of young roots. Like all tip-growing cells, root hairs grow by the addition of cell wall precursors to the tip delivered by vesicles from the endomembrane system.
[13] Vermicomposting is done by -
A.
Fungus
B.
Bacteria
C.
Worms
D.
Animals
Ans:
Worms
Explanation :
Vermicomposting is the process of using worms and micro-organisms to turn kitchen waste into black, earthy-smelling, nutrient-rich humus. Vermicompost is an excellent, nutrient-rich organic fertilizer and soil conditioner.
[14] 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.
[15] A cell increases in volume when it is placed in -
A.
Hypertonic solution
B.
Hypotonic solution
C.
Isotonic solution
D.
None of these
Ans:
Hypotonic solution
Explanation :
When a cell is placed in a hypotonic solution, water rushes into the membrane, increasing the cell's volume. Eventually, the cell's membrane is enlarged such that it pushes against the cell's rigid wall. At this point the cell is said to be turgid.
[16] Five Kingdom classification was given by -
A.
Whittaker
B.
Haeckel
C.
Linneus
D.
Copeland
Ans:
Whittaker
Explanation :
Robert Harding Whittaker was a distinguished American plant ecologist who was the first to propose the five-kingdom taxonomic classification of the world’s biota into the Animalia, Plantae, Fungi, Protista, and Monera in 1969. He also proposed the Whittaker Biome Classification, which categorized biome- types upon two abiotic factors: temperature and precipitation.
[17] Animals with Chitinous exoskeleton are -
A.
Insects
B.
Sponges
C.
Sea-Urchin
D.
Snails
Ans:
Insects
Explanation :
Chitin is the main component of the cell walls of fungi, the exoskeletons of arthropods such as crustaceans (e.g., crabs, lobsters and shrimps) and insects, the radulas of mollusks, and the beaks and internal shells of cephalopods, including squid and octopuses. Combined with calcium carbonate, as in the shells of Crustacean and mollusks, chitin produces a much stronger composite.
[18] The casual organism of Polio is -
A.
A fungi
B.
A virus
C.
A worm
D.
A bacteria
Ans:
A virus
Explanation :
Polio is a highly infectious disease caused by a virus. Its causative agent, poliovirus, was identified in 1908 by Karl Landsteiner. The polio virus invades the nervous system, and can cause total paralysis in a matter of hours.
[19] Panda belongs to the same family as that -
A.
Kangaroo
B.
Porcupine
C.
Whale
D.
Bear
Ans:
Bear
Explanation :
It is generally considered that the Panda belongs to the bear family, though differences persist. Some DNA studies have shown that the giant panda is closer to the bear family while the red panda is indeed closer to the raccoon family.
[20] What is the average 'Intelligence Quotient (IQ) of normal' persons?
A.
100 to 120
B.
90 to 110
C.
70 to 130
D.
50 to 100
Ans:
90 to 110
Explanation :
IQ is a number meant to measure people cognitive abilities (intelligence) in relation to their age group. An LQ between 90 and 110 is considered average; over 120, superior.
[21] A Parenchyma cell which stores ergastic substance is known as -
A.
Phragmoblast
B.
Idioblast
C.
Conidioplast
D.
Chloroplast
Ans:
Idioblast
Explanation :
Parenchyma cells containing ergastic substances are called idioblasts. Tannin cells, cells filled with raphides, etc. constitute idioblast. An idioblast is an isolated plant cell that differs from neighboring tissues. It carries out storage of reserves.
[22] Green manure is obtained from -
A.
Domestic vegetable waste
B.
Oil seed husk cakes
C.
Fresh animal excreta
D.
Decomposing green legume plants
Ans:
Decomposing green legume plants
Explanation :
Green undecomposed material used as manure is called green manure. It is obtained in two ways: (1) growing green manure crops usually belonging to leguminous family and incorporating into the soil after sufficient growth or (2) by collecting green leaf from plants grown in wastelands, field bonds and forest. The most important green manure crops are sunnhemp, dhaincha,. etc.
[23] Movement of hairs in Drosera is referred to as -
A.
Heliotropism
B.
Thigmotropism
C.
Photonastic
D.
Seismonastic
Ans:
Thigmotropism
Explanation :
Thigmonasty (thigmotropism) refers to plant movement in response to touch or physical contact without regard to the direction of the stimulus. Thigmonastic movements are exemplified by the closing of the insect-eating plant Venus’s flytrap (Dionaea muscipula) and the bending of the glandular hairs of sundew (Drosera sp.) as a result of contact with an insect.
[24] Milk of magnesia is a suspension of –
A.
magnesium sulphate
B.
magnesium carbonate
C.
magnesium hydroxide
D.
magnesium Chloride
Ans:
magnesium hydroxide
Explanation :
Magnesium hydroxide is an inorganic compound with the chemical formula Mg (OH)2. As a suspension in water, it is often called milk of magnesia because of its milk-like appearance. The solid mineral form of magnesium hydroxide is known as brucite. Magnesium hydroxide is a common component of antacids and laxatives; it interferes with the absorption of folic acid and iron. Magnesium hydroxide has low solubility in water, with a Ksp of 1.5×10–11; however all of the magnesium hydroxide that does dissolve dissociates.
[25] The histogen, from which epidermis is formed, is -
A.
Dermatogen
B.
Perlblern
C.
Plerome
D.
Calyptrogen
Ans:
Dermatogen
Explanation :
There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermatogen is the outermost layers, the cells of which divide anticlinally and give rise to the epidermis. Periblem and Plerome are the other two histogen.
Explanation :
Vermicomposting is the process of using worms and micro-organisms to turn kitchen waste into black, earthy-smelling, nutrient-rich humus. Vermicompost is an excellent, nutrient-rich organic fertilizer and soil conditioner.
[14] 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.
[15] A cell increases in volume when it is placed in -
A.
Hypertonic solution
B.
Hypotonic solution
C.
Isotonic solution
D.
None of these
Ans:
Hypotonic solution
Explanation :
When a cell is placed in a hypotonic solution, water rushes into the membrane, increasing the cell's volume. Eventually, the cell's membrane is enlarged such that it pushes against the cell's rigid wall. At this point the cell is said to be turgid.
[16] Five Kingdom classification was given by -
A.
Whittaker
B.
Haeckel
C.
Linneus
D.
Copeland
Ans:
Whittaker
Explanation :
Robert Harding Whittaker was a distinguished American plant ecologist who was the first to propose the five-kingdom taxonomic classification of the world’s biota into the Animalia, Plantae, Fungi, Protista, and Monera in 1969. He also proposed the Whittaker Biome Classification, which categorized biome- types upon two abiotic factors: temperature and precipitation.
[17] Animals with Chitinous exoskeleton are -
A.
Insects
B.
Sponges
C.
Sea-Urchin
D.
Snails
Ans:
Insects
Explanation :
Chitin is the main component of the cell walls of fungi, the exoskeletons of arthropods such as crustaceans (e.g., crabs, lobsters and shrimps) and insects, the radulas of mollusks, and the beaks and internal shells of cephalopods, including squid and octopuses. Combined with calcium carbonate, as in the shells of Crustacean and mollusks, chitin produces a much stronger composite.
[18] The casual organism of Polio is -
A.
A fungi
B.
A virus
C.
A worm
D.
A bacteria
Ans:
A virus
Explanation :
Polio is a highly infectious disease caused by a virus. Its causative agent, poliovirus, was identified in 1908 by Karl Landsteiner. The polio virus invades the nervous system, and can cause total paralysis in a matter of hours.
[19] Panda belongs to the same family as that -
A.
Kangaroo
B.
Porcupine
C.
Whale
D.
Bear
Ans:
Bear
Explanation :
It is generally considered that the Panda belongs to the bear family, though differences persist. Some DNA studies have shown that the giant panda is closer to the bear family while the red panda is indeed closer to the raccoon family.
[20] What is the average 'Intelligence Quotient (IQ) of normal' persons?
A.
100 to 120
B.
90 to 110
C.
70 to 130
D.
50 to 100
Ans:
90 to 110
Explanation :
IQ is a number meant to measure people cognitive abilities (intelligence) in relation to their age group. An LQ between 90 and 110 is considered average; over 120, superior.
[21] A Parenchyma cell which stores ergastic substance is known as -
A.
Phragmoblast
B.
Idioblast
C.
Conidioplast
D.
Chloroplast
Ans:
Idioblast
Explanation :
Parenchyma cells containing ergastic substances are called idioblasts. Tannin cells, cells filled with raphides, etc. constitute idioblast. An idioblast is an isolated plant cell that differs from neighboring tissues. It carries out storage of reserves.
[22] Green manure is obtained from -
A.
Domestic vegetable waste
B.
Oil seed husk cakes
C.
Fresh animal excreta
D.
Decomposing green legume plants
Ans:
Decomposing green legume plants
Explanation :
Green undecomposed material used as manure is called green manure. It is obtained in two ways: (1) growing green manure crops usually belonging to leguminous family and incorporating into the soil after sufficient growth or (2) by collecting green leaf from plants grown in wastelands, field bonds and forest. The most important green manure crops are sunnhemp, dhaincha,. etc.
[23] Movement of hairs in Drosera is referred to as -
A.
Heliotropism
B.
Thigmotropism
C.
Photonastic
D.
Seismonastic
Ans:
Thigmotropism
Explanation :
Thigmonasty (thigmotropism) refers to plant movement in response to touch or physical contact without regard to the direction of the stimulus. Thigmonastic movements are exemplified by the closing of the insect-eating plant Venus’s flytrap (Dionaea muscipula) and the bending of the glandular hairs of sundew (Drosera sp.) as a result of contact with an insect.
[24] Milk of magnesia is a suspension of –
A.
magnesium sulphate
B.
magnesium carbonate
C.
magnesium hydroxide
D.
magnesium Chloride
Ans:
magnesium hydroxide
Explanation :
Magnesium hydroxide is an inorganic compound with the chemical formula Mg (OH)2. As a suspension in water, it is often called milk of magnesia because of its milk-like appearance. The solid mineral form of magnesium hydroxide is known as brucite. Magnesium hydroxide is a common component of antacids and laxatives; it interferes with the absorption of folic acid and iron. Magnesium hydroxide has low solubility in water, with a Ksp of 1.5×10–11; however all of the magnesium hydroxide that does dissolve dissociates.
[25] The histogen, from which epidermis is formed, is -
A.
Dermatogen
B.
Perlblern
C.
Plerome
D.
Calyptrogen
Ans:
Dermatogen
Explanation :
There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermatogen is the outermost layers, the cells of which divide anticlinally and give rise to the epidermis. Periblem and Plerome are the other two histogen.
Explanation :
When a cell is placed in a hypotonic solution, water rushes into the membrane, increasing the cell's volume. Eventually, the cell's membrane is enlarged such that it pushes against the cell's rigid wall. At this point the cell is said to be turgid.
[16] Five Kingdom classification was given by -
A.
Whittaker
B.
Haeckel
C.
Linneus
D.
Copeland
Ans:
Whittaker
Explanation :
Robert Harding Whittaker was a distinguished American plant ecologist who was the first to propose the five-kingdom taxonomic classification of the world’s biota into the Animalia, Plantae, Fungi, Protista, and Monera in 1969. He also proposed the Whittaker Biome Classification, which categorized biome- types upon two abiotic factors: temperature and precipitation.
[17] Animals with Chitinous exoskeleton are -
A.
Insects
B.
Sponges
C.
Sea-Urchin
D.
Snails
Ans:
Insects
Explanation :
Chitin is the main component of the cell walls of fungi, the exoskeletons of arthropods such as crustaceans (e.g., crabs, lobsters and shrimps) and insects, the radulas of mollusks, and the beaks and internal shells of cephalopods, including squid and octopuses. Combined with calcium carbonate, as in the shells of Crustacean and mollusks, chitin produces a much stronger composite.
[18] The casual organism of Polio is -
A.
A fungi
B.
A virus
C.
A worm
D.
A bacteria
Ans:
A virus
Explanation :
Polio is a highly infectious disease caused by a virus. Its causative agent, poliovirus, was identified in 1908 by Karl Landsteiner. The polio virus invades the nervous system, and can cause total paralysis in a matter of hours.
[19] Panda belongs to the same family as that -
A.
Kangaroo
B.
Porcupine
C.
Whale
D.
Bear
Ans:
Bear
Explanation :
It is generally considered that the Panda belongs to the bear family, though differences persist. Some DNA studies have shown that the giant panda is closer to the bear family while the red panda is indeed closer to the raccoon family.
[20] What is the average 'Intelligence Quotient (IQ) of normal' persons?
A.
100 to 120
B.
90 to 110
C.
70 to 130
D.
50 to 100
Ans:
90 to 110
Explanation :
IQ is a number meant to measure people cognitive abilities (intelligence) in relation to their age group. An LQ between 90 and 110 is considered average; over 120, superior.
[21] A Parenchyma cell which stores ergastic substance is known as -
A.
Phragmoblast
B.
Idioblast
C.
Conidioplast
D.
Chloroplast
Ans:
Idioblast
Explanation :
Parenchyma cells containing ergastic substances are called idioblasts. Tannin cells, cells filled with raphides, etc. constitute idioblast. An idioblast is an isolated plant cell that differs from neighboring tissues. It carries out storage of reserves.
[22] Green manure is obtained from -
A.
Domestic vegetable waste
B.
Oil seed husk cakes
C.
Fresh animal excreta
D.
Decomposing green legume plants
Ans:
Decomposing green legume plants
Explanation :
Green undecomposed material used as manure is called green manure. It is obtained in two ways: (1) growing green manure crops usually belonging to leguminous family and incorporating into the soil after sufficient growth or (2) by collecting green leaf from plants grown in wastelands, field bonds and forest. The most important green manure crops are sunnhemp, dhaincha,. etc.
[23] Movement of hairs in Drosera is referred to as -
A.
Heliotropism
B.
Thigmotropism
C.
Photonastic
D.
Seismonastic
Ans:
Thigmotropism
Explanation :
Thigmonasty (thigmotropism) refers to plant movement in response to touch or physical contact without regard to the direction of the stimulus. Thigmonastic movements are exemplified by the closing of the insect-eating plant Venus’s flytrap (Dionaea muscipula) and the bending of the glandular hairs of sundew (Drosera sp.) as a result of contact with an insect.
[24] Milk of magnesia is a suspension of –
A.
magnesium sulphate
B.
magnesium carbonate
C.
magnesium hydroxide
D.
magnesium Chloride
Ans:
magnesium hydroxide
Explanation :
Magnesium hydroxide is an inorganic compound with the chemical formula Mg (OH)2. As a suspension in water, it is often called milk of magnesia because of its milk-like appearance. The solid mineral form of magnesium hydroxide is known as brucite. Magnesium hydroxide is a common component of antacids and laxatives; it interferes with the absorption of folic acid and iron. Magnesium hydroxide has low solubility in water, with a Ksp of 1.5×10–11; however all of the magnesium hydroxide that does dissolve dissociates.
[25] The histogen, from which epidermis is formed, is -
A.
Dermatogen
B.
Perlblern
C.
Plerome
D.
Calyptrogen
Ans:
Dermatogen
Explanation :
There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermatogen is the outermost layers, the cells of which divide anticlinally and give rise to the epidermis. Periblem and Plerome are the other two histogen.
Explanation :
Chitin is the main component of the cell walls of fungi, the exoskeletons of arthropods such as crustaceans (e.g., crabs, lobsters and shrimps) and insects, the radulas of mollusks, and the beaks and internal shells of cephalopods, including squid and octopuses. Combined with calcium carbonate, as in the shells of Crustacean and mollusks, chitin produces a much stronger composite.
[18] The casual organism of Polio is -
A.
A fungi
B.
A virus
C.
A worm
D.
A bacteria
Ans:
A virus
Explanation :
Polio is a highly infectious disease caused by a virus. Its causative agent, poliovirus, was identified in 1908 by Karl Landsteiner. The polio virus invades the nervous system, and can cause total paralysis in a matter of hours.
[19] Panda belongs to the same family as that -
A.
Kangaroo
B.
Porcupine
C.
Whale
D.
Bear
Ans:
Bear
Explanation :
It is generally considered that the Panda belongs to the bear family, though differences persist. Some DNA studies have shown that the giant panda is closer to the bear family while the red panda is indeed closer to the raccoon family.
[20] What is the average 'Intelligence Quotient (IQ) of normal' persons?
A.
100 to 120
B.
90 to 110
C.
70 to 130
D.
50 to 100
Ans:
90 to 110
Explanation :
IQ is a number meant to measure people cognitive abilities (intelligence) in relation to their age group. An LQ between 90 and 110 is considered average; over 120, superior.
[21] A Parenchyma cell which stores ergastic substance is known as -
A.
Phragmoblast
B.
Idioblast
C.
Conidioplast
D.
Chloroplast
Ans:
Idioblast
Explanation :
Parenchyma cells containing ergastic substances are called idioblasts. Tannin cells, cells filled with raphides, etc. constitute idioblast. An idioblast is an isolated plant cell that differs from neighboring tissues. It carries out storage of reserves.
[22] Green manure is obtained from -
A.
Domestic vegetable waste
B.
Oil seed husk cakes
C.
Fresh animal excreta
D.
Decomposing green legume plants
Ans:
Decomposing green legume plants
Explanation :
Green undecomposed material used as manure is called green manure. It is obtained in two ways: (1) growing green manure crops usually belonging to leguminous family and incorporating into the soil after sufficient growth or (2) by collecting green leaf from plants grown in wastelands, field bonds and forest. The most important green manure crops are sunnhemp, dhaincha,. etc.
[23] Movement of hairs in Drosera is referred to as -
A.
Heliotropism
B.
Thigmotropism
C.
Photonastic
D.
Seismonastic
Ans:
Thigmotropism
Explanation :
Thigmonasty (thigmotropism) refers to plant movement in response to touch or physical contact without regard to the direction of the stimulus. Thigmonastic movements are exemplified by the closing of the insect-eating plant Venus’s flytrap (Dionaea muscipula) and the bending of the glandular hairs of sundew (Drosera sp.) as a result of contact with an insect.
[24] Milk of magnesia is a suspension of –
A.
magnesium sulphate
B.
magnesium carbonate
C.
magnesium hydroxide
D.
magnesium Chloride
Ans:
magnesium hydroxide
Explanation :
Magnesium hydroxide is an inorganic compound with the chemical formula Mg (OH)2. As a suspension in water, it is often called milk of magnesia because of its milk-like appearance. The solid mineral form of magnesium hydroxide is known as brucite. Magnesium hydroxide is a common component of antacids and laxatives; it interferes with the absorption of folic acid and iron. Magnesium hydroxide has low solubility in water, with a Ksp of 1.5×10–11; however all of the magnesium hydroxide that does dissolve dissociates.
[25] The histogen, from which epidermis is formed, is -
A.
Dermatogen
B.
Perlblern
C.
Plerome
D.
Calyptrogen
Ans:
Dermatogen
Explanation :
There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermatogen is the outermost layers, the cells of which divide anticlinally and give rise to the epidermis. Periblem and Plerome are the other two histogen.
Explanation :
It is generally considered that the Panda belongs to the bear family, though differences persist. Some DNA studies have shown that the giant panda is closer to the bear family while the red panda is indeed closer to the raccoon family.
[20] What is the average 'Intelligence Quotient (IQ) of normal' persons?
A.
100 to 120
B.
90 to 110
C.
70 to 130
D.
50 to 100
Ans:
90 to 110
Explanation :
IQ is a number meant to measure people cognitive abilities (intelligence) in relation to their age group. An LQ between 90 and 110 is considered average; over 120, superior.
[21] A Parenchyma cell which stores ergastic substance is known as -
A.
Phragmoblast
B.
Idioblast
C.
Conidioplast
D.
Chloroplast
Ans:
Idioblast
Explanation :
Parenchyma cells containing ergastic substances are called idioblasts. Tannin cells, cells filled with raphides, etc. constitute idioblast. An idioblast is an isolated plant cell that differs from neighboring tissues. It carries out storage of reserves.
[22] Green manure is obtained from -
A.
Domestic vegetable waste
B.
Oil seed husk cakes
C.
Fresh animal excreta
D.
Decomposing green legume plants
Ans:
Decomposing green legume plants
Explanation :
Green undecomposed material used as manure is called green manure. It is obtained in two ways: (1) growing green manure crops usually belonging to leguminous family and incorporating into the soil after sufficient growth or (2) by collecting green leaf from plants grown in wastelands, field bonds and forest. The most important green manure crops are sunnhemp, dhaincha,. etc.
[23] Movement of hairs in Drosera is referred to as -
A.
Heliotropism
B.
Thigmotropism
C.
Photonastic
D.
Seismonastic
Ans:
Thigmotropism
Explanation :
Thigmonasty (thigmotropism) refers to plant movement in response to touch or physical contact without regard to the direction of the stimulus. Thigmonastic movements are exemplified by the closing of the insect-eating plant Venus’s flytrap (Dionaea muscipula) and the bending of the glandular hairs of sundew (Drosera sp.) as a result of contact with an insect.
[24] Milk of magnesia is a suspension of –
A.
magnesium sulphate
B.
magnesium carbonate
C.
magnesium hydroxide
D.
magnesium Chloride
Ans:
magnesium hydroxide
Explanation :
Magnesium hydroxide is an inorganic compound with the chemical formula Mg (OH)2. As a suspension in water, it is often called milk of magnesia because of its milk-like appearance. The solid mineral form of magnesium hydroxide is known as brucite. Magnesium hydroxide is a common component of antacids and laxatives; it interferes with the absorption of folic acid and iron. Magnesium hydroxide has low solubility in water, with a Ksp of 1.5×10–11; however all of the magnesium hydroxide that does dissolve dissociates.
[25] The histogen, from which epidermis is formed, is -
A.
Dermatogen
B.
Perlblern
C.
Plerome
D.
Calyptrogen
Ans:
Dermatogen
Explanation :
There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermatogen is the outermost layers, the cells of which divide anticlinally and give rise to the epidermis. Periblem and Plerome are the other two histogen.
Explanation :
Parenchyma cells containing ergastic substances are called idioblasts. Tannin cells, cells filled with raphides, etc. constitute idioblast. An idioblast is an isolated plant cell that differs from neighboring tissues. It carries out storage of reserves.
[22] Green manure is obtained from -
A.
Domestic vegetable waste
B.
Oil seed husk cakes
C.
Fresh animal excreta
D.
Decomposing green legume plants
Ans:
Decomposing green legume plants
Explanation :
Green undecomposed material used as manure is called green manure. It is obtained in two ways: (1) growing green manure crops usually belonging to leguminous family and incorporating into the soil after sufficient growth or (2) by collecting green leaf from plants grown in wastelands, field bonds and forest. The most important green manure crops are sunnhemp, dhaincha,. etc.
[23] Movement of hairs in Drosera is referred to as -
A.
Heliotropism
B.
Thigmotropism
C.
Photonastic
D.
Seismonastic
Ans:
Thigmotropism
Explanation :
Thigmonasty (thigmotropism) refers to plant movement in response to touch or physical contact without regard to the direction of the stimulus. Thigmonastic movements are exemplified by the closing of the insect-eating plant Venus’s flytrap (Dionaea muscipula) and the bending of the glandular hairs of sundew (Drosera sp.) as a result of contact with an insect.
[24] Milk of magnesia is a suspension of –
A.
magnesium sulphate
B.
magnesium carbonate
C.
magnesium hydroxide
D.
magnesium Chloride
Ans:
magnesium hydroxide
Explanation :
Magnesium hydroxide is an inorganic compound with the chemical formula Mg (OH)2. As a suspension in water, it is often called milk of magnesia because of its milk-like appearance. The solid mineral form of magnesium hydroxide is known as brucite. Magnesium hydroxide is a common component of antacids and laxatives; it interferes with the absorption of folic acid and iron. Magnesium hydroxide has low solubility in water, with a Ksp of 1.5×10–11; however all of the magnesium hydroxide that does dissolve dissociates.
[25] The histogen, from which epidermis is formed, is -
A.
Dermatogen
B.
Perlblern
C.
Plerome
D.
Calyptrogen
Ans:
Dermatogen
Explanation :
There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermatogen is the outermost layers, the cells of which divide anticlinally and give rise to the epidermis. Periblem and Plerome are the other two histogen.
Explanation :
Thigmonasty (thigmotropism) refers to plant movement in response to touch or physical contact without regard to the direction of the stimulus. Thigmonastic movements are exemplified by the closing of the insect-eating plant Venus’s flytrap (Dionaea muscipula) and the bending of the glandular hairs of sundew (Drosera sp.) as a result of contact with an insect.
[24] Milk of magnesia is a suspension of –
A.
magnesium sulphate
B.
magnesium carbonate
C.
magnesium hydroxide
D.
magnesium Chloride
Ans:
magnesium hydroxide
Explanation :
Magnesium hydroxide is an inorganic compound with the chemical formula Mg (OH)2. As a suspension in water, it is often called milk of magnesia because of its milk-like appearance. The solid mineral form of magnesium hydroxide is known as brucite. Magnesium hydroxide is a common component of antacids and laxatives; it interferes with the absorption of folic acid and iron. Magnesium hydroxide has low solubility in water, with a Ksp of 1.5×10–11; however all of the magnesium hydroxide that does dissolve dissociates.
[25] The histogen, from which epidermis is formed, is -
A.
Dermatogen
B.
Perlblern
C.
Plerome
D.
Calyptrogen
Ans:
Dermatogen
Explanation :
There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermatogen is the outermost layers, the cells of which divide anticlinally and give rise to the epidermis. Periblem and Plerome are the other two histogen.
Explanation :
There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermatogen is the outermost layers, the cells of which divide anticlinally and give rise to the epidermis. Periblem and Plerome are the other two histogen.