[1] Which of the following is/are digestive enzymes?
A.
Trypsin
B.
Lipase
C.
Pepsin
D.
All of the above
Ans:
All of the above
Explanation :
All of the above are digestive enzymes and help in the breaking down of complex food particles into simple ones. These simple particles can be easily absorbed by the blood and thus transported to all the cells of the body.
[2] Which of the following does not act both as an exocrine gland and as an endocrine gland?
A.
Pituitary
B.
Pancreas
C.
Testis
D.
Ovary
Ans:
Pituitary
Explanation :
The pancreas, located in the abdomen close to the stomach, is both an exocrine and an endocrine gland. Similarly, gonads (both ovaries and testes) are examples of organs that have both endocrine and exocrine functions. The endocrine function of the gonads is the production of the sex hormones (estrogens and androgens); while their exocrine function is to produce gametes
[3] Which of the following is/are examples for symbiotic association?
A.
Algae - lichen
B.
Plant roots - rhizobium bacteria
C.
Both are right
D.
Both are wrong
Ans:
Both are right
Explanation :
0
[4] Coupling and repulsion are the two states of -
A.
linkage
B.
chiasma
C.
mutation
D.
crossing over
Ans:
linkage
Explanation :
Genetic linkage is the tendency of genes that are located proximal to each other on a chromosome to be inherited together during meiosis. The figure below depicts the gamete composition for linked genes from coupling and repulsion crosses:
[5] Stamens are fused with each other by their anthers and also with the petals in -
A.
Leguminosae
B.
Liliaceae
C.
Compositae
D.
Euphorbiaceae
Ans:
Compositae
Explanation :
The loose union of structure of the same whorl is called cohesion, but the intimate histological union is called connation. When anthers are fused with each other, the condition is described as syngenesious e.g., Compositae, Lobeliaceae. This fusion is called cohesion. When there is fusion of stamens with petals, they are described as epipetalous e.g., Gamopetale.
[6] An organism which can monitor air pollution is -
A.
Bacteria
B.
Lichen
C.
Algae
D.
Fungi
Ans:
Lichen
Explanation :
Lichens can be used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. Air pollutants dissolved in rainwater, especially sulfur dioxide, can damage lichens, and prevent them from growing. This makes lichens natural indicators of air pollution.
[7] In the human body, which of the following organs is responsible for water balance?
A.
Heart
B.
Liver
C.
Kidneys
D.
Lungs
Ans:
Kidneys
Explanation :
The kidneys maintain our body's water balance by controlling the water concentration of blood plasma. The kidneys also control salt levels and the excretion of urea.
[8] The beetroot is the portion of the beet plant -
A.
tap root
B.
adventitious
C.
bulb of the stem
D.
rhizome
Ans:
tap root
Explanation :
The beetroot is the taproot portion of the beet plant. Beet plant it is one of several of the cultivated varieties of Beta vulgar is grown for their edible taproots and their leaves (called beet greens).
[9] Chlorophyll contains -
A.
Iron
B.
Magnesium
C.
Cobalt
D.
Zinc
Ans:
Magnesium
Explanation :
Chlorophyll molecule contains a magnesium ion. Green plants are dependent on chlorophyll for photosynthesis, and magnesium is required for chlorophyll production.
[10] Hydroponics is a method of culture of plants without using -
A.
water
B.
light
C.
sand
D.
soil
Ans:
soil
Explanation :
Hydroponics is a method of growing plants using mineral nutrient solutions, in water, without soil. Plants are grown with their roots in the mineral nutrient solution only or in an inert medium, such as perlite, gravel, mineral wool, expanded clay pebbles or coconut husk.
[11] Natural system of classification was proposed by botanists.
A.
Indian
B.
German
C.
Swedish
D.
British
Ans:
British
Explanation :
The best and a highly recognized natural system of classification were proposed by George Bentham and Sir Joseph Hooker, two great British botanists associated with Royal Botanical Garden at Kew, in their General Plantarum (1862-1883). They classified plants strictly on the basis of a natural scheme. This system is based not only on the characters of the reproductive organs and structural relationship, but all the other important characters are also taken into consideration and the plants are classified according to their related characters.
[12] The metal ion present in vitamin B12 is -
A.
cobalt
B.
zinc
C.
nickel
D.
iron
Ans:
cobalt
Explanation :
The structure of B12 is based on a corrin ring, which is similar to the porphyrin ring found in heme, chlorophyll, and cytochrome. It contains the biochemically rare element cobalt sitting in the center of the ring. Also called cobalamin, it is a water-soluble vitamin.
[13] Microbial degradation of nitrates into atmospheric nitrogen is known as-
A.
Ammonification
B.
Nitrification
C.
Denitrification
D.
Putrefaction
Ans:
Denitrification
Explanation :
Denitrification is the biological conversion of nitrate to nitrogen gas, nitric oxide or nitrous oxide. It refers to nitrate reduction by bacterial species such as Pseudomonas and Clostridium, usually in anaerobic conditions that ultimately produces molecular nitrogen (N2). These bacteria use nitrate as an electron acceptor instead of oxygen during respiration.
[14] Study of organisms in relation to their environment is called -
A.
Ecology
B.
Zoology
C.
Entomology
D.
Paiynology
Ans:
Ecology
Explanation :
Ecology is the scientific study of interactions among organisms and their environment, such as the interactions organisms have with each other and with their abiotic environment. Topics of interest to ecologists include the diversity, distribution, amount (biomass), number (population) of organisms, as well as competition between them within and among ecosystems.
[15] Crossing over takes place during which of the following stage?
A.
Leptotene
B.
Zygotene
C.
Pachytene
D.
Diplotene
Ans:
Pachytene
Explanation :
Crossing over takes place during the pachytene stage. During this stage, non-sister chromatids of homologous chromosomes may exchange segments over regions of homology. Sex chromosomes, however, are not wholly identical, and only exchange information over a small region of homology. At the sites where exchange happens, chiasmata form. The exchange of information between the non- sister chromatids results in a recombination of information; each chromosome has the complete set of information it had before, and there are no gaps formed as a result of the process. Because the chromosomes cannot be distinguished in the synaptonemal complex, the actual act of crossing over is not perceivable through the microscope, and chiasmata are not visible until the next stage.
[16] Red rot of sugarcane is caused by -
A.
Alternaria altemata
B.
Phylophthora infestans
C.
Colletotrichurn falcatum
D.
Cercospora personata
Ans:
Colletotrichurn falcatum
Explanation :
Red rot disease is caused by the fungus Glomerella tucumanensis. 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.
[17] 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.
[18] Cactus is referred to as -
A.
Hydrophyte
B.
Mesophyte
C.
Xerophyte
D.
Epiphyte
Ans:
Xerophyte
Explanation :
Cactus is a xerophyte as it specializes in surviving in hot and dry environments. Xerophytes are plants that are adapted to survive in an environment with little water, such as a desert or an ice- or snowcovered region in the Alps or the Arctic.
[19] How many neck canal cells are found in the archegonium of a fern?
A.
One
B.
Two
C.
Three
D.
Four
Ans:
One
Explanation :
Archegonium is the female reproductive organ in ferns and mosses. The upper part of the archegonium, the neck, consists of four rows of cells containing central neck cells. The uppermost of the neck cells are the neck canal cells; the lowest cell is the ventral canal cell. It has one neck canal cell with two nuclei.
[20] Medicine of Quinine is provided by -
A.
Cinchona plant
B.
Money plant
C.
Eucalyptus plants
D.
Aconite plants
Ans:
Cinchona plant
Explanation :
Quinine occurs naturally in the bark of the cinchona tree. It is a natural white crystalline alkaloid having antipyretic (fever-reducing), antimalarial, analgesic (painkilling), and anti-inflammatory properties.
[21] Process through which plants reproduce -
A.
Pollination
B.
Condensation
C.
Eating
D.
Evaporation
Ans:
Pollination
Explanation :
Pollination is the process by which pollen is transferred from the anther (male part) to the stigma (female part) of the plant, thereby enabling fertilization and reproduction. This takes place in the angiosperms, the flower bearing plants.
[22] Widal test is used for the diagnosis of -
A.
Salmonellosis
B.
Malaria
C.
Cholera
D.
Typhoid
Ans:
Typhoid
Explanation :
The Widal test is used to help make a presumptive diagnosis of enteric fever, also known as typhoid fever. Typhidot is the other test used to ascertain the diagnosis of typhoid fever.
[23] The pancreas secretes -
A.
Insulin
B.
Bile juice
C.
Peptic juice
D.
None of these
Ans:
Insulin
Explanation :
Functioning as an exocrine gland, the pancreas excretes enzymes to break down the proteins, lipids, carbohydrates, and nucleic acids in food. Functioning as an endocrine gland, the pancreas secretes the hormones insulin and glucagon to control blood sugar levels throughout the day.
[24] The endangered species are listed in what colour data book?
A.
Black
B.
Red
C.
Green -
D.
Blue
Ans:
Red
Explanation :
A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants (e, reptiles, insects, mosses).
[25] What is true about viruses without exception?
A.
They contain a core of RNA
B.
They can infect bacteria
C.
They cannot produce antibodies
D.
They can multiply only in host cells
Ans:
They can multiply only in host cells
Explanation :
Viruses do not contain enzymes for energy production or protein synthesis. For a virus to multiply, it must invade a host cell and direct the host's metabolic machinery to produce viral enzymes, viral proteins, and copies of its nucleic acid, using the host cell's ATP to power the reactions.
Explanation :
All of the above are digestive enzymes and help in the breaking down of complex food particles into simple ones. These simple particles can be easily absorbed by the blood and thus transported to all the cells of the body.
[2] Which of the following does not act both as an exocrine gland and as an endocrine gland?
A.
Pituitary
B.
Pancreas
C.
Testis
D.
Ovary
Ans:
Pituitary
Explanation :
The pancreas, located in the abdomen close to the stomach, is both an exocrine and an endocrine gland. Similarly, gonads (both ovaries and testes) are examples of organs that have both endocrine and exocrine functions. The endocrine function of the gonads is the production of the sex hormones (estrogens and androgens); while their exocrine function is to produce gametes
[3] Which of the following is/are examples for symbiotic association?
A.
Algae - lichen
B.
Plant roots - rhizobium bacteria
C.
Both are right
D.
Both are wrong
Ans:
Both are right
Explanation :
0
[4] Coupling and repulsion are the two states of -
A.
linkage
B.
chiasma
C.
mutation
D.
crossing over
Ans:
linkage
Explanation :
Genetic linkage is the tendency of genes that are located proximal to each other on a chromosome to be inherited together during meiosis. The figure below depicts the gamete composition for linked genes from coupling and repulsion crosses:
[5] Stamens are fused with each other by their anthers and also with the petals in -
A.
Leguminosae
B.
Liliaceae
C.
Compositae
D.
Euphorbiaceae
Ans:
Compositae
Explanation :
The loose union of structure of the same whorl is called cohesion, but the intimate histological union is called connation. When anthers are fused with each other, the condition is described as syngenesious e.g., Compositae, Lobeliaceae. This fusion is called cohesion. When there is fusion of stamens with petals, they are described as epipetalous e.g., Gamopetale.
[6] An organism which can monitor air pollution is -
A.
Bacteria
B.
Lichen
C.
Algae
D.
Fungi
Ans:
Lichen
Explanation :
Lichens can be used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. Air pollutants dissolved in rainwater, especially sulfur dioxide, can damage lichens, and prevent them from growing. This makes lichens natural indicators of air pollution.
[7] In the human body, which of the following organs is responsible for water balance?
A.
Heart
B.
Liver
C.
Kidneys
D.
Lungs
Ans:
Kidneys
Explanation :
The kidneys maintain our body's water balance by controlling the water concentration of blood plasma. The kidneys also control salt levels and the excretion of urea.
[8] The beetroot is the portion of the beet plant -
A.
tap root
B.
adventitious
C.
bulb of the stem
D.
rhizome
Ans:
tap root
Explanation :
The beetroot is the taproot portion of the beet plant. Beet plant it is one of several of the cultivated varieties of Beta vulgar is grown for their edible taproots and their leaves (called beet greens).
[9] Chlorophyll contains -
A.
Iron
B.
Magnesium
C.
Cobalt
D.
Zinc
Ans:
Magnesium
Explanation :
Chlorophyll molecule contains a magnesium ion. Green plants are dependent on chlorophyll for photosynthesis, and magnesium is required for chlorophyll production.
[10] Hydroponics is a method of culture of plants without using -
A.
water
B.
light
C.
sand
D.
soil
Ans:
soil
Explanation :
Hydroponics is a method of growing plants using mineral nutrient solutions, in water, without soil. Plants are grown with their roots in the mineral nutrient solution only or in an inert medium, such as perlite, gravel, mineral wool, expanded clay pebbles or coconut husk.
[11] Natural system of classification was proposed by botanists.
A.
Indian
B.
German
C.
Swedish
D.
British
Ans:
British
Explanation :
The best and a highly recognized natural system of classification were proposed by George Bentham and Sir Joseph Hooker, two great British botanists associated with Royal Botanical Garden at Kew, in their General Plantarum (1862-1883). They classified plants strictly on the basis of a natural scheme. This system is based not only on the characters of the reproductive organs and structural relationship, but all the other important characters are also taken into consideration and the plants are classified according to their related characters.
[12] The metal ion present in vitamin B12 is -
A.
cobalt
B.
zinc
C.
nickel
D.
iron
Ans:
cobalt
Explanation :
The structure of B12 is based on a corrin ring, which is similar to the porphyrin ring found in heme, chlorophyll, and cytochrome. It contains the biochemically rare element cobalt sitting in the center of the ring. Also called cobalamin, it is a water-soluble vitamin.
[13] Microbial degradation of nitrates into atmospheric nitrogen is known as-
A.
Ammonification
B.
Nitrification
C.
Denitrification
D.
Putrefaction
Ans:
Denitrification
Explanation :
Denitrification is the biological conversion of nitrate to nitrogen gas, nitric oxide or nitrous oxide. It refers to nitrate reduction by bacterial species such as Pseudomonas and Clostridium, usually in anaerobic conditions that ultimately produces molecular nitrogen (N2). These bacteria use nitrate as an electron acceptor instead of oxygen during respiration.
[14] Study of organisms in relation to their environment is called -
A.
Ecology
B.
Zoology
C.
Entomology
D.
Paiynology
Ans:
Ecology
Explanation :
Ecology is the scientific study of interactions among organisms and their environment, such as the interactions organisms have with each other and with their abiotic environment. Topics of interest to ecologists include the diversity, distribution, amount (biomass), number (population) of organisms, as well as competition between them within and among ecosystems.
[15] Crossing over takes place during which of the following stage?
A.
Leptotene
B.
Zygotene
C.
Pachytene
D.
Diplotene
Ans:
Pachytene
Explanation :
Crossing over takes place during the pachytene stage. During this stage, non-sister chromatids of homologous chromosomes may exchange segments over regions of homology. Sex chromosomes, however, are not wholly identical, and only exchange information over a small region of homology. At the sites where exchange happens, chiasmata form. The exchange of information between the non- sister chromatids results in a recombination of information; each chromosome has the complete set of information it had before, and there are no gaps formed as a result of the process. Because the chromosomes cannot be distinguished in the synaptonemal complex, the actual act of crossing over is not perceivable through the microscope, and chiasmata are not visible until the next stage.
[16] Red rot of sugarcane is caused by -
A.
Alternaria altemata
B.
Phylophthora infestans
C.
Colletotrichurn falcatum
D.
Cercospora personata
Ans:
Colletotrichurn falcatum
Explanation :
Red rot disease is caused by the fungus Glomerella tucumanensis. 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.
[17] 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.
[18] Cactus is referred to as -
A.
Hydrophyte
B.
Mesophyte
C.
Xerophyte
D.
Epiphyte
Ans:
Xerophyte
Explanation :
Cactus is a xerophyte as it specializes in surviving in hot and dry environments. Xerophytes are plants that are adapted to survive in an environment with little water, such as a desert or an ice- or snowcovered region in the Alps or the Arctic.
[19] How many neck canal cells are found in the archegonium of a fern?
A.
One
B.
Two
C.
Three
D.
Four
Ans:
One
Explanation :
Archegonium is the female reproductive organ in ferns and mosses. The upper part of the archegonium, the neck, consists of four rows of cells containing central neck cells. The uppermost of the neck cells are the neck canal cells; the lowest cell is the ventral canal cell. It has one neck canal cell with two nuclei.
[20] Medicine of Quinine is provided by -
A.
Cinchona plant
B.
Money plant
C.
Eucalyptus plants
D.
Aconite plants
Ans:
Cinchona plant
Explanation :
Quinine occurs naturally in the bark of the cinchona tree. It is a natural white crystalline alkaloid having antipyretic (fever-reducing), antimalarial, analgesic (painkilling), and anti-inflammatory properties.
[21] Process through which plants reproduce -
A.
Pollination
B.
Condensation
C.
Eating
D.
Evaporation
Ans:
Pollination
Explanation :
Pollination is the process by which pollen is transferred from the anther (male part) to the stigma (female part) of the plant, thereby enabling fertilization and reproduction. This takes place in the angiosperms, the flower bearing plants.
[22] Widal test is used for the diagnosis of -
A.
Salmonellosis
B.
Malaria
C.
Cholera
D.
Typhoid
Ans:
Typhoid
Explanation :
The Widal test is used to help make a presumptive diagnosis of enteric fever, also known as typhoid fever. Typhidot is the other test used to ascertain the diagnosis of typhoid fever.
[23] The pancreas secretes -
A.
Insulin
B.
Bile juice
C.
Peptic juice
D.
None of these
Ans:
Insulin
Explanation :
Functioning as an exocrine gland, the pancreas excretes enzymes to break down the proteins, lipids, carbohydrates, and nucleic acids in food. Functioning as an endocrine gland, the pancreas secretes the hormones insulin and glucagon to control blood sugar levels throughout the day.
[24] The endangered species are listed in what colour data book?
A.
Black
B.
Red
C.
Green -
D.
Blue
Ans:
Red
Explanation :
A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants (e, reptiles, insects, mosses).
[25] What is true about viruses without exception?
A.
They contain a core of RNA
B.
They can infect bacteria
C.
They cannot produce antibodies
D.
They can multiply only in host cells
Ans:
They can multiply only in host cells
Explanation :
Viruses do not contain enzymes for energy production or protein synthesis. For a virus to multiply, it must invade a host cell and direct the host's metabolic machinery to produce viral enzymes, viral proteins, and copies of its nucleic acid, using the host cell's ATP to power the reactions.
Explanation :
0
[4] Coupling and repulsion are the two states of -
A.
linkage
B.
chiasma
C.
mutation
D.
crossing over
Ans:
linkage
Explanation :
Genetic linkage is the tendency of genes that are located proximal to each other on a chromosome to be inherited together during meiosis. The figure below depicts the gamete composition for linked genes from coupling and repulsion crosses:
[5] Stamens are fused with each other by their anthers and also with the petals in -
A.
Leguminosae
B.
Liliaceae
C.
Compositae
D.
Euphorbiaceae
Ans:
Compositae
Explanation :
The loose union of structure of the same whorl is called cohesion, but the intimate histological union is called connation. When anthers are fused with each other, the condition is described as syngenesious e.g., Compositae, Lobeliaceae. This fusion is called cohesion. When there is fusion of stamens with petals, they are described as epipetalous e.g., Gamopetale.
[6] An organism which can monitor air pollution is -
A.
Bacteria
B.
Lichen
C.
Algae
D.
Fungi
Ans:
Lichen
Explanation :
Lichens can be used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. Air pollutants dissolved in rainwater, especially sulfur dioxide, can damage lichens, and prevent them from growing. This makes lichens natural indicators of air pollution.
[7] In the human body, which of the following organs is responsible for water balance?
A.
Heart
B.
Liver
C.
Kidneys
D.
Lungs
Ans:
Kidneys
Explanation :
The kidneys maintain our body's water balance by controlling the water concentration of blood plasma. The kidneys also control salt levels and the excretion of urea.
[8] The beetroot is the portion of the beet plant -
A.
tap root
B.
adventitious
C.
bulb of the stem
D.
rhizome
Ans:
tap root
Explanation :
The beetroot is the taproot portion of the beet plant. Beet plant it is one of several of the cultivated varieties of Beta vulgar is grown for their edible taproots and their leaves (called beet greens).
[9] Chlorophyll contains -
A.
Iron
B.
Magnesium
C.
Cobalt
D.
Zinc
Ans:
Magnesium
Explanation :
Chlorophyll molecule contains a magnesium ion. Green plants are dependent on chlorophyll for photosynthesis, and magnesium is required for chlorophyll production.
[10] Hydroponics is a method of culture of plants without using -
A.
water
B.
light
C.
sand
D.
soil
Ans:
soil
Explanation :
Hydroponics is a method of growing plants using mineral nutrient solutions, in water, without soil. Plants are grown with their roots in the mineral nutrient solution only or in an inert medium, such as perlite, gravel, mineral wool, expanded clay pebbles or coconut husk.
[11] Natural system of classification was proposed by botanists.
A.
Indian
B.
German
C.
Swedish
D.
British
Ans:
British
Explanation :
The best and a highly recognized natural system of classification were proposed by George Bentham and Sir Joseph Hooker, two great British botanists associated with Royal Botanical Garden at Kew, in their General Plantarum (1862-1883). They classified plants strictly on the basis of a natural scheme. This system is based not only on the characters of the reproductive organs and structural relationship, but all the other important characters are also taken into consideration and the plants are classified according to their related characters.
[12] The metal ion present in vitamin B12 is -
A.
cobalt
B.
zinc
C.
nickel
D.
iron
Ans:
cobalt
Explanation :
The structure of B12 is based on a corrin ring, which is similar to the porphyrin ring found in heme, chlorophyll, and cytochrome. It contains the biochemically rare element cobalt sitting in the center of the ring. Also called cobalamin, it is a water-soluble vitamin.
[13] Microbial degradation of nitrates into atmospheric nitrogen is known as-
A.
Ammonification
B.
Nitrification
C.
Denitrification
D.
Putrefaction
Ans:
Denitrification
Explanation :
Denitrification is the biological conversion of nitrate to nitrogen gas, nitric oxide or nitrous oxide. It refers to nitrate reduction by bacterial species such as Pseudomonas and Clostridium, usually in anaerobic conditions that ultimately produces molecular nitrogen (N2). These bacteria use nitrate as an electron acceptor instead of oxygen during respiration.
[14] Study of organisms in relation to their environment is called -
A.
Ecology
B.
Zoology
C.
Entomology
D.
Paiynology
Ans:
Ecology
Explanation :
Ecology is the scientific study of interactions among organisms and their environment, such as the interactions organisms have with each other and with their abiotic environment. Topics of interest to ecologists include the diversity, distribution, amount (biomass), number (population) of organisms, as well as competition between them within and among ecosystems.
[15] Crossing over takes place during which of the following stage?
A.
Leptotene
B.
Zygotene
C.
Pachytene
D.
Diplotene
Ans:
Pachytene
Explanation :
Crossing over takes place during the pachytene stage. During this stage, non-sister chromatids of homologous chromosomes may exchange segments over regions of homology. Sex chromosomes, however, are not wholly identical, and only exchange information over a small region of homology. At the sites where exchange happens, chiasmata form. The exchange of information between the non- sister chromatids results in a recombination of information; each chromosome has the complete set of information it had before, and there are no gaps formed as a result of the process. Because the chromosomes cannot be distinguished in the synaptonemal complex, the actual act of crossing over is not perceivable through the microscope, and chiasmata are not visible until the next stage.
[16] Red rot of sugarcane is caused by -
A.
Alternaria altemata
B.
Phylophthora infestans
C.
Colletotrichurn falcatum
D.
Cercospora personata
Ans:
Colletotrichurn falcatum
Explanation :
Red rot disease is caused by the fungus Glomerella tucumanensis. 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.
[17] 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.
[18] Cactus is referred to as -
A.
Hydrophyte
B.
Mesophyte
C.
Xerophyte
D.
Epiphyte
Ans:
Xerophyte
Explanation :
Cactus is a xerophyte as it specializes in surviving in hot and dry environments. Xerophytes are plants that are adapted to survive in an environment with little water, such as a desert or an ice- or snowcovered region in the Alps or the Arctic.
[19] How many neck canal cells are found in the archegonium of a fern?
A.
One
B.
Two
C.
Three
D.
Four
Ans:
One
Explanation :
Archegonium is the female reproductive organ in ferns and mosses. The upper part of the archegonium, the neck, consists of four rows of cells containing central neck cells. The uppermost of the neck cells are the neck canal cells; the lowest cell is the ventral canal cell. It has one neck canal cell with two nuclei.
[20] Medicine of Quinine is provided by -
A.
Cinchona plant
B.
Money plant
C.
Eucalyptus plants
D.
Aconite plants
Ans:
Cinchona plant
Explanation :
Quinine occurs naturally in the bark of the cinchona tree. It is a natural white crystalline alkaloid having antipyretic (fever-reducing), antimalarial, analgesic (painkilling), and anti-inflammatory properties.
[21] Process through which plants reproduce -
A.
Pollination
B.
Condensation
C.
Eating
D.
Evaporation
Ans:
Pollination
Explanation :
Pollination is the process by which pollen is transferred from the anther (male part) to the stigma (female part) of the plant, thereby enabling fertilization and reproduction. This takes place in the angiosperms, the flower bearing plants.
[22] Widal test is used for the diagnosis of -
A.
Salmonellosis
B.
Malaria
C.
Cholera
D.
Typhoid
Ans:
Typhoid
Explanation :
The Widal test is used to help make a presumptive diagnosis of enteric fever, also known as typhoid fever. Typhidot is the other test used to ascertain the diagnosis of typhoid fever.
[23] The pancreas secretes -
A.
Insulin
B.
Bile juice
C.
Peptic juice
D.
None of these
Ans:
Insulin
Explanation :
Functioning as an exocrine gland, the pancreas excretes enzymes to break down the proteins, lipids, carbohydrates, and nucleic acids in food. Functioning as an endocrine gland, the pancreas secretes the hormones insulin and glucagon to control blood sugar levels throughout the day.
[24] The endangered species are listed in what colour data book?
A.
Black
B.
Red
C.
Green -
D.
Blue
Ans:
Red
Explanation :
A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants (e, reptiles, insects, mosses).
[25] What is true about viruses without exception?
A.
They contain a core of RNA
B.
They can infect bacteria
C.
They cannot produce antibodies
D.
They can multiply only in host cells
Ans:
They can multiply only in host cells
Explanation :
Viruses do not contain enzymes for energy production or protein synthesis. For a virus to multiply, it must invade a host cell and direct the host's metabolic machinery to produce viral enzymes, viral proteins, and copies of its nucleic acid, using the host cell's ATP to power the reactions.
Explanation :
The loose union of structure of the same whorl is called cohesion, but the intimate histological union is called connation. When anthers are fused with each other, the condition is described as syngenesious e.g., Compositae, Lobeliaceae. This fusion is called cohesion. When there is fusion of stamens with petals, they are described as epipetalous e.g., Gamopetale.
[6] An organism which can monitor air pollution is -
A.
Bacteria
B.
Lichen
C.
Algae
D.
Fungi
Ans:
Lichen
Explanation :
Lichens can be used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. Air pollutants dissolved in rainwater, especially sulfur dioxide, can damage lichens, and prevent them from growing. This makes lichens natural indicators of air pollution.
[7] In the human body, which of the following organs is responsible for water balance?
A.
Heart
B.
Liver
C.
Kidneys
D.
Lungs
Ans:
Kidneys
Explanation :
The kidneys maintain our body's water balance by controlling the water concentration of blood plasma. The kidneys also control salt levels and the excretion of urea.
[8] The beetroot is the portion of the beet plant -
A.
tap root
B.
adventitious
C.
bulb of the stem
D.
rhizome
Ans:
tap root
Explanation :
The beetroot is the taproot portion of the beet plant. Beet plant it is one of several of the cultivated varieties of Beta vulgar is grown for their edible taproots and their leaves (called beet greens).
[9] Chlorophyll contains -
A.
Iron
B.
Magnesium
C.
Cobalt
D.
Zinc
Ans:
Magnesium
Explanation :
Chlorophyll molecule contains a magnesium ion. Green plants are dependent on chlorophyll for photosynthesis, and magnesium is required for chlorophyll production.
[10] Hydroponics is a method of culture of plants without using -
A.
water
B.
light
C.
sand
D.
soil
Ans:
soil
Explanation :
Hydroponics is a method of growing plants using mineral nutrient solutions, in water, without soil. Plants are grown with their roots in the mineral nutrient solution only or in an inert medium, such as perlite, gravel, mineral wool, expanded clay pebbles or coconut husk.
[11] Natural system of classification was proposed by botanists.
A.
Indian
B.
German
C.
Swedish
D.
British
Ans:
British
Explanation :
The best and a highly recognized natural system of classification were proposed by George Bentham and Sir Joseph Hooker, two great British botanists associated with Royal Botanical Garden at Kew, in their General Plantarum (1862-1883). They classified plants strictly on the basis of a natural scheme. This system is based not only on the characters of the reproductive organs and structural relationship, but all the other important characters are also taken into consideration and the plants are classified according to their related characters.
[12] The metal ion present in vitamin B12 is -
A.
cobalt
B.
zinc
C.
nickel
D.
iron
Ans:
cobalt
Explanation :
The structure of B12 is based on a corrin ring, which is similar to the porphyrin ring found in heme, chlorophyll, and cytochrome. It contains the biochemically rare element cobalt sitting in the center of the ring. Also called cobalamin, it is a water-soluble vitamin.
[13] Microbial degradation of nitrates into atmospheric nitrogen is known as-
A.
Ammonification
B.
Nitrification
C.
Denitrification
D.
Putrefaction
Ans:
Denitrification
Explanation :
Denitrification is the biological conversion of nitrate to nitrogen gas, nitric oxide or nitrous oxide. It refers to nitrate reduction by bacterial species such as Pseudomonas and Clostridium, usually in anaerobic conditions that ultimately produces molecular nitrogen (N2). These bacteria use nitrate as an electron acceptor instead of oxygen during respiration.
[14] Study of organisms in relation to their environment is called -
A.
Ecology
B.
Zoology
C.
Entomology
D.
Paiynology
Ans:
Ecology
Explanation :
Ecology is the scientific study of interactions among organisms and their environment, such as the interactions organisms have with each other and with their abiotic environment. Topics of interest to ecologists include the diversity, distribution, amount (biomass), number (population) of organisms, as well as competition between them within and among ecosystems.
[15] Crossing over takes place during which of the following stage?
A.
Leptotene
B.
Zygotene
C.
Pachytene
D.
Diplotene
Ans:
Pachytene
Explanation :
Crossing over takes place during the pachytene stage. During this stage, non-sister chromatids of homologous chromosomes may exchange segments over regions of homology. Sex chromosomes, however, are not wholly identical, and only exchange information over a small region of homology. At the sites where exchange happens, chiasmata form. The exchange of information between the non- sister chromatids results in a recombination of information; each chromosome has the complete set of information it had before, and there are no gaps formed as a result of the process. Because the chromosomes cannot be distinguished in the synaptonemal complex, the actual act of crossing over is not perceivable through the microscope, and chiasmata are not visible until the next stage.
[16] Red rot of sugarcane is caused by -
A.
Alternaria altemata
B.
Phylophthora infestans
C.
Colletotrichurn falcatum
D.
Cercospora personata
Ans:
Colletotrichurn falcatum
Explanation :
Red rot disease is caused by the fungus Glomerella tucumanensis. 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.
[17] 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.
[18] Cactus is referred to as -
A.
Hydrophyte
B.
Mesophyte
C.
Xerophyte
D.
Epiphyte
Ans:
Xerophyte
Explanation :
Cactus is a xerophyte as it specializes in surviving in hot and dry environments. Xerophytes are plants that are adapted to survive in an environment with little water, such as a desert or an ice- or snowcovered region in the Alps or the Arctic.
[19] How many neck canal cells are found in the archegonium of a fern?
A.
One
B.
Two
C.
Three
D.
Four
Ans:
One
Explanation :
Archegonium is the female reproductive organ in ferns and mosses. The upper part of the archegonium, the neck, consists of four rows of cells containing central neck cells. The uppermost of the neck cells are the neck canal cells; the lowest cell is the ventral canal cell. It has one neck canal cell with two nuclei.
[20] Medicine of Quinine is provided by -
A.
Cinchona plant
B.
Money plant
C.
Eucalyptus plants
D.
Aconite plants
Ans:
Cinchona plant
Explanation :
Quinine occurs naturally in the bark of the cinchona tree. It is a natural white crystalline alkaloid having antipyretic (fever-reducing), antimalarial, analgesic (painkilling), and anti-inflammatory properties.
[21] Process through which plants reproduce -
A.
Pollination
B.
Condensation
C.
Eating
D.
Evaporation
Ans:
Pollination
Explanation :
Pollination is the process by which pollen is transferred from the anther (male part) to the stigma (female part) of the plant, thereby enabling fertilization and reproduction. This takes place in the angiosperms, the flower bearing plants.
[22] Widal test is used for the diagnosis of -
A.
Salmonellosis
B.
Malaria
C.
Cholera
D.
Typhoid
Ans:
Typhoid
Explanation :
The Widal test is used to help make a presumptive diagnosis of enteric fever, also known as typhoid fever. Typhidot is the other test used to ascertain the diagnosis of typhoid fever.
[23] The pancreas secretes -
A.
Insulin
B.
Bile juice
C.
Peptic juice
D.
None of these
Ans:
Insulin
Explanation :
Functioning as an exocrine gland, the pancreas excretes enzymes to break down the proteins, lipids, carbohydrates, and nucleic acids in food. Functioning as an endocrine gland, the pancreas secretes the hormones insulin and glucagon to control blood sugar levels throughout the day.
[24] The endangered species are listed in what colour data book?
A.
Black
B.
Red
C.
Green -
D.
Blue
Ans:
Red
Explanation :
A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants (e, reptiles, insects, mosses).
[25] What is true about viruses without exception?
A.
They contain a core of RNA
B.
They can infect bacteria
C.
They cannot produce antibodies
D.
They can multiply only in host cells
Ans:
They can multiply only in host cells
Explanation :
Viruses do not contain enzymes for energy production or protein synthesis. For a virus to multiply, it must invade a host cell and direct the host's metabolic machinery to produce viral enzymes, viral proteins, and copies of its nucleic acid, using the host cell's ATP to power the reactions.
Explanation :
The kidneys maintain our body's water balance by controlling the water concentration of blood plasma. The kidneys also control salt levels and the excretion of urea.
[8] The beetroot is the portion of the beet plant -
A.
tap root
B.
adventitious
C.
bulb of the stem
D.
rhizome
Ans:
tap root
Explanation :
The beetroot is the taproot portion of the beet plant. Beet plant it is one of several of the cultivated varieties of Beta vulgar is grown for their edible taproots and their leaves (called beet greens).
[9] Chlorophyll contains -
A.
Iron
B.
Magnesium
C.
Cobalt
D.
Zinc
Ans:
Magnesium
Explanation :
Chlorophyll molecule contains a magnesium ion. Green plants are dependent on chlorophyll for photosynthesis, and magnesium is required for chlorophyll production.
[10] Hydroponics is a method of culture of plants without using -
A.
water
B.
light
C.
sand
D.
soil
Ans:
soil
Explanation :
Hydroponics is a method of growing plants using mineral nutrient solutions, in water, without soil. Plants are grown with their roots in the mineral nutrient solution only or in an inert medium, such as perlite, gravel, mineral wool, expanded clay pebbles or coconut husk.
[11] Natural system of classification was proposed by botanists.
A.
Indian
B.
German
C.
Swedish
D.
British
Ans:
British
Explanation :
The best and a highly recognized natural system of classification were proposed by George Bentham and Sir Joseph Hooker, two great British botanists associated with Royal Botanical Garden at Kew, in their General Plantarum (1862-1883). They classified plants strictly on the basis of a natural scheme. This system is based not only on the characters of the reproductive organs and structural relationship, but all the other important characters are also taken into consideration and the plants are classified according to their related characters.
[12] The metal ion present in vitamin B12 is -
A.
cobalt
B.
zinc
C.
nickel
D.
iron
Ans:
cobalt
Explanation :
The structure of B12 is based on a corrin ring, which is similar to the porphyrin ring found in heme, chlorophyll, and cytochrome. It contains the biochemically rare element cobalt sitting in the center of the ring. Also called cobalamin, it is a water-soluble vitamin.
[13] Microbial degradation of nitrates into atmospheric nitrogen is known as-
A.
Ammonification
B.
Nitrification
C.
Denitrification
D.
Putrefaction
Ans:
Denitrification
Explanation :
Denitrification is the biological conversion of nitrate to nitrogen gas, nitric oxide or nitrous oxide. It refers to nitrate reduction by bacterial species such as Pseudomonas and Clostridium, usually in anaerobic conditions that ultimately produces molecular nitrogen (N2). These bacteria use nitrate as an electron acceptor instead of oxygen during respiration.
[14] Study of organisms in relation to their environment is called -
A.
Ecology
B.
Zoology
C.
Entomology
D.
Paiynology
Ans:
Ecology
Explanation :
Ecology is the scientific study of interactions among organisms and their environment, such as the interactions organisms have with each other and with their abiotic environment. Topics of interest to ecologists include the diversity, distribution, amount (biomass), number (population) of organisms, as well as competition between them within and among ecosystems.
[15] Crossing over takes place during which of the following stage?
A.
Leptotene
B.
Zygotene
C.
Pachytene
D.
Diplotene
Ans:
Pachytene
Explanation :
Crossing over takes place during the pachytene stage. During this stage, non-sister chromatids of homologous chromosomes may exchange segments over regions of homology. Sex chromosomes, however, are not wholly identical, and only exchange information over a small region of homology. At the sites where exchange happens, chiasmata form. The exchange of information between the non- sister chromatids results in a recombination of information; each chromosome has the complete set of information it had before, and there are no gaps formed as a result of the process. Because the chromosomes cannot be distinguished in the synaptonemal complex, the actual act of crossing over is not perceivable through the microscope, and chiasmata are not visible until the next stage.
[16] Red rot of sugarcane is caused by -
A.
Alternaria altemata
B.
Phylophthora infestans
C.
Colletotrichurn falcatum
D.
Cercospora personata
Ans:
Colletotrichurn falcatum
Explanation :
Red rot disease is caused by the fungus Glomerella tucumanensis. 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.
[17] 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.
[18] Cactus is referred to as -
A.
Hydrophyte
B.
Mesophyte
C.
Xerophyte
D.
Epiphyte
Ans:
Xerophyte
Explanation :
Cactus is a xerophyte as it specializes in surviving in hot and dry environments. Xerophytes are plants that are adapted to survive in an environment with little water, such as a desert or an ice- or snowcovered region in the Alps or the Arctic.
[19] How many neck canal cells are found in the archegonium of a fern?
A.
One
B.
Two
C.
Three
D.
Four
Ans:
One
Explanation :
Archegonium is the female reproductive organ in ferns and mosses. The upper part of the archegonium, the neck, consists of four rows of cells containing central neck cells. The uppermost of the neck cells are the neck canal cells; the lowest cell is the ventral canal cell. It has one neck canal cell with two nuclei.
[20] Medicine of Quinine is provided by -
A.
Cinchona plant
B.
Money plant
C.
Eucalyptus plants
D.
Aconite plants
Ans:
Cinchona plant
Explanation :
Quinine occurs naturally in the bark of the cinchona tree. It is a natural white crystalline alkaloid having antipyretic (fever-reducing), antimalarial, analgesic (painkilling), and anti-inflammatory properties.
[21] Process through which plants reproduce -
A.
Pollination
B.
Condensation
C.
Eating
D.
Evaporation
Ans:
Pollination
Explanation :
Pollination is the process by which pollen is transferred from the anther (male part) to the stigma (female part) of the plant, thereby enabling fertilization and reproduction. This takes place in the angiosperms, the flower bearing plants.
[22] Widal test is used for the diagnosis of -
A.
Salmonellosis
B.
Malaria
C.
Cholera
D.
Typhoid
Ans:
Typhoid
Explanation :
The Widal test is used to help make a presumptive diagnosis of enteric fever, also known as typhoid fever. Typhidot is the other test used to ascertain the diagnosis of typhoid fever.
[23] The pancreas secretes -
A.
Insulin
B.
Bile juice
C.
Peptic juice
D.
None of these
Ans:
Insulin
Explanation :
Functioning as an exocrine gland, the pancreas excretes enzymes to break down the proteins, lipids, carbohydrates, and nucleic acids in food. Functioning as an endocrine gland, the pancreas secretes the hormones insulin and glucagon to control blood sugar levels throughout the day.
[24] The endangered species are listed in what colour data book?
A.
Black
B.
Red
C.
Green -
D.
Blue
Ans:
Red
Explanation :
A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants (e, reptiles, insects, mosses).
[25] What is true about viruses without exception?
A.
They contain a core of RNA
B.
They can infect bacteria
C.
They cannot produce antibodies
D.
They can multiply only in host cells
Ans:
They can multiply only in host cells
Explanation :
Viruses do not contain enzymes for energy production or protein synthesis. For a virus to multiply, it must invade a host cell and direct the host's metabolic machinery to produce viral enzymes, viral proteins, and copies of its nucleic acid, using the host cell's ATP to power the reactions.
Explanation :
Chlorophyll molecule contains a magnesium ion. Green plants are dependent on chlorophyll for photosynthesis, and magnesium is required for chlorophyll production.
[10] Hydroponics is a method of culture of plants without using -
A.
water
B.
light
C.
sand
D.
soil
Ans:
soil
Explanation :
Hydroponics is a method of growing plants using mineral nutrient solutions, in water, without soil. Plants are grown with their roots in the mineral nutrient solution only or in an inert medium, such as perlite, gravel, mineral wool, expanded clay pebbles or coconut husk.
[11] Natural system of classification was proposed by botanists.
A.
Indian
B.
German
C.
Swedish
D.
British
Ans:
British
Explanation :
The best and a highly recognized natural system of classification were proposed by George Bentham and Sir Joseph Hooker, two great British botanists associated with Royal Botanical Garden at Kew, in their General Plantarum (1862-1883). They classified plants strictly on the basis of a natural scheme. This system is based not only on the characters of the reproductive organs and structural relationship, but all the other important characters are also taken into consideration and the plants are classified according to their related characters.
[12] The metal ion present in vitamin B12 is -
A.
cobalt
B.
zinc
C.
nickel
D.
iron
Ans:
cobalt
Explanation :
The structure of B12 is based on a corrin ring, which is similar to the porphyrin ring found in heme, chlorophyll, and cytochrome. It contains the biochemically rare element cobalt sitting in the center of the ring. Also called cobalamin, it is a water-soluble vitamin.
[13] Microbial degradation of nitrates into atmospheric nitrogen is known as-
A.
Ammonification
B.
Nitrification
C.
Denitrification
D.
Putrefaction
Ans:
Denitrification
Explanation :
Denitrification is the biological conversion of nitrate to nitrogen gas, nitric oxide or nitrous oxide. It refers to nitrate reduction by bacterial species such as Pseudomonas and Clostridium, usually in anaerobic conditions that ultimately produces molecular nitrogen (N2). These bacteria use nitrate as an electron acceptor instead of oxygen during respiration.
[14] Study of organisms in relation to their environment is called -
A.
Ecology
B.
Zoology
C.
Entomology
D.
Paiynology
Ans:
Ecology
Explanation :
Ecology is the scientific study of interactions among organisms and their environment, such as the interactions organisms have with each other and with their abiotic environment. Topics of interest to ecologists include the diversity, distribution, amount (biomass), number (population) of organisms, as well as competition between them within and among ecosystems.
[15] Crossing over takes place during which of the following stage?
A.
Leptotene
B.
Zygotene
C.
Pachytene
D.
Diplotene
Ans:
Pachytene
Explanation :
Crossing over takes place during the pachytene stage. During this stage, non-sister chromatids of homologous chromosomes may exchange segments over regions of homology. Sex chromosomes, however, are not wholly identical, and only exchange information over a small region of homology. At the sites where exchange happens, chiasmata form. The exchange of information between the non- sister chromatids results in a recombination of information; each chromosome has the complete set of information it had before, and there are no gaps formed as a result of the process. Because the chromosomes cannot be distinguished in the synaptonemal complex, the actual act of crossing over is not perceivable through the microscope, and chiasmata are not visible until the next stage.
[16] Red rot of sugarcane is caused by -
A.
Alternaria altemata
B.
Phylophthora infestans
C.
Colletotrichurn falcatum
D.
Cercospora personata
Ans:
Colletotrichurn falcatum
Explanation :
Red rot disease is caused by the fungus Glomerella tucumanensis. 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.
[17] 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.
[18] Cactus is referred to as -
A.
Hydrophyte
B.
Mesophyte
C.
Xerophyte
D.
Epiphyte
Ans:
Xerophyte
Explanation :
Cactus is a xerophyte as it specializes in surviving in hot and dry environments. Xerophytes are plants that are adapted to survive in an environment with little water, such as a desert or an ice- or snowcovered region in the Alps or the Arctic.
[19] How many neck canal cells are found in the archegonium of a fern?
A.
One
B.
Two
C.
Three
D.
Four
Ans:
One
Explanation :
Archegonium is the female reproductive organ in ferns and mosses. The upper part of the archegonium, the neck, consists of four rows of cells containing central neck cells. The uppermost of the neck cells are the neck canal cells; the lowest cell is the ventral canal cell. It has one neck canal cell with two nuclei.
[20] Medicine of Quinine is provided by -
A.
Cinchona plant
B.
Money plant
C.
Eucalyptus plants
D.
Aconite plants
Ans:
Cinchona plant
Explanation :
Quinine occurs naturally in the bark of the cinchona tree. It is a natural white crystalline alkaloid having antipyretic (fever-reducing), antimalarial, analgesic (painkilling), and anti-inflammatory properties.
[21] Process through which plants reproduce -
A.
Pollination
B.
Condensation
C.
Eating
D.
Evaporation
Ans:
Pollination
Explanation :
Pollination is the process by which pollen is transferred from the anther (male part) to the stigma (female part) of the plant, thereby enabling fertilization and reproduction. This takes place in the angiosperms, the flower bearing plants.
[22] Widal test is used for the diagnosis of -
A.
Salmonellosis
B.
Malaria
C.
Cholera
D.
Typhoid
Ans:
Typhoid
Explanation :
The Widal test is used to help make a presumptive diagnosis of enteric fever, also known as typhoid fever. Typhidot is the other test used to ascertain the diagnosis of typhoid fever.
[23] The pancreas secretes -
A.
Insulin
B.
Bile juice
C.
Peptic juice
D.
None of these
Ans:
Insulin
Explanation :
Functioning as an exocrine gland, the pancreas excretes enzymes to break down the proteins, lipids, carbohydrates, and nucleic acids in food. Functioning as an endocrine gland, the pancreas secretes the hormones insulin and glucagon to control blood sugar levels throughout the day.
[24] The endangered species are listed in what colour data book?
A.
Black
B.
Red
C.
Green -
D.
Blue
Ans:
Red
Explanation :
A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants (e, reptiles, insects, mosses).
[25] What is true about viruses without exception?
A.
They contain a core of RNA
B.
They can infect bacteria
C.
They cannot produce antibodies
D.
They can multiply only in host cells
Ans:
They can multiply only in host cells
Explanation :
Viruses do not contain enzymes for energy production or protein synthesis. For a virus to multiply, it must invade a host cell and direct the host's metabolic machinery to produce viral enzymes, viral proteins, and copies of its nucleic acid, using the host cell's ATP to power the reactions.
Explanation :
The best and a highly recognized natural system of classification were proposed by George Bentham and Sir Joseph Hooker, two great British botanists associated with Royal Botanical Garden at Kew, in their General Plantarum (1862-1883). They classified plants strictly on the basis of a natural scheme. This system is based not only on the characters of the reproductive organs and structural relationship, but all the other important characters are also taken into consideration and the plants are classified according to their related characters.
[12] The metal ion present in vitamin B12 is -
A.
cobalt
B.
zinc
C.
nickel
D.
iron
Ans:
cobalt
Explanation :
The structure of B12 is based on a corrin ring, which is similar to the porphyrin ring found in heme, chlorophyll, and cytochrome. It contains the biochemically rare element cobalt sitting in the center of the ring. Also called cobalamin, it is a water-soluble vitamin.
[13] Microbial degradation of nitrates into atmospheric nitrogen is known as-
A.
Ammonification
B.
Nitrification
C.
Denitrification
D.
Putrefaction
Ans:
Denitrification
Explanation :
Denitrification is the biological conversion of nitrate to nitrogen gas, nitric oxide or nitrous oxide. It refers to nitrate reduction by bacterial species such as Pseudomonas and Clostridium, usually in anaerobic conditions that ultimately produces molecular nitrogen (N2). These bacteria use nitrate as an electron acceptor instead of oxygen during respiration.
[14] Study of organisms in relation to their environment is called -
A.
Ecology
B.
Zoology
C.
Entomology
D.
Paiynology
Ans:
Ecology
Explanation :
Ecology is the scientific study of interactions among organisms and their environment, such as the interactions organisms have with each other and with their abiotic environment. Topics of interest to ecologists include the diversity, distribution, amount (biomass), number (population) of organisms, as well as competition between them within and among ecosystems.
[15] Crossing over takes place during which of the following stage?
A.
Leptotene
B.
Zygotene
C.
Pachytene
D.
Diplotene
Ans:
Pachytene
Explanation :
Crossing over takes place during the pachytene stage. During this stage, non-sister chromatids of homologous chromosomes may exchange segments over regions of homology. Sex chromosomes, however, are not wholly identical, and only exchange information over a small region of homology. At the sites where exchange happens, chiasmata form. The exchange of information between the non- sister chromatids results in a recombination of information; each chromosome has the complete set of information it had before, and there are no gaps formed as a result of the process. Because the chromosomes cannot be distinguished in the synaptonemal complex, the actual act of crossing over is not perceivable through the microscope, and chiasmata are not visible until the next stage.
[16] Red rot of sugarcane is caused by -
A.
Alternaria altemata
B.
Phylophthora infestans
C.
Colletotrichurn falcatum
D.
Cercospora personata
Ans:
Colletotrichurn falcatum
Explanation :
Red rot disease is caused by the fungus Glomerella tucumanensis. 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.
[17] 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.
[18] Cactus is referred to as -
A.
Hydrophyte
B.
Mesophyte
C.
Xerophyte
D.
Epiphyte
Ans:
Xerophyte
Explanation :
Cactus is a xerophyte as it specializes in surviving in hot and dry environments. Xerophytes are plants that are adapted to survive in an environment with little water, such as a desert or an ice- or snowcovered region in the Alps or the Arctic.
[19] How many neck canal cells are found in the archegonium of a fern?
A.
One
B.
Two
C.
Three
D.
Four
Ans:
One
Explanation :
Archegonium is the female reproductive organ in ferns and mosses. The upper part of the archegonium, the neck, consists of four rows of cells containing central neck cells. The uppermost of the neck cells are the neck canal cells; the lowest cell is the ventral canal cell. It has one neck canal cell with two nuclei.
[20] Medicine of Quinine is provided by -
A.
Cinchona plant
B.
Money plant
C.
Eucalyptus plants
D.
Aconite plants
Ans:
Cinchona plant
Explanation :
Quinine occurs naturally in the bark of the cinchona tree. It is a natural white crystalline alkaloid having antipyretic (fever-reducing), antimalarial, analgesic (painkilling), and anti-inflammatory properties.
[21] Process through which plants reproduce -
A.
Pollination
B.
Condensation
C.
Eating
D.
Evaporation
Ans:
Pollination
Explanation :
Pollination is the process by which pollen is transferred from the anther (male part) to the stigma (female part) of the plant, thereby enabling fertilization and reproduction. This takes place in the angiosperms, the flower bearing plants.
[22] Widal test is used for the diagnosis of -
A.
Salmonellosis
B.
Malaria
C.
Cholera
D.
Typhoid
Ans:
Typhoid
Explanation :
The Widal test is used to help make a presumptive diagnosis of enteric fever, also known as typhoid fever. Typhidot is the other test used to ascertain the diagnosis of typhoid fever.
[23] The pancreas secretes -
A.
Insulin
B.
Bile juice
C.
Peptic juice
D.
None of these
Ans:
Insulin
Explanation :
Functioning as an exocrine gland, the pancreas excretes enzymes to break down the proteins, lipids, carbohydrates, and nucleic acids in food. Functioning as an endocrine gland, the pancreas secretes the hormones insulin and glucagon to control blood sugar levels throughout the day.
[24] The endangered species are listed in what colour data book?
A.
Black
B.
Red
C.
Green -
D.
Blue
Ans:
Red
Explanation :
A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants (e, reptiles, insects, mosses).
[25] What is true about viruses without exception?
A.
They contain a core of RNA
B.
They can infect bacteria
C.
They cannot produce antibodies
D.
They can multiply only in host cells
Ans:
They can multiply only in host cells
Explanation :
Viruses do not contain enzymes for energy production or protein synthesis. For a virus to multiply, it must invade a host cell and direct the host's metabolic machinery to produce viral enzymes, viral proteins, and copies of its nucleic acid, using the host cell's ATP to power the reactions.
Explanation :
Denitrification is the biological conversion of nitrate to nitrogen gas, nitric oxide or nitrous oxide. It refers to nitrate reduction by bacterial species such as Pseudomonas and Clostridium, usually in anaerobic conditions that ultimately produces molecular nitrogen (N2). These bacteria use nitrate as an electron acceptor instead of oxygen during respiration.
[14] Study of organisms in relation to their environment is called -
A.
Ecology
B.
Zoology
C.
Entomology
D.
Paiynology
Ans:
Ecology
Explanation :
Ecology is the scientific study of interactions among organisms and their environment, such as the interactions organisms have with each other and with their abiotic environment. Topics of interest to ecologists include the diversity, distribution, amount (biomass), number (population) of organisms, as well as competition between them within and among ecosystems.
[15] Crossing over takes place during which of the following stage?
A.
Leptotene
B.
Zygotene
C.
Pachytene
D.
Diplotene
Ans:
Pachytene
Explanation :
Crossing over takes place during the pachytene stage. During this stage, non-sister chromatids of homologous chromosomes may exchange segments over regions of homology. Sex chromosomes, however, are not wholly identical, and only exchange information over a small region of homology. At the sites where exchange happens, chiasmata form. The exchange of information between the non- sister chromatids results in a recombination of information; each chromosome has the complete set of information it had before, and there are no gaps formed as a result of the process. Because the chromosomes cannot be distinguished in the synaptonemal complex, the actual act of crossing over is not perceivable through the microscope, and chiasmata are not visible until the next stage.
[16] Red rot of sugarcane is caused by -
A.
Alternaria altemata
B.
Phylophthora infestans
C.
Colletotrichurn falcatum
D.
Cercospora personata
Ans:
Colletotrichurn falcatum
Explanation :
Red rot disease is caused by the fungus Glomerella tucumanensis. 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.
[17] 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.
[18] Cactus is referred to as -
A.
Hydrophyte
B.
Mesophyte
C.
Xerophyte
D.
Epiphyte
Ans:
Xerophyte
Explanation :
Cactus is a xerophyte as it specializes in surviving in hot and dry environments. Xerophytes are plants that are adapted to survive in an environment with little water, such as a desert or an ice- or snowcovered region in the Alps or the Arctic.
[19] How many neck canal cells are found in the archegonium of a fern?
A.
One
B.
Two
C.
Three
D.
Four
Ans:
One
Explanation :
Archegonium is the female reproductive organ in ferns and mosses. The upper part of the archegonium, the neck, consists of four rows of cells containing central neck cells. The uppermost of the neck cells are the neck canal cells; the lowest cell is the ventral canal cell. It has one neck canal cell with two nuclei.
[20] Medicine of Quinine is provided by -
A.
Cinchona plant
B.
Money plant
C.
Eucalyptus plants
D.
Aconite plants
Ans:
Cinchona plant
Explanation :
Quinine occurs naturally in the bark of the cinchona tree. It is a natural white crystalline alkaloid having antipyretic (fever-reducing), antimalarial, analgesic (painkilling), and anti-inflammatory properties.
[21] Process through which plants reproduce -
A.
Pollination
B.
Condensation
C.
Eating
D.
Evaporation
Ans:
Pollination
Explanation :
Pollination is the process by which pollen is transferred from the anther (male part) to the stigma (female part) of the plant, thereby enabling fertilization and reproduction. This takes place in the angiosperms, the flower bearing plants.
[22] Widal test is used for the diagnosis of -
A.
Salmonellosis
B.
Malaria
C.
Cholera
D.
Typhoid
Ans:
Typhoid
Explanation :
The Widal test is used to help make a presumptive diagnosis of enteric fever, also known as typhoid fever. Typhidot is the other test used to ascertain the diagnosis of typhoid fever.
[23] The pancreas secretes -
A.
Insulin
B.
Bile juice
C.
Peptic juice
D.
None of these
Ans:
Insulin
Explanation :
Functioning as an exocrine gland, the pancreas excretes enzymes to break down the proteins, lipids, carbohydrates, and nucleic acids in food. Functioning as an endocrine gland, the pancreas secretes the hormones insulin and glucagon to control blood sugar levels throughout the day.
[24] The endangered species are listed in what colour data book?
A.
Black
B.
Red
C.
Green -
D.
Blue
Ans:
Red
Explanation :
A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants (e, reptiles, insects, mosses).
[25] What is true about viruses without exception?
A.
They contain a core of RNA
B.
They can infect bacteria
C.
They cannot produce antibodies
D.
They can multiply only in host cells
Ans:
They can multiply only in host cells
Explanation :
Viruses do not contain enzymes for energy production or protein synthesis. For a virus to multiply, it must invade a host cell and direct the host's metabolic machinery to produce viral enzymes, viral proteins, and copies of its nucleic acid, using the host cell's ATP to power the reactions.
Explanation :
Crossing over takes place during the pachytene stage. During this stage, non-sister chromatids of homologous chromosomes may exchange segments over regions of homology. Sex chromosomes, however, are not wholly identical, and only exchange information over a small region of homology. At the sites where exchange happens, chiasmata form. The exchange of information between the non- sister chromatids results in a recombination of information; each chromosome has the complete set of information it had before, and there are no gaps formed as a result of the process. Because the chromosomes cannot be distinguished in the synaptonemal complex, the actual act of crossing over is not perceivable through the microscope, and chiasmata are not visible until the next stage.
[16] Red rot of sugarcane is caused by -
A.
Alternaria altemata
B.
Phylophthora infestans
C.
Colletotrichurn falcatum
D.
Cercospora personata
Ans:
Colletotrichurn falcatum
Explanation :
Red rot disease is caused by the fungus Glomerella tucumanensis. 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.
[17] 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.
[18] Cactus is referred to as -
A.
Hydrophyte
B.
Mesophyte
C.
Xerophyte
D.
Epiphyte
Ans:
Xerophyte
Explanation :
Cactus is a xerophyte as it specializes in surviving in hot and dry environments. Xerophytes are plants that are adapted to survive in an environment with little water, such as a desert or an ice- or snowcovered region in the Alps or the Arctic.
[19] How many neck canal cells are found in the archegonium of a fern?
A.
One
B.
Two
C.
Three
D.
Four
Ans:
One
Explanation :
Archegonium is the female reproductive organ in ferns and mosses. The upper part of the archegonium, the neck, consists of four rows of cells containing central neck cells. The uppermost of the neck cells are the neck canal cells; the lowest cell is the ventral canal cell. It has one neck canal cell with two nuclei.
[20] Medicine of Quinine is provided by -
A.
Cinchona plant
B.
Money plant
C.
Eucalyptus plants
D.
Aconite plants
Ans:
Cinchona plant
Explanation :
Quinine occurs naturally in the bark of the cinchona tree. It is a natural white crystalline alkaloid having antipyretic (fever-reducing), antimalarial, analgesic (painkilling), and anti-inflammatory properties.
[21] Process through which plants reproduce -
A.
Pollination
B.
Condensation
C.
Eating
D.
Evaporation
Ans:
Pollination
Explanation :
Pollination is the process by which pollen is transferred from the anther (male part) to the stigma (female part) of the plant, thereby enabling fertilization and reproduction. This takes place in the angiosperms, the flower bearing plants.
[22] Widal test is used for the diagnosis of -
A.
Salmonellosis
B.
Malaria
C.
Cholera
D.
Typhoid
Ans:
Typhoid
Explanation :
The Widal test is used to help make a presumptive diagnosis of enteric fever, also known as typhoid fever. Typhidot is the other test used to ascertain the diagnosis of typhoid fever.
[23] The pancreas secretes -
A.
Insulin
B.
Bile juice
C.
Peptic juice
D.
None of these
Ans:
Insulin
Explanation :
Functioning as an exocrine gland, the pancreas excretes enzymes to break down the proteins, lipids, carbohydrates, and nucleic acids in food. Functioning as an endocrine gland, the pancreas secretes the hormones insulin and glucagon to control blood sugar levels throughout the day.
[24] The endangered species are listed in what colour data book?
A.
Black
B.
Red
C.
Green -
D.
Blue
Ans:
Red
Explanation :
A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants (e, reptiles, insects, mosses).
[25] What is true about viruses without exception?
A.
They contain a core of RNA
B.
They can infect bacteria
C.
They cannot produce antibodies
D.
They can multiply only in host cells
Ans:
They can multiply only in host cells
Explanation :
Viruses do not contain enzymes for energy production or protein synthesis. For a virus to multiply, it must invade a host cell and direct the host's metabolic machinery to produce viral enzymes, viral proteins, and copies of its nucleic acid, using the host cell's ATP to power the reactions.
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.
[18] Cactus is referred to as -
A.
Hydrophyte
B.
Mesophyte
C.
Xerophyte
D.
Epiphyte
Ans:
Xerophyte
Explanation :
Cactus is a xerophyte as it specializes in surviving in hot and dry environments. Xerophytes are plants that are adapted to survive in an environment with little water, such as a desert or an ice- or snowcovered region in the Alps or the Arctic.
[19] How many neck canal cells are found in the archegonium of a fern?
A.
One
B.
Two
C.
Three
D.
Four
Ans:
One
Explanation :
Archegonium is the female reproductive organ in ferns and mosses. The upper part of the archegonium, the neck, consists of four rows of cells containing central neck cells. The uppermost of the neck cells are the neck canal cells; the lowest cell is the ventral canal cell. It has one neck canal cell with two nuclei.
[20] Medicine of Quinine is provided by -
A.
Cinchona plant
B.
Money plant
C.
Eucalyptus plants
D.
Aconite plants
Ans:
Cinchona plant
Explanation :
Quinine occurs naturally in the bark of the cinchona tree. It is a natural white crystalline alkaloid having antipyretic (fever-reducing), antimalarial, analgesic (painkilling), and anti-inflammatory properties.
[21] Process through which plants reproduce -
A.
Pollination
B.
Condensation
C.
Eating
D.
Evaporation
Ans:
Pollination
Explanation :
Pollination is the process by which pollen is transferred from the anther (male part) to the stigma (female part) of the plant, thereby enabling fertilization and reproduction. This takes place in the angiosperms, the flower bearing plants.
[22] Widal test is used for the diagnosis of -
A.
Salmonellosis
B.
Malaria
C.
Cholera
D.
Typhoid
Ans:
Typhoid
Explanation :
The Widal test is used to help make a presumptive diagnosis of enteric fever, also known as typhoid fever. Typhidot is the other test used to ascertain the diagnosis of typhoid fever.
[23] The pancreas secretes -
A.
Insulin
B.
Bile juice
C.
Peptic juice
D.
None of these
Ans:
Insulin
Explanation :
Functioning as an exocrine gland, the pancreas excretes enzymes to break down the proteins, lipids, carbohydrates, and nucleic acids in food. Functioning as an endocrine gland, the pancreas secretes the hormones insulin and glucagon to control blood sugar levels throughout the day.
[24] The endangered species are listed in what colour data book?
A.
Black
B.
Red
C.
Green -
D.
Blue
Ans:
Red
Explanation :
A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants (e, reptiles, insects, mosses).
[25] What is true about viruses without exception?
A.
They contain a core of RNA
B.
They can infect bacteria
C.
They cannot produce antibodies
D.
They can multiply only in host cells
Ans:
They can multiply only in host cells
Explanation :
Viruses do not contain enzymes for energy production or protein synthesis. For a virus to multiply, it must invade a host cell and direct the host's metabolic machinery to produce viral enzymes, viral proteins, and copies of its nucleic acid, using the host cell's ATP to power the reactions.
Explanation :
Archegonium is the female reproductive organ in ferns and mosses. The upper part of the archegonium, the neck, consists of four rows of cells containing central neck cells. The uppermost of the neck cells are the neck canal cells; the lowest cell is the ventral canal cell. It has one neck canal cell with two nuclei.
[20] Medicine of Quinine is provided by -
A.
Cinchona plant
B.
Money plant
C.
Eucalyptus plants
D.
Aconite plants
Ans:
Cinchona plant
Explanation :
Quinine occurs naturally in the bark of the cinchona tree. It is a natural white crystalline alkaloid having antipyretic (fever-reducing), antimalarial, analgesic (painkilling), and anti-inflammatory properties.
[21] Process through which plants reproduce -
A.
Pollination
B.
Condensation
C.
Eating
D.
Evaporation
Ans:
Pollination
Explanation :
Pollination is the process by which pollen is transferred from the anther (male part) to the stigma (female part) of the plant, thereby enabling fertilization and reproduction. This takes place in the angiosperms, the flower bearing plants.
[22] Widal test is used for the diagnosis of -
A.
Salmonellosis
B.
Malaria
C.
Cholera
D.
Typhoid
Ans:
Typhoid
Explanation :
The Widal test is used to help make a presumptive diagnosis of enteric fever, also known as typhoid fever. Typhidot is the other test used to ascertain the diagnosis of typhoid fever.
[23] The pancreas secretes -
A.
Insulin
B.
Bile juice
C.
Peptic juice
D.
None of these
Ans:
Insulin
Explanation :
Functioning as an exocrine gland, the pancreas excretes enzymes to break down the proteins, lipids, carbohydrates, and nucleic acids in food. Functioning as an endocrine gland, the pancreas secretes the hormones insulin and glucagon to control blood sugar levels throughout the day.
[24] The endangered species are listed in what colour data book?
A.
Black
B.
Red
C.
Green -
D.
Blue
Ans:
Red
Explanation :
A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants (e, reptiles, insects, mosses).
[25] What is true about viruses without exception?
A.
They contain a core of RNA
B.
They can infect bacteria
C.
They cannot produce antibodies
D.
They can multiply only in host cells
Ans:
They can multiply only in host cells
Explanation :
Viruses do not contain enzymes for energy production or protein synthesis. For a virus to multiply, it must invade a host cell and direct the host's metabolic machinery to produce viral enzymes, viral proteins, and copies of its nucleic acid, using the host cell's ATP to power the reactions.
Explanation :
Pollination is the process by which pollen is transferred from the anther (male part) to the stigma (female part) of the plant, thereby enabling fertilization and reproduction. This takes place in the angiosperms, the flower bearing plants.
[22] Widal test is used for the diagnosis of -
A.
Salmonellosis
B.
Malaria
C.
Cholera
D.
Typhoid
Ans:
Typhoid
Explanation :
The Widal test is used to help make a presumptive diagnosis of enteric fever, also known as typhoid fever. Typhidot is the other test used to ascertain the diagnosis of typhoid fever.
[23] The pancreas secretes -
A.
Insulin
B.
Bile juice
C.
Peptic juice
D.
None of these
Ans:
Insulin
Explanation :
Functioning as an exocrine gland, the pancreas excretes enzymes to break down the proteins, lipids, carbohydrates, and nucleic acids in food. Functioning as an endocrine gland, the pancreas secretes the hormones insulin and glucagon to control blood sugar levels throughout the day.
[24] The endangered species are listed in what colour data book?
A.
Black
B.
Red
C.
Green -
D.
Blue
Ans:
Red
Explanation :
A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants (e, reptiles, insects, mosses).
[25] What is true about viruses without exception?
A.
They contain a core of RNA
B.
They can infect bacteria
C.
They cannot produce antibodies
D.
They can multiply only in host cells
Ans:
They can multiply only in host cells
Explanation :
Viruses do not contain enzymes for energy production or protein synthesis. For a virus to multiply, it must invade a host cell and direct the host's metabolic machinery to produce viral enzymes, viral proteins, and copies of its nucleic acid, using the host cell's ATP to power the reactions.
Explanation :
Functioning as an exocrine gland, the pancreas excretes enzymes to break down the proteins, lipids, carbohydrates, and nucleic acids in food. Functioning as an endocrine gland, the pancreas secretes the hormones insulin and glucagon to control blood sugar levels throughout the day.
[24] The endangered species are listed in what colour data book?
A.
Black
B.
Red
C.
Green -
D.
Blue
Ans:
Red
Explanation :
A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants (e, reptiles, insects, mosses).
[25] What is true about viruses without exception?
A.
They contain a core of RNA
B.
They can infect bacteria
C.
They cannot produce antibodies
D.
They can multiply only in host cells
Ans:
They can multiply only in host cells
Explanation :
Viruses do not contain enzymes for energy production or protein synthesis. For a virus to multiply, it must invade a host cell and direct the host's metabolic machinery to produce viral enzymes, viral proteins, and copies of its nucleic acid, using the host cell's ATP to power the reactions.
Explanation :
Viruses do not contain enzymes for energy production or protein synthesis. For a virus to multiply, it must invade a host cell and direct the host's metabolic machinery to produce viral enzymes, viral proteins, and copies of its nucleic acid, using the host cell's ATP to power the reactions.