[1] is called as 'Father of Genetics'.
A.
Charles Darwin
B.
Hugo de Vries
C.
Gregor Johann Mendel
D.
Jean Baptiste Lamarck
Ans:
Gregor Johann Mendel
Explanation :
Gregor Mendel: the 'father of genetics' In the 19th century, it was commonly believed that an organism's traits were passed on to offspring in a blend of characteristics 'donated' by each parent.
[2] Quinine is obtained from which of the following Plant?
A.
Cinchona
B.
Cocoa
C.
Mulberry
D.
Eucalyptus
Ans:
Cinchona
Explanation :
Quinine is a medication used to treat malaria due to Plasmodium falciparum. Chinchona bark is best known as the source of the anti-malarial drug quinine. Cinchona is the national tree of both Peru and Ecuador.
[3] Which enzyme digests proteins in the stomach?
A.
Trypsin
B.
Pepsin
C.
Salivary amylase
D.
Pancreatic canal
Ans:
Pepsin
Explanation :
Protein digestion begins in the stomach with the action of pepsin. Pepsin is the active protein-digesting enzyme of the stomach. When pepsin acts on the protein molecule, it breaks the bonds that hold the protein molecule together, called peptide bonds. Once broken, peptide bonds yield chains of amino acids linked together called polypeptides that are digested in the small intestine with the help of trypsin, chymotrypsin, and carboxypeptidase.
[4] Fermentation is a type of process.
A.
Aerobic Respiration
B.
Anaerobic Respiration
C.
Exothermic Reaction
D.
Transpiration
Ans:
Anaerobic Respiration
Explanation :
Fermentation in food processing is the process of converting carbohydrates to alcohol or organic acids using microorganisms—yeasts or bacteria—under anaerobic conditions. It also occurs in oxygen-starved muscle cells, as in the case of lactic acid fermentation.
[5] Name the scientist who proved that plants have life.
A.
Mendal
B.
Hugo de vries
C.
Jagdish Chandra Bose
D.
Robert Brown
Ans:
Jagdish Chandra Bose
Explanation :
Indian scientist Jagadish Chandra Bose, began to conduct experiments on plants in the year 1900. Bose invented various devices and instruments to measure electrical responses in plants. He stated from his experiments that an electrical spasm occurs during the end of life for a plant.
[6] The sexual reproductive organs of aspergillus are -
A.
Spermatium and Oogonium
B.
Antheridium and Oogonium
C.
Spermatium and Ascogonium
D.
Antheridium and Ascogonium
Ans:
Antheridium and Ascogonium
Explanation :
Sexual reproduction in Aspergillus is rare and takes place in favourable conditfons. Sex organs are produced on the same mycelium which has produced conidia. Male organs are called Antheridium or Pollinoduim and female are called archicarp or Ascogoniurn. Female organs develop as a branch of hypha. The antheridium curves round and bend towards the apex of archicarp as a result of which they become spirally coiled and their tips get fused.
[7] Which one of the following weeds is effective in controlling water pollution caused by industrial effluents?
A.
Parthenium
B.
Elephant grass
C.
Water hycinth
D.
Molar grass
Ans:
Water hycinth
Explanation :
Water hyacinth (Eichhornia crassipes) is used for purifying not only domestic wastewater but also industrial wastewater. It can readily absorb, accumulate and concentrate heavy metals such as lead, cadmium, mercury and nickel. Other studies have evaluated the potential of water hyacinth to absorb various organic chemicals like phenols and toxaphene. Water hyacinth can remove even radioactive metals from industrial effluents, which is very difficult otherwise.
[8] Name the gas used in preparation of bleaching powder -
A.
Oxygen
B.
Hydrogen
C.
Nitrogen
D.
Chlorine
Ans:
Chlorine
Explanation :
Bleaching powder (CaOCl2) in manufactured by passing chlorine gas over dry slaked lime. Bleaching powder is also called calcium chlorohypochlorite because it is considered as a mixed salt of hydrochloric acid and hypochlorous acid.
[9] Rio Summit is associated with -
A.
Convention on Biological Diversity
B.
Green house gases
C.
Ozone depletion
D.
Wet lands
Ans:
Convention on Biological Diversity
Explanation :
The United Nations Conference on Environment and Development (UNCED), otherwise known as the Earth Summit or Rio Summit, was held in Rio de Janeiro, Brazil, in June 1992. An important achievement of the summit was an agreement on the Climate Change Convention. Besides, the Convention on Biological Diversity was opened for signature at the Rio Summit on 5 June 1992 and entered into force on 29 December 1993.
[10] Which of the following is an airborne disease?
A.
Measles
B.
Typhoid
C.
Pink eye
D.
None of the above
Ans:
Measles
Explanation :
Airborne diseases are the infections spread by airborne transmissions including Chickenpox, Anthrax, Influenza, Measles, Smallpox, Cryptococcosis and Tuberculosis.
[11] Which one of the following is also called the ‘power plants’ of the cell?
A.
Golgi body
B.
Mitochondrion
C.
Ribosome
D.
Lysosome
Ans:
Mitochondrion
Explanation :
In cell biology, a mitochondrion (plural mitochondria) is a membrane-enclosed organelle found in most eukaryotic cells. These organelles range from 0.5 to 1.0 micrometer (ìm) in diameter. Mitochondria are sometimes described as “cellular power plants” because they generate most of the cell’s supply of adenosine triphosphate (ATP), used as a source of chemical energy. In addition to supplying cellular energy, mitochondria are involved in other tasks such as signaling, cellular differentiation, cell death, as well as the control of the cell cycle and cell growth.
[12] A universal donor has the blood group -
A.
B
B.
AB
C.
A
D.
O
Ans:
O
Explanation :
Individuals with type O blood are often called universal donors. They can receive blood only from a group O individual, but can donate blood to individuals of any ABO blood group (i.e., A, B, O or AB).
[13] The enzyme which catalyzes the unwinding of DNA helix during replication is:
A.
Primase
B.
Topoisomerase
C.
Helicase
D.
DNApolymerase
Ans:
Helicase
Explanation :
A type of helicase enzyme called DNA helicase catalyzes the unwinding of the DNA helix at the time of replication. It uses the energy released through hydrolysis of ATP (Adenosine triphosphate) to break the hydrogen bonds between the two strands. The enzyme is needed to separate the two strands of DNA also during transcription and DNA repair.
[14] Blue Revolution is related to:
A.
Space research
B.
Poultry
C.
Drinking water
D.
Fisheries
Ans:
Poultry
Explanation :
Blue Revolution means the adoption of a package programme to increase the production of fish and marine products. The Blue Revolution in India was started in 1970 during the Fifth Five-Year Plan when the Central Government sponsored the Fish. Farmers Development Agency (FFDA). It is related to fish. breeding, fish rearing, fish marketing, and fish ex-port.
[15] Scurvey is caused by:
A.
Vitamin 'D'
B.
Vitamin 'A'
C.
Vitamin 'C'
D.
Vitamin 'B'
Ans:
Vitamin 'C'
Explanation :
Scurvy is a disease resulting from a deficiency of vitamin C (ascorbic acid). It is sometimes also referred to as Barlow's disease, named after Sir Thomas Barlow, a British physician who described it in 1883. Scurvy can be prevented by consuming enough vitamin C, either in the diet or as a supplement.
[16] Linseed is obtained from -
A.
Castor
B.
Flax
C.
Groundnut
D.
Sesame
Ans:
Flax
Explanation :
Linseed are the seeds of the flax plant, which are the source of linseed oil and linseed cake. Flax is a member of the genus Linum in the family Linaceae. Linseed is one of the most potent sources of omega 3 fatty acids found in nature.
[17] Which of the following organism possesses characteristics of a plant and an animal?
A.
Euglena
B.
Mycoplasma.
C.
Paramecium
D.
Chlorella
Ans:
Euglena
Explanation :
Most species of Euglena have photosynthesizing chloroplasts within the body of the cell, which enable them to feed by autotrophy (making energy-containing organic molecules from inorganic raw material through the use of an energy source such as sun-light), like plants. However, they can also take nourishment heterotrophically (making use of food that comes from other organisms in the form of fats, carbohydrates, and proteins), like animals. So Euglena have features of both animals and plants.
[18] Which one of the following features is absent in a virus?
A.
reproduce within host cell
B.
presence of cell wall
C.
fully parasitic in nature
D.
presence of either DNA or
Ans:
presence of cell wall
Explanation :
A virus has a simple structure. It has no internal cellular structure, no cell wall or cell membrane, just the protein coat that holds the string of nucleic acid. It is made only of a nucleic acid + a protein coat. A cell wall is a layer located outside the cell membrane found in plants, fungi, bacteria, algae, and archaea.
[19] The colour of the carrots is due to the presence of -
A.
Carotene
B.
Chlorophyll
C.
Phycocyanin
D.
Phycoerythirn
Ans:
Carotene
Explanation :
Carotenes are photosynthetic pigments that are responsible for the orange colour of the carrot, for which this class of chemicals is named. Some carrots are yellow due to Anthocyanins. Carotenes are also responsible for the orange (but not all of the yellow) colours in dry foliage.
[20] Name the vitamin whose deficiency causes excessive bleeding?
A.
Vitamin A
B.
Vitamin B
C.
Vitamin K
D.
Vitamin C
Ans:
Vitamin K
Explanation :
Vitamin K is a group of structurally similar, fat-soluble vitamins that the human body requires for complete synthesis of certain proteins that are prerequisites for blood coagulation.
[21] Study of old age is called -
A.
Gerantalogy
B.
Pedology
C.
Ornithology
D.
Anthropology
Ans:
Gerantalogy
Explanation :
Gerontology is the study of aging and older adults. The science of gerontology has evolved as longevity has improved. Researchers in this field are diverse and are trained in areas such as physiology, social science, psychology, public health, and policy.
[22] Which of the following is also used as a Bio fertilizer?
A.
Rhizobium
B.
Azotobactar
C.
Azospirillum
D.
All of the above
Ans:
All of the above
Explanation :
A Bio fertilizer is a substance which contains living microorganisms which, when applied to seeds, pl ant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. Rhizobium, Azotobacter, Azospirillum and blue green algae are traditionally used as Biofertilizers.
[23] Wings of birds and insects are -
A.
Xenologous
B.
Homologous
C.
Paralogous
D.
Analogous
Ans:
Analogous
Explanation :
Wings of birds and insects are analogous structures used for flight in both types of organisms. But, they have no common ancestral origin at the beginning of their evolutionary development. They show similar function but show no similar structural relationship.
[24] With which one of the following Jacobsons organ is related to?
A.
Vision
B.
Chewing
C.
Smelling
D.
Hearing
Ans:
Smelling
Explanation :
Jacobson's organ, also called vomeronasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a "sense of smell" receptor that is actually not receptive to ordinary odors.
[25] Oxyntic cell is meant for the secretion of -
A.
Pepsin
B.
Enterokinase
C.
Hydrochloric acid
D.
Lactic acid
Ans:
Hydrochloric acid
Explanation :
Parietal cells (also known as oxyntic cells), are the epithelial cells that secrete hydrochloric acid (HCL) and intrinsic factor. These cells are located in the gastric glands found in the stomach. They contain an extensive secretory network from which the HCL is secreted by active transport into the stomach.
Explanation :
Gregor Mendel: the 'father of genetics' In the 19th century, it was commonly believed that an organism's traits were passed on to offspring in a blend of characteristics 'donated' by each parent.
[2] Quinine is obtained from which of the following Plant?
A.
Cinchona
B.
Cocoa
C.
Mulberry
D.
Eucalyptus
Ans:
Cinchona
Explanation :
Quinine is a medication used to treat malaria due to Plasmodium falciparum. Chinchona bark is best known as the source of the anti-malarial drug quinine. Cinchona is the national tree of both Peru and Ecuador.
[3] Which enzyme digests proteins in the stomach?
A.
Trypsin
B.
Pepsin
C.
Salivary amylase
D.
Pancreatic canal
Ans:
Pepsin
Explanation :
Protein digestion begins in the stomach with the action of pepsin. Pepsin is the active protein-digesting enzyme of the stomach. When pepsin acts on the protein molecule, it breaks the bonds that hold the protein molecule together, called peptide bonds. Once broken, peptide bonds yield chains of amino acids linked together called polypeptides that are digested in the small intestine with the help of trypsin, chymotrypsin, and carboxypeptidase.
[4] Fermentation is a type of process.
A.
Aerobic Respiration
B.
Anaerobic Respiration
C.
Exothermic Reaction
D.
Transpiration
Ans:
Anaerobic Respiration
Explanation :
Fermentation in food processing is the process of converting carbohydrates to alcohol or organic acids using microorganisms—yeasts or bacteria—under anaerobic conditions. It also occurs in oxygen-starved muscle cells, as in the case of lactic acid fermentation.
[5] Name the scientist who proved that plants have life.
A.
Mendal
B.
Hugo de vries
C.
Jagdish Chandra Bose
D.
Robert Brown
Ans:
Jagdish Chandra Bose
Explanation :
Indian scientist Jagadish Chandra Bose, began to conduct experiments on plants in the year 1900. Bose invented various devices and instruments to measure electrical responses in plants. He stated from his experiments that an electrical spasm occurs during the end of life for a plant.
[6] The sexual reproductive organs of aspergillus are -
A.
Spermatium and Oogonium
B.
Antheridium and Oogonium
C.
Spermatium and Ascogonium
D.
Antheridium and Ascogonium
Ans:
Antheridium and Ascogonium
Explanation :
Sexual reproduction in Aspergillus is rare and takes place in favourable conditfons. Sex organs are produced on the same mycelium which has produced conidia. Male organs are called Antheridium or Pollinoduim and female are called archicarp or Ascogoniurn. Female organs develop as a branch of hypha. The antheridium curves round and bend towards the apex of archicarp as a result of which they become spirally coiled and their tips get fused.
[7] Which one of the following weeds is effective in controlling water pollution caused by industrial effluents?
A.
Parthenium
B.
Elephant grass
C.
Water hycinth
D.
Molar grass
Ans:
Water hycinth
Explanation :
Water hyacinth (Eichhornia crassipes) is used for purifying not only domestic wastewater but also industrial wastewater. It can readily absorb, accumulate and concentrate heavy metals such as lead, cadmium, mercury and nickel. Other studies have evaluated the potential of water hyacinth to absorb various organic chemicals like phenols and toxaphene. Water hyacinth can remove even radioactive metals from industrial effluents, which is very difficult otherwise.
[8] Name the gas used in preparation of bleaching powder -
A.
Oxygen
B.
Hydrogen
C.
Nitrogen
D.
Chlorine
Ans:
Chlorine
Explanation :
Bleaching powder (CaOCl2) in manufactured by passing chlorine gas over dry slaked lime. Bleaching powder is also called calcium chlorohypochlorite because it is considered as a mixed salt of hydrochloric acid and hypochlorous acid.
[9] Rio Summit is associated with -
A.
Convention on Biological Diversity
B.
Green house gases
C.
Ozone depletion
D.
Wet lands
Ans:
Convention on Biological Diversity
Explanation :
The United Nations Conference on Environment and Development (UNCED), otherwise known as the Earth Summit or Rio Summit, was held in Rio de Janeiro, Brazil, in June 1992. An important achievement of the summit was an agreement on the Climate Change Convention. Besides, the Convention on Biological Diversity was opened for signature at the Rio Summit on 5 June 1992 and entered into force on 29 December 1993.
[10] Which of the following is an airborne disease?
A.
Measles
B.
Typhoid
C.
Pink eye
D.
None of the above
Ans:
Measles
Explanation :
Airborne diseases are the infections spread by airborne transmissions including Chickenpox, Anthrax, Influenza, Measles, Smallpox, Cryptococcosis and Tuberculosis.
[11] Which one of the following is also called the ‘power plants’ of the cell?
A.
Golgi body
B.
Mitochondrion
C.
Ribosome
D.
Lysosome
Ans:
Mitochondrion
Explanation :
In cell biology, a mitochondrion (plural mitochondria) is a membrane-enclosed organelle found in most eukaryotic cells. These organelles range from 0.5 to 1.0 micrometer (ìm) in diameter. Mitochondria are sometimes described as “cellular power plants” because they generate most of the cell’s supply of adenosine triphosphate (ATP), used as a source of chemical energy. In addition to supplying cellular energy, mitochondria are involved in other tasks such as signaling, cellular differentiation, cell death, as well as the control of the cell cycle and cell growth.
[12] A universal donor has the blood group -
A.
B
B.
AB
C.
A
D.
O
Ans:
O
Explanation :
Individuals with type O blood are often called universal donors. They can receive blood only from a group O individual, but can donate blood to individuals of any ABO blood group (i.e., A, B, O or AB).
[13] The enzyme which catalyzes the unwinding of DNA helix during replication is:
A.
Primase
B.
Topoisomerase
C.
Helicase
D.
DNApolymerase
Ans:
Helicase
Explanation :
A type of helicase enzyme called DNA helicase catalyzes the unwinding of the DNA helix at the time of replication. It uses the energy released through hydrolysis of ATP (Adenosine triphosphate) to break the hydrogen bonds between the two strands. The enzyme is needed to separate the two strands of DNA also during transcription and DNA repair.
[14] Blue Revolution is related to:
A.
Space research
B.
Poultry
C.
Drinking water
D.
Fisheries
Ans:
Poultry
Explanation :
Blue Revolution means the adoption of a package programme to increase the production of fish and marine products. The Blue Revolution in India was started in 1970 during the Fifth Five-Year Plan when the Central Government sponsored the Fish. Farmers Development Agency (FFDA). It is related to fish. breeding, fish rearing, fish marketing, and fish ex-port.
[15] Scurvey is caused by:
A.
Vitamin 'D'
B.
Vitamin 'A'
C.
Vitamin 'C'
D.
Vitamin 'B'
Ans:
Vitamin 'C'
Explanation :
Scurvy is a disease resulting from a deficiency of vitamin C (ascorbic acid). It is sometimes also referred to as Barlow's disease, named after Sir Thomas Barlow, a British physician who described it in 1883. Scurvy can be prevented by consuming enough vitamin C, either in the diet or as a supplement.
[16] Linseed is obtained from -
A.
Castor
B.
Flax
C.
Groundnut
D.
Sesame
Ans:
Flax
Explanation :
Linseed are the seeds of the flax plant, which are the source of linseed oil and linseed cake. Flax is a member of the genus Linum in the family Linaceae. Linseed is one of the most potent sources of omega 3 fatty acids found in nature.
[17] Which of the following organism possesses characteristics of a plant and an animal?
A.
Euglena
B.
Mycoplasma.
C.
Paramecium
D.
Chlorella
Ans:
Euglena
Explanation :
Most species of Euglena have photosynthesizing chloroplasts within the body of the cell, which enable them to feed by autotrophy (making energy-containing organic molecules from inorganic raw material through the use of an energy source such as sun-light), like plants. However, they can also take nourishment heterotrophically (making use of food that comes from other organisms in the form of fats, carbohydrates, and proteins), like animals. So Euglena have features of both animals and plants.
[18] Which one of the following features is absent in a virus?
A.
reproduce within host cell
B.
presence of cell wall
C.
fully parasitic in nature
D.
presence of either DNA or
Ans:
presence of cell wall
Explanation :
A virus has a simple structure. It has no internal cellular structure, no cell wall or cell membrane, just the protein coat that holds the string of nucleic acid. It is made only of a nucleic acid + a protein coat. A cell wall is a layer located outside the cell membrane found in plants, fungi, bacteria, algae, and archaea.
[19] The colour of the carrots is due to the presence of -
A.
Carotene
B.
Chlorophyll
C.
Phycocyanin
D.
Phycoerythirn
Ans:
Carotene
Explanation :
Carotenes are photosynthetic pigments that are responsible for the orange colour of the carrot, for which this class of chemicals is named. Some carrots are yellow due to Anthocyanins. Carotenes are also responsible for the orange (but not all of the yellow) colours in dry foliage.
[20] Name the vitamin whose deficiency causes excessive bleeding?
A.
Vitamin A
B.
Vitamin B
C.
Vitamin K
D.
Vitamin C
Ans:
Vitamin K
Explanation :
Vitamin K is a group of structurally similar, fat-soluble vitamins that the human body requires for complete synthesis of certain proteins that are prerequisites for blood coagulation.
[21] Study of old age is called -
A.
Gerantalogy
B.
Pedology
C.
Ornithology
D.
Anthropology
Ans:
Gerantalogy
Explanation :
Gerontology is the study of aging and older adults. The science of gerontology has evolved as longevity has improved. Researchers in this field are diverse and are trained in areas such as physiology, social science, psychology, public health, and policy.
[22] Which of the following is also used as a Bio fertilizer?
A.
Rhizobium
B.
Azotobactar
C.
Azospirillum
D.
All of the above
Ans:
All of the above
Explanation :
A Bio fertilizer is a substance which contains living microorganisms which, when applied to seeds, pl ant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. Rhizobium, Azotobacter, Azospirillum and blue green algae are traditionally used as Biofertilizers.
[23] Wings of birds and insects are -
A.
Xenologous
B.
Homologous
C.
Paralogous
D.
Analogous
Ans:
Analogous
Explanation :
Wings of birds and insects are analogous structures used for flight in both types of organisms. But, they have no common ancestral origin at the beginning of their evolutionary development. They show similar function but show no similar structural relationship.
[24] With which one of the following Jacobsons organ is related to?
A.
Vision
B.
Chewing
C.
Smelling
D.
Hearing
Ans:
Smelling
Explanation :
Jacobson's organ, also called vomeronasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a "sense of smell" receptor that is actually not receptive to ordinary odors.
[25] Oxyntic cell is meant for the secretion of -
A.
Pepsin
B.
Enterokinase
C.
Hydrochloric acid
D.
Lactic acid
Ans:
Hydrochloric acid
Explanation :
Parietal cells (also known as oxyntic cells), are the epithelial cells that secrete hydrochloric acid (HCL) and intrinsic factor. These cells are located in the gastric glands found in the stomach. They contain an extensive secretory network from which the HCL is secreted by active transport into the stomach.
Explanation :
Protein digestion begins in the stomach with the action of pepsin. Pepsin is the active protein-digesting enzyme of the stomach. When pepsin acts on the protein molecule, it breaks the bonds that hold the protein molecule together, called peptide bonds. Once broken, peptide bonds yield chains of amino acids linked together called polypeptides that are digested in the small intestine with the help of trypsin, chymotrypsin, and carboxypeptidase.
[4] Fermentation is a type of process.
A.
Aerobic Respiration
B.
Anaerobic Respiration
C.
Exothermic Reaction
D.
Transpiration
Ans:
Anaerobic Respiration
Explanation :
Fermentation in food processing is the process of converting carbohydrates to alcohol or organic acids using microorganisms—yeasts or bacteria—under anaerobic conditions. It also occurs in oxygen-starved muscle cells, as in the case of lactic acid fermentation.
[5] Name the scientist who proved that plants have life.
A.
Mendal
B.
Hugo de vries
C.
Jagdish Chandra Bose
D.
Robert Brown
Ans:
Jagdish Chandra Bose
Explanation :
Indian scientist Jagadish Chandra Bose, began to conduct experiments on plants in the year 1900. Bose invented various devices and instruments to measure electrical responses in plants. He stated from his experiments that an electrical spasm occurs during the end of life for a plant.
[6] The sexual reproductive organs of aspergillus are -
A.
Spermatium and Oogonium
B.
Antheridium and Oogonium
C.
Spermatium and Ascogonium
D.
Antheridium and Ascogonium
Ans:
Antheridium and Ascogonium
Explanation :
Sexual reproduction in Aspergillus is rare and takes place in favourable conditfons. Sex organs are produced on the same mycelium which has produced conidia. Male organs are called Antheridium or Pollinoduim and female are called archicarp or Ascogoniurn. Female organs develop as a branch of hypha. The antheridium curves round and bend towards the apex of archicarp as a result of which they become spirally coiled and their tips get fused.
[7] Which one of the following weeds is effective in controlling water pollution caused by industrial effluents?
A.
Parthenium
B.
Elephant grass
C.
Water hycinth
D.
Molar grass
Ans:
Water hycinth
Explanation :
Water hyacinth (Eichhornia crassipes) is used for purifying not only domestic wastewater but also industrial wastewater. It can readily absorb, accumulate and concentrate heavy metals such as lead, cadmium, mercury and nickel. Other studies have evaluated the potential of water hyacinth to absorb various organic chemicals like phenols and toxaphene. Water hyacinth can remove even radioactive metals from industrial effluents, which is very difficult otherwise.
[8] Name the gas used in preparation of bleaching powder -
A.
Oxygen
B.
Hydrogen
C.
Nitrogen
D.
Chlorine
Ans:
Chlorine
Explanation :
Bleaching powder (CaOCl2) in manufactured by passing chlorine gas over dry slaked lime. Bleaching powder is also called calcium chlorohypochlorite because it is considered as a mixed salt of hydrochloric acid and hypochlorous acid.
[9] Rio Summit is associated with -
A.
Convention on Biological Diversity
B.
Green house gases
C.
Ozone depletion
D.
Wet lands
Ans:
Convention on Biological Diversity
Explanation :
The United Nations Conference on Environment and Development (UNCED), otherwise known as the Earth Summit or Rio Summit, was held in Rio de Janeiro, Brazil, in June 1992. An important achievement of the summit was an agreement on the Climate Change Convention. Besides, the Convention on Biological Diversity was opened for signature at the Rio Summit on 5 June 1992 and entered into force on 29 December 1993.
[10] Which of the following is an airborne disease?
A.
Measles
B.
Typhoid
C.
Pink eye
D.
None of the above
Ans:
Measles
Explanation :
Airborne diseases are the infections spread by airborne transmissions including Chickenpox, Anthrax, Influenza, Measles, Smallpox, Cryptococcosis and Tuberculosis.
[11] Which one of the following is also called the ‘power plants’ of the cell?
A.
Golgi body
B.
Mitochondrion
C.
Ribosome
D.
Lysosome
Ans:
Mitochondrion
Explanation :
In cell biology, a mitochondrion (plural mitochondria) is a membrane-enclosed organelle found in most eukaryotic cells. These organelles range from 0.5 to 1.0 micrometer (ìm) in diameter. Mitochondria are sometimes described as “cellular power plants” because they generate most of the cell’s supply of adenosine triphosphate (ATP), used as a source of chemical energy. In addition to supplying cellular energy, mitochondria are involved in other tasks such as signaling, cellular differentiation, cell death, as well as the control of the cell cycle and cell growth.
[12] A universal donor has the blood group -
A.
B
B.
AB
C.
A
D.
O
Ans:
O
Explanation :
Individuals with type O blood are often called universal donors. They can receive blood only from a group O individual, but can donate blood to individuals of any ABO blood group (i.e., A, B, O or AB).
[13] The enzyme which catalyzes the unwinding of DNA helix during replication is:
A.
Primase
B.
Topoisomerase
C.
Helicase
D.
DNApolymerase
Ans:
Helicase
Explanation :
A type of helicase enzyme called DNA helicase catalyzes the unwinding of the DNA helix at the time of replication. It uses the energy released through hydrolysis of ATP (Adenosine triphosphate) to break the hydrogen bonds between the two strands. The enzyme is needed to separate the two strands of DNA also during transcription and DNA repair.
[14] Blue Revolution is related to:
A.
Space research
B.
Poultry
C.
Drinking water
D.
Fisheries
Ans:
Poultry
Explanation :
Blue Revolution means the adoption of a package programme to increase the production of fish and marine products. The Blue Revolution in India was started in 1970 during the Fifth Five-Year Plan when the Central Government sponsored the Fish. Farmers Development Agency (FFDA). It is related to fish. breeding, fish rearing, fish marketing, and fish ex-port.
[15] Scurvey is caused by:
A.
Vitamin 'D'
B.
Vitamin 'A'
C.
Vitamin 'C'
D.
Vitamin 'B'
Ans:
Vitamin 'C'
Explanation :
Scurvy is a disease resulting from a deficiency of vitamin C (ascorbic acid). It is sometimes also referred to as Barlow's disease, named after Sir Thomas Barlow, a British physician who described it in 1883. Scurvy can be prevented by consuming enough vitamin C, either in the diet or as a supplement.
[16] Linseed is obtained from -
A.
Castor
B.
Flax
C.
Groundnut
D.
Sesame
Ans:
Flax
Explanation :
Linseed are the seeds of the flax plant, which are the source of linseed oil and linseed cake. Flax is a member of the genus Linum in the family Linaceae. Linseed is one of the most potent sources of omega 3 fatty acids found in nature.
[17] Which of the following organism possesses characteristics of a plant and an animal?
A.
Euglena
B.
Mycoplasma.
C.
Paramecium
D.
Chlorella
Ans:
Euglena
Explanation :
Most species of Euglena have photosynthesizing chloroplasts within the body of the cell, which enable them to feed by autotrophy (making energy-containing organic molecules from inorganic raw material through the use of an energy source such as sun-light), like plants. However, they can also take nourishment heterotrophically (making use of food that comes from other organisms in the form of fats, carbohydrates, and proteins), like animals. So Euglena have features of both animals and plants.
[18] Which one of the following features is absent in a virus?
A.
reproduce within host cell
B.
presence of cell wall
C.
fully parasitic in nature
D.
presence of either DNA or
Ans:
presence of cell wall
Explanation :
A virus has a simple structure. It has no internal cellular structure, no cell wall or cell membrane, just the protein coat that holds the string of nucleic acid. It is made only of a nucleic acid + a protein coat. A cell wall is a layer located outside the cell membrane found in plants, fungi, bacteria, algae, and archaea.
[19] The colour of the carrots is due to the presence of -
A.
Carotene
B.
Chlorophyll
C.
Phycocyanin
D.
Phycoerythirn
Ans:
Carotene
Explanation :
Carotenes are photosynthetic pigments that are responsible for the orange colour of the carrot, for which this class of chemicals is named. Some carrots are yellow due to Anthocyanins. Carotenes are also responsible for the orange (but not all of the yellow) colours in dry foliage.
[20] Name the vitamin whose deficiency causes excessive bleeding?
A.
Vitamin A
B.
Vitamin B
C.
Vitamin K
D.
Vitamin C
Ans:
Vitamin K
Explanation :
Vitamin K is a group of structurally similar, fat-soluble vitamins that the human body requires for complete synthesis of certain proteins that are prerequisites for blood coagulation.
[21] Study of old age is called -
A.
Gerantalogy
B.
Pedology
C.
Ornithology
D.
Anthropology
Ans:
Gerantalogy
Explanation :
Gerontology is the study of aging and older adults. The science of gerontology has evolved as longevity has improved. Researchers in this field are diverse and are trained in areas such as physiology, social science, psychology, public health, and policy.
[22] Which of the following is also used as a Bio fertilizer?
A.
Rhizobium
B.
Azotobactar
C.
Azospirillum
D.
All of the above
Ans:
All of the above
Explanation :
A Bio fertilizer is a substance which contains living microorganisms which, when applied to seeds, pl ant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. Rhizobium, Azotobacter, Azospirillum and blue green algae are traditionally used as Biofertilizers.
[23] Wings of birds and insects are -
A.
Xenologous
B.
Homologous
C.
Paralogous
D.
Analogous
Ans:
Analogous
Explanation :
Wings of birds and insects are analogous structures used for flight in both types of organisms. But, they have no common ancestral origin at the beginning of their evolutionary development. They show similar function but show no similar structural relationship.
[24] With which one of the following Jacobsons organ is related to?
A.
Vision
B.
Chewing
C.
Smelling
D.
Hearing
Ans:
Smelling
Explanation :
Jacobson's organ, also called vomeronasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a "sense of smell" receptor that is actually not receptive to ordinary odors.
[25] Oxyntic cell is meant for the secretion of -
A.
Pepsin
B.
Enterokinase
C.
Hydrochloric acid
D.
Lactic acid
Ans:
Hydrochloric acid
Explanation :
Parietal cells (also known as oxyntic cells), are the epithelial cells that secrete hydrochloric acid (HCL) and intrinsic factor. These cells are located in the gastric glands found in the stomach. They contain an extensive secretory network from which the HCL is secreted by active transport into the stomach.
Explanation :
Indian scientist Jagadish Chandra Bose, began to conduct experiments on plants in the year 1900. Bose invented various devices and instruments to measure electrical responses in plants. He stated from his experiments that an electrical spasm occurs during the end of life for a plant.
[6] The sexual reproductive organs of aspergillus are -
A.
Spermatium and Oogonium
B.
Antheridium and Oogonium
C.
Spermatium and Ascogonium
D.
Antheridium and Ascogonium
Ans:
Antheridium and Ascogonium
Explanation :
Sexual reproduction in Aspergillus is rare and takes place in favourable conditfons. Sex organs are produced on the same mycelium which has produced conidia. Male organs are called Antheridium or Pollinoduim and female are called archicarp or Ascogoniurn. Female organs develop as a branch of hypha. The antheridium curves round and bend towards the apex of archicarp as a result of which they become spirally coiled and their tips get fused.
[7] Which one of the following weeds is effective in controlling water pollution caused by industrial effluents?
A.
Parthenium
B.
Elephant grass
C.
Water hycinth
D.
Molar grass
Ans:
Water hycinth
Explanation :
Water hyacinth (Eichhornia crassipes) is used for purifying not only domestic wastewater but also industrial wastewater. It can readily absorb, accumulate and concentrate heavy metals such as lead, cadmium, mercury and nickel. Other studies have evaluated the potential of water hyacinth to absorb various organic chemicals like phenols and toxaphene. Water hyacinth can remove even radioactive metals from industrial effluents, which is very difficult otherwise.
[8] Name the gas used in preparation of bleaching powder -
A.
Oxygen
B.
Hydrogen
C.
Nitrogen
D.
Chlorine
Ans:
Chlorine
Explanation :
Bleaching powder (CaOCl2) in manufactured by passing chlorine gas over dry slaked lime. Bleaching powder is also called calcium chlorohypochlorite because it is considered as a mixed salt of hydrochloric acid and hypochlorous acid.
[9] Rio Summit is associated with -
A.
Convention on Biological Diversity
B.
Green house gases
C.
Ozone depletion
D.
Wet lands
Ans:
Convention on Biological Diversity
Explanation :
The United Nations Conference on Environment and Development (UNCED), otherwise known as the Earth Summit or Rio Summit, was held in Rio de Janeiro, Brazil, in June 1992. An important achievement of the summit was an agreement on the Climate Change Convention. Besides, the Convention on Biological Diversity was opened for signature at the Rio Summit on 5 June 1992 and entered into force on 29 December 1993.
[10] Which of the following is an airborne disease?
A.
Measles
B.
Typhoid
C.
Pink eye
D.
None of the above
Ans:
Measles
Explanation :
Airborne diseases are the infections spread by airborne transmissions including Chickenpox, Anthrax, Influenza, Measles, Smallpox, Cryptococcosis and Tuberculosis.
[11] Which one of the following is also called the ‘power plants’ of the cell?
A.
Golgi body
B.
Mitochondrion
C.
Ribosome
D.
Lysosome
Ans:
Mitochondrion
Explanation :
In cell biology, a mitochondrion (plural mitochondria) is a membrane-enclosed organelle found in most eukaryotic cells. These organelles range from 0.5 to 1.0 micrometer (ìm) in diameter. Mitochondria are sometimes described as “cellular power plants” because they generate most of the cell’s supply of adenosine triphosphate (ATP), used as a source of chemical energy. In addition to supplying cellular energy, mitochondria are involved in other tasks such as signaling, cellular differentiation, cell death, as well as the control of the cell cycle and cell growth.
[12] A universal donor has the blood group -
A.
B
B.
AB
C.
A
D.
O
Ans:
O
Explanation :
Individuals with type O blood are often called universal donors. They can receive blood only from a group O individual, but can donate blood to individuals of any ABO blood group (i.e., A, B, O or AB).
[13] The enzyme which catalyzes the unwinding of DNA helix during replication is:
A.
Primase
B.
Topoisomerase
C.
Helicase
D.
DNApolymerase
Ans:
Helicase
Explanation :
A type of helicase enzyme called DNA helicase catalyzes the unwinding of the DNA helix at the time of replication. It uses the energy released through hydrolysis of ATP (Adenosine triphosphate) to break the hydrogen bonds between the two strands. The enzyme is needed to separate the two strands of DNA also during transcription and DNA repair.
[14] Blue Revolution is related to:
A.
Space research
B.
Poultry
C.
Drinking water
D.
Fisheries
Ans:
Poultry
Explanation :
Blue Revolution means the adoption of a package programme to increase the production of fish and marine products. The Blue Revolution in India was started in 1970 during the Fifth Five-Year Plan when the Central Government sponsored the Fish. Farmers Development Agency (FFDA). It is related to fish. breeding, fish rearing, fish marketing, and fish ex-port.
[15] Scurvey is caused by:
A.
Vitamin 'D'
B.
Vitamin 'A'
C.
Vitamin 'C'
D.
Vitamin 'B'
Ans:
Vitamin 'C'
Explanation :
Scurvy is a disease resulting from a deficiency of vitamin C (ascorbic acid). It is sometimes also referred to as Barlow's disease, named after Sir Thomas Barlow, a British physician who described it in 1883. Scurvy can be prevented by consuming enough vitamin C, either in the diet or as a supplement.
[16] Linseed is obtained from -
A.
Castor
B.
Flax
C.
Groundnut
D.
Sesame
Ans:
Flax
Explanation :
Linseed are the seeds of the flax plant, which are the source of linseed oil and linseed cake. Flax is a member of the genus Linum in the family Linaceae. Linseed is one of the most potent sources of omega 3 fatty acids found in nature.
[17] Which of the following organism possesses characteristics of a plant and an animal?
A.
Euglena
B.
Mycoplasma.
C.
Paramecium
D.
Chlorella
Ans:
Euglena
Explanation :
Most species of Euglena have photosynthesizing chloroplasts within the body of the cell, which enable them to feed by autotrophy (making energy-containing organic molecules from inorganic raw material through the use of an energy source such as sun-light), like plants. However, they can also take nourishment heterotrophically (making use of food that comes from other organisms in the form of fats, carbohydrates, and proteins), like animals. So Euglena have features of both animals and plants.
[18] Which one of the following features is absent in a virus?
A.
reproduce within host cell
B.
presence of cell wall
C.
fully parasitic in nature
D.
presence of either DNA or
Ans:
presence of cell wall
Explanation :
A virus has a simple structure. It has no internal cellular structure, no cell wall or cell membrane, just the protein coat that holds the string of nucleic acid. It is made only of a nucleic acid + a protein coat. A cell wall is a layer located outside the cell membrane found in plants, fungi, bacteria, algae, and archaea.
[19] The colour of the carrots is due to the presence of -
A.
Carotene
B.
Chlorophyll
C.
Phycocyanin
D.
Phycoerythirn
Ans:
Carotene
Explanation :
Carotenes are photosynthetic pigments that are responsible for the orange colour of the carrot, for which this class of chemicals is named. Some carrots are yellow due to Anthocyanins. Carotenes are also responsible for the orange (but not all of the yellow) colours in dry foliage.
[20] Name the vitamin whose deficiency causes excessive bleeding?
A.
Vitamin A
B.
Vitamin B
C.
Vitamin K
D.
Vitamin C
Ans:
Vitamin K
Explanation :
Vitamin K is a group of structurally similar, fat-soluble vitamins that the human body requires for complete synthesis of certain proteins that are prerequisites for blood coagulation.
[21] Study of old age is called -
A.
Gerantalogy
B.
Pedology
C.
Ornithology
D.
Anthropology
Ans:
Gerantalogy
Explanation :
Gerontology is the study of aging and older adults. The science of gerontology has evolved as longevity has improved. Researchers in this field are diverse and are trained in areas such as physiology, social science, psychology, public health, and policy.
[22] Which of the following is also used as a Bio fertilizer?
A.
Rhizobium
B.
Azotobactar
C.
Azospirillum
D.
All of the above
Ans:
All of the above
Explanation :
A Bio fertilizer is a substance which contains living microorganisms which, when applied to seeds, pl ant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. Rhizobium, Azotobacter, Azospirillum and blue green algae are traditionally used as Biofertilizers.
[23] Wings of birds and insects are -
A.
Xenologous
B.
Homologous
C.
Paralogous
D.
Analogous
Ans:
Analogous
Explanation :
Wings of birds and insects are analogous structures used for flight in both types of organisms. But, they have no common ancestral origin at the beginning of their evolutionary development. They show similar function but show no similar structural relationship.
[24] With which one of the following Jacobsons organ is related to?
A.
Vision
B.
Chewing
C.
Smelling
D.
Hearing
Ans:
Smelling
Explanation :
Jacobson's organ, also called vomeronasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a "sense of smell" receptor that is actually not receptive to ordinary odors.
[25] Oxyntic cell is meant for the secretion of -
A.
Pepsin
B.
Enterokinase
C.
Hydrochloric acid
D.
Lactic acid
Ans:
Hydrochloric acid
Explanation :
Parietal cells (also known as oxyntic cells), are the epithelial cells that secrete hydrochloric acid (HCL) and intrinsic factor. These cells are located in the gastric glands found in the stomach. They contain an extensive secretory network from which the HCL is secreted by active transport into the stomach.
Explanation :
Water hyacinth (Eichhornia crassipes) is used for purifying not only domestic wastewater but also industrial wastewater. It can readily absorb, accumulate and concentrate heavy metals such as lead, cadmium, mercury and nickel. Other studies have evaluated the potential of water hyacinth to absorb various organic chemicals like phenols and toxaphene. Water hyacinth can remove even radioactive metals from industrial effluents, which is very difficult otherwise.
[8] Name the gas used in preparation of bleaching powder -
A.
Oxygen
B.
Hydrogen
C.
Nitrogen
D.
Chlorine
Ans:
Chlorine
Explanation :
Bleaching powder (CaOCl2) in manufactured by passing chlorine gas over dry slaked lime. Bleaching powder is also called calcium chlorohypochlorite because it is considered as a mixed salt of hydrochloric acid and hypochlorous acid.
[9] Rio Summit is associated with -
A.
Convention on Biological Diversity
B.
Green house gases
C.
Ozone depletion
D.
Wet lands
Ans:
Convention on Biological Diversity
Explanation :
The United Nations Conference on Environment and Development (UNCED), otherwise known as the Earth Summit or Rio Summit, was held in Rio de Janeiro, Brazil, in June 1992. An important achievement of the summit was an agreement on the Climate Change Convention. Besides, the Convention on Biological Diversity was opened for signature at the Rio Summit on 5 June 1992 and entered into force on 29 December 1993.
[10] Which of the following is an airborne disease?
A.
Measles
B.
Typhoid
C.
Pink eye
D.
None of the above
Ans:
Measles
Explanation :
Airborne diseases are the infections spread by airborne transmissions including Chickenpox, Anthrax, Influenza, Measles, Smallpox, Cryptococcosis and Tuberculosis.
[11] Which one of the following is also called the ‘power plants’ of the cell?
A.
Golgi body
B.
Mitochondrion
C.
Ribosome
D.
Lysosome
Ans:
Mitochondrion
Explanation :
In cell biology, a mitochondrion (plural mitochondria) is a membrane-enclosed organelle found in most eukaryotic cells. These organelles range from 0.5 to 1.0 micrometer (ìm) in diameter. Mitochondria are sometimes described as “cellular power plants” because they generate most of the cell’s supply of adenosine triphosphate (ATP), used as a source of chemical energy. In addition to supplying cellular energy, mitochondria are involved in other tasks such as signaling, cellular differentiation, cell death, as well as the control of the cell cycle and cell growth.
[12] A universal donor has the blood group -
A.
B
B.
AB
C.
A
D.
O
Ans:
O
Explanation :
Individuals with type O blood are often called universal donors. They can receive blood only from a group O individual, but can donate blood to individuals of any ABO blood group (i.e., A, B, O or AB).
[13] The enzyme which catalyzes the unwinding of DNA helix during replication is:
A.
Primase
B.
Topoisomerase
C.
Helicase
D.
DNApolymerase
Ans:
Helicase
Explanation :
A type of helicase enzyme called DNA helicase catalyzes the unwinding of the DNA helix at the time of replication. It uses the energy released through hydrolysis of ATP (Adenosine triphosphate) to break the hydrogen bonds between the two strands. The enzyme is needed to separate the two strands of DNA also during transcription and DNA repair.
[14] Blue Revolution is related to:
A.
Space research
B.
Poultry
C.
Drinking water
D.
Fisheries
Ans:
Poultry
Explanation :
Blue Revolution means the adoption of a package programme to increase the production of fish and marine products. The Blue Revolution in India was started in 1970 during the Fifth Five-Year Plan when the Central Government sponsored the Fish. Farmers Development Agency (FFDA). It is related to fish. breeding, fish rearing, fish marketing, and fish ex-port.
[15] Scurvey is caused by:
A.
Vitamin 'D'
B.
Vitamin 'A'
C.
Vitamin 'C'
D.
Vitamin 'B'
Ans:
Vitamin 'C'
Explanation :
Scurvy is a disease resulting from a deficiency of vitamin C (ascorbic acid). It is sometimes also referred to as Barlow's disease, named after Sir Thomas Barlow, a British physician who described it in 1883. Scurvy can be prevented by consuming enough vitamin C, either in the diet or as a supplement.
[16] Linseed is obtained from -
A.
Castor
B.
Flax
C.
Groundnut
D.
Sesame
Ans:
Flax
Explanation :
Linseed are the seeds of the flax plant, which are the source of linseed oil and linseed cake. Flax is a member of the genus Linum in the family Linaceae. Linseed is one of the most potent sources of omega 3 fatty acids found in nature.
[17] Which of the following organism possesses characteristics of a plant and an animal?
A.
Euglena
B.
Mycoplasma.
C.
Paramecium
D.
Chlorella
Ans:
Euglena
Explanation :
Most species of Euglena have photosynthesizing chloroplasts within the body of the cell, which enable them to feed by autotrophy (making energy-containing organic molecules from inorganic raw material through the use of an energy source such as sun-light), like plants. However, they can also take nourishment heterotrophically (making use of food that comes from other organisms in the form of fats, carbohydrates, and proteins), like animals. So Euglena have features of both animals and plants.
[18] Which one of the following features is absent in a virus?
A.
reproduce within host cell
B.
presence of cell wall
C.
fully parasitic in nature
D.
presence of either DNA or
Ans:
presence of cell wall
Explanation :
A virus has a simple structure. It has no internal cellular structure, no cell wall or cell membrane, just the protein coat that holds the string of nucleic acid. It is made only of a nucleic acid + a protein coat. A cell wall is a layer located outside the cell membrane found in plants, fungi, bacteria, algae, and archaea.
[19] The colour of the carrots is due to the presence of -
A.
Carotene
B.
Chlorophyll
C.
Phycocyanin
D.
Phycoerythirn
Ans:
Carotene
Explanation :
Carotenes are photosynthetic pigments that are responsible for the orange colour of the carrot, for which this class of chemicals is named. Some carrots are yellow due to Anthocyanins. Carotenes are also responsible for the orange (but not all of the yellow) colours in dry foliage.
[20] Name the vitamin whose deficiency causes excessive bleeding?
A.
Vitamin A
B.
Vitamin B
C.
Vitamin K
D.
Vitamin C
Ans:
Vitamin K
Explanation :
Vitamin K is a group of structurally similar, fat-soluble vitamins that the human body requires for complete synthesis of certain proteins that are prerequisites for blood coagulation.
[21] Study of old age is called -
A.
Gerantalogy
B.
Pedology
C.
Ornithology
D.
Anthropology
Ans:
Gerantalogy
Explanation :
Gerontology is the study of aging and older adults. The science of gerontology has evolved as longevity has improved. Researchers in this field are diverse and are trained in areas such as physiology, social science, psychology, public health, and policy.
[22] Which of the following is also used as a Bio fertilizer?
A.
Rhizobium
B.
Azotobactar
C.
Azospirillum
D.
All of the above
Ans:
All of the above
Explanation :
A Bio fertilizer is a substance which contains living microorganisms which, when applied to seeds, pl ant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. Rhizobium, Azotobacter, Azospirillum and blue green algae are traditionally used as Biofertilizers.
[23] Wings of birds and insects are -
A.
Xenologous
B.
Homologous
C.
Paralogous
D.
Analogous
Ans:
Analogous
Explanation :
Wings of birds and insects are analogous structures used for flight in both types of organisms. But, they have no common ancestral origin at the beginning of their evolutionary development. They show similar function but show no similar structural relationship.
[24] With which one of the following Jacobsons organ is related to?
A.
Vision
B.
Chewing
C.
Smelling
D.
Hearing
Ans:
Smelling
Explanation :
Jacobson's organ, also called vomeronasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a "sense of smell" receptor that is actually not receptive to ordinary odors.
[25] Oxyntic cell is meant for the secretion of -
A.
Pepsin
B.
Enterokinase
C.
Hydrochloric acid
D.
Lactic acid
Ans:
Hydrochloric acid
Explanation :
Parietal cells (also known as oxyntic cells), are the epithelial cells that secrete hydrochloric acid (HCL) and intrinsic factor. These cells are located in the gastric glands found in the stomach. They contain an extensive secretory network from which the HCL is secreted by active transport into the stomach.
Explanation :
The United Nations Conference on Environment and Development (UNCED), otherwise known as the Earth Summit or Rio Summit, was held in Rio de Janeiro, Brazil, in June 1992. An important achievement of the summit was an agreement on the Climate Change Convention. Besides, the Convention on Biological Diversity was opened for signature at the Rio Summit on 5 June 1992 and entered into force on 29 December 1993.
[10] Which of the following is an airborne disease?
A.
Measles
B.
Typhoid
C.
Pink eye
D.
None of the above
Ans:
Measles
Explanation :
Airborne diseases are the infections spread by airborne transmissions including Chickenpox, Anthrax, Influenza, Measles, Smallpox, Cryptococcosis and Tuberculosis.
[11] Which one of the following is also called the ‘power plants’ of the cell?
A.
Golgi body
B.
Mitochondrion
C.
Ribosome
D.
Lysosome
Ans:
Mitochondrion
Explanation :
In cell biology, a mitochondrion (plural mitochondria) is a membrane-enclosed organelle found in most eukaryotic cells. These organelles range from 0.5 to 1.0 micrometer (ìm) in diameter. Mitochondria are sometimes described as “cellular power plants” because they generate most of the cell’s supply of adenosine triphosphate (ATP), used as a source of chemical energy. In addition to supplying cellular energy, mitochondria are involved in other tasks such as signaling, cellular differentiation, cell death, as well as the control of the cell cycle and cell growth.
[12] A universal donor has the blood group -
A.
B
B.
AB
C.
A
D.
O
Ans:
O
Explanation :
Individuals with type O blood are often called universal donors. They can receive blood only from a group O individual, but can donate blood to individuals of any ABO blood group (i.e., A, B, O or AB).
[13] The enzyme which catalyzes the unwinding of DNA helix during replication is:
A.
Primase
B.
Topoisomerase
C.
Helicase
D.
DNApolymerase
Ans:
Helicase
Explanation :
A type of helicase enzyme called DNA helicase catalyzes the unwinding of the DNA helix at the time of replication. It uses the energy released through hydrolysis of ATP (Adenosine triphosphate) to break the hydrogen bonds between the two strands. The enzyme is needed to separate the two strands of DNA also during transcription and DNA repair.
[14] Blue Revolution is related to:
A.
Space research
B.
Poultry
C.
Drinking water
D.
Fisheries
Ans:
Poultry
Explanation :
Blue Revolution means the adoption of a package programme to increase the production of fish and marine products. The Blue Revolution in India was started in 1970 during the Fifth Five-Year Plan when the Central Government sponsored the Fish. Farmers Development Agency (FFDA). It is related to fish. breeding, fish rearing, fish marketing, and fish ex-port.
[15] Scurvey is caused by:
A.
Vitamin 'D'
B.
Vitamin 'A'
C.
Vitamin 'C'
D.
Vitamin 'B'
Ans:
Vitamin 'C'
Explanation :
Scurvy is a disease resulting from a deficiency of vitamin C (ascorbic acid). It is sometimes also referred to as Barlow's disease, named after Sir Thomas Barlow, a British physician who described it in 1883. Scurvy can be prevented by consuming enough vitamin C, either in the diet or as a supplement.
[16] Linseed is obtained from -
A.
Castor
B.
Flax
C.
Groundnut
D.
Sesame
Ans:
Flax
Explanation :
Linseed are the seeds of the flax plant, which are the source of linseed oil and linseed cake. Flax is a member of the genus Linum in the family Linaceae. Linseed is one of the most potent sources of omega 3 fatty acids found in nature.
[17] Which of the following organism possesses characteristics of a plant and an animal?
A.
Euglena
B.
Mycoplasma.
C.
Paramecium
D.
Chlorella
Ans:
Euglena
Explanation :
Most species of Euglena have photosynthesizing chloroplasts within the body of the cell, which enable them to feed by autotrophy (making energy-containing organic molecules from inorganic raw material through the use of an energy source such as sun-light), like plants. However, they can also take nourishment heterotrophically (making use of food that comes from other organisms in the form of fats, carbohydrates, and proteins), like animals. So Euglena have features of both animals and plants.
[18] Which one of the following features is absent in a virus?
A.
reproduce within host cell
B.
presence of cell wall
C.
fully parasitic in nature
D.
presence of either DNA or
Ans:
presence of cell wall
Explanation :
A virus has a simple structure. It has no internal cellular structure, no cell wall or cell membrane, just the protein coat that holds the string of nucleic acid. It is made only of a nucleic acid + a protein coat. A cell wall is a layer located outside the cell membrane found in plants, fungi, bacteria, algae, and archaea.
[19] The colour of the carrots is due to the presence of -
A.
Carotene
B.
Chlorophyll
C.
Phycocyanin
D.
Phycoerythirn
Ans:
Carotene
Explanation :
Carotenes are photosynthetic pigments that are responsible for the orange colour of the carrot, for which this class of chemicals is named. Some carrots are yellow due to Anthocyanins. Carotenes are also responsible for the orange (but not all of the yellow) colours in dry foliage.
[20] Name the vitamin whose deficiency causes excessive bleeding?
A.
Vitamin A
B.
Vitamin B
C.
Vitamin K
D.
Vitamin C
Ans:
Vitamin K
Explanation :
Vitamin K is a group of structurally similar, fat-soluble vitamins that the human body requires for complete synthesis of certain proteins that are prerequisites for blood coagulation.
[21] Study of old age is called -
A.
Gerantalogy
B.
Pedology
C.
Ornithology
D.
Anthropology
Ans:
Gerantalogy
Explanation :
Gerontology is the study of aging and older adults. The science of gerontology has evolved as longevity has improved. Researchers in this field are diverse and are trained in areas such as physiology, social science, psychology, public health, and policy.
[22] Which of the following is also used as a Bio fertilizer?
A.
Rhizobium
B.
Azotobactar
C.
Azospirillum
D.
All of the above
Ans:
All of the above
Explanation :
A Bio fertilizer is a substance which contains living microorganisms which, when applied to seeds, pl ant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. Rhizobium, Azotobacter, Azospirillum and blue green algae are traditionally used as Biofertilizers.
[23] Wings of birds and insects are -
A.
Xenologous
B.
Homologous
C.
Paralogous
D.
Analogous
Ans:
Analogous
Explanation :
Wings of birds and insects are analogous structures used for flight in both types of organisms. But, they have no common ancestral origin at the beginning of their evolutionary development. They show similar function but show no similar structural relationship.
[24] With which one of the following Jacobsons organ is related to?
A.
Vision
B.
Chewing
C.
Smelling
D.
Hearing
Ans:
Smelling
Explanation :
Jacobson's organ, also called vomeronasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a "sense of smell" receptor that is actually not receptive to ordinary odors.
[25] Oxyntic cell is meant for the secretion of -
A.
Pepsin
B.
Enterokinase
C.
Hydrochloric acid
D.
Lactic acid
Ans:
Hydrochloric acid
Explanation :
Parietal cells (also known as oxyntic cells), are the epithelial cells that secrete hydrochloric acid (HCL) and intrinsic factor. These cells are located in the gastric glands found in the stomach. They contain an extensive secretory network from which the HCL is secreted by active transport into the stomach.
Explanation :
In cell biology, a mitochondrion (plural mitochondria) is a membrane-enclosed organelle found in most eukaryotic cells. These organelles range from 0.5 to 1.0 micrometer (ìm) in diameter. Mitochondria are sometimes described as “cellular power plants” because they generate most of the cell’s supply of adenosine triphosphate (ATP), used as a source of chemical energy. In addition to supplying cellular energy, mitochondria are involved in other tasks such as signaling, cellular differentiation, cell death, as well as the control of the cell cycle and cell growth.
[12] A universal donor has the blood group -
A.
B
B.
AB
C.
A
D.
O
Ans:
O
Explanation :
Individuals with type O blood are often called universal donors. They can receive blood only from a group O individual, but can donate blood to individuals of any ABO blood group (i.e., A, B, O or AB).
[13] The enzyme which catalyzes the unwinding of DNA helix during replication is:
A.
Primase
B.
Topoisomerase
C.
Helicase
D.
DNApolymerase
Ans:
Helicase
Explanation :
A type of helicase enzyme called DNA helicase catalyzes the unwinding of the DNA helix at the time of replication. It uses the energy released through hydrolysis of ATP (Adenosine triphosphate) to break the hydrogen bonds between the two strands. The enzyme is needed to separate the two strands of DNA also during transcription and DNA repair.
[14] Blue Revolution is related to:
A.
Space research
B.
Poultry
C.
Drinking water
D.
Fisheries
Ans:
Poultry
Explanation :
Blue Revolution means the adoption of a package programme to increase the production of fish and marine products. The Blue Revolution in India was started in 1970 during the Fifth Five-Year Plan when the Central Government sponsored the Fish. Farmers Development Agency (FFDA). It is related to fish. breeding, fish rearing, fish marketing, and fish ex-port.
[15] Scurvey is caused by:
A.
Vitamin 'D'
B.
Vitamin 'A'
C.
Vitamin 'C'
D.
Vitamin 'B'
Ans:
Vitamin 'C'
Explanation :
Scurvy is a disease resulting from a deficiency of vitamin C (ascorbic acid). It is sometimes also referred to as Barlow's disease, named after Sir Thomas Barlow, a British physician who described it in 1883. Scurvy can be prevented by consuming enough vitamin C, either in the diet or as a supplement.
[16] Linseed is obtained from -
A.
Castor
B.
Flax
C.
Groundnut
D.
Sesame
Ans:
Flax
Explanation :
Linseed are the seeds of the flax plant, which are the source of linseed oil and linseed cake. Flax is a member of the genus Linum in the family Linaceae. Linseed is one of the most potent sources of omega 3 fatty acids found in nature.
[17] Which of the following organism possesses characteristics of a plant and an animal?
A.
Euglena
B.
Mycoplasma.
C.
Paramecium
D.
Chlorella
Ans:
Euglena
Explanation :
Most species of Euglena have photosynthesizing chloroplasts within the body of the cell, which enable them to feed by autotrophy (making energy-containing organic molecules from inorganic raw material through the use of an energy source such as sun-light), like plants. However, they can also take nourishment heterotrophically (making use of food that comes from other organisms in the form of fats, carbohydrates, and proteins), like animals. So Euglena have features of both animals and plants.
[18] Which one of the following features is absent in a virus?
A.
reproduce within host cell
B.
presence of cell wall
C.
fully parasitic in nature
D.
presence of either DNA or
Ans:
presence of cell wall
Explanation :
A virus has a simple structure. It has no internal cellular structure, no cell wall or cell membrane, just the protein coat that holds the string of nucleic acid. It is made only of a nucleic acid + a protein coat. A cell wall is a layer located outside the cell membrane found in plants, fungi, bacteria, algae, and archaea.
[19] The colour of the carrots is due to the presence of -
A.
Carotene
B.
Chlorophyll
C.
Phycocyanin
D.
Phycoerythirn
Ans:
Carotene
Explanation :
Carotenes are photosynthetic pigments that are responsible for the orange colour of the carrot, for which this class of chemicals is named. Some carrots are yellow due to Anthocyanins. Carotenes are also responsible for the orange (but not all of the yellow) colours in dry foliage.
[20] Name the vitamin whose deficiency causes excessive bleeding?
A.
Vitamin A
B.
Vitamin B
C.
Vitamin K
D.
Vitamin C
Ans:
Vitamin K
Explanation :
Vitamin K is a group of structurally similar, fat-soluble vitamins that the human body requires for complete synthesis of certain proteins that are prerequisites for blood coagulation.
[21] Study of old age is called -
A.
Gerantalogy
B.
Pedology
C.
Ornithology
D.
Anthropology
Ans:
Gerantalogy
Explanation :
Gerontology is the study of aging and older adults. The science of gerontology has evolved as longevity has improved. Researchers in this field are diverse and are trained in areas such as physiology, social science, psychology, public health, and policy.
[22] Which of the following is also used as a Bio fertilizer?
A.
Rhizobium
B.
Azotobactar
C.
Azospirillum
D.
All of the above
Ans:
All of the above
Explanation :
A Bio fertilizer is a substance which contains living microorganisms which, when applied to seeds, pl ant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. Rhizobium, Azotobacter, Azospirillum and blue green algae are traditionally used as Biofertilizers.
[23] Wings of birds and insects are -
A.
Xenologous
B.
Homologous
C.
Paralogous
D.
Analogous
Ans:
Analogous
Explanation :
Wings of birds and insects are analogous structures used for flight in both types of organisms. But, they have no common ancestral origin at the beginning of their evolutionary development. They show similar function but show no similar structural relationship.
[24] With which one of the following Jacobsons organ is related to?
A.
Vision
B.
Chewing
C.
Smelling
D.
Hearing
Ans:
Smelling
Explanation :
Jacobson's organ, also called vomeronasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a "sense of smell" receptor that is actually not receptive to ordinary odors.
[25] Oxyntic cell is meant for the secretion of -
A.
Pepsin
B.
Enterokinase
C.
Hydrochloric acid
D.
Lactic acid
Ans:
Hydrochloric acid
Explanation :
Parietal cells (also known as oxyntic cells), are the epithelial cells that secrete hydrochloric acid (HCL) and intrinsic factor. These cells are located in the gastric glands found in the stomach. They contain an extensive secretory network from which the HCL is secreted by active transport into the stomach.
Explanation :
A type of helicase enzyme called DNA helicase catalyzes the unwinding of the DNA helix at the time of replication. It uses the energy released through hydrolysis of ATP (Adenosine triphosphate) to break the hydrogen bonds between the two strands. The enzyme is needed to separate the two strands of DNA also during transcription and DNA repair.
[14] Blue Revolution is related to:
A.
Space research
B.
Poultry
C.
Drinking water
D.
Fisheries
Ans:
Poultry
Explanation :
Blue Revolution means the adoption of a package programme to increase the production of fish and marine products. The Blue Revolution in India was started in 1970 during the Fifth Five-Year Plan when the Central Government sponsored the Fish. Farmers Development Agency (FFDA). It is related to fish. breeding, fish rearing, fish marketing, and fish ex-port.
[15] Scurvey is caused by:
A.
Vitamin 'D'
B.
Vitamin 'A'
C.
Vitamin 'C'
D.
Vitamin 'B'
Ans:
Vitamin 'C'
Explanation :
Scurvy is a disease resulting from a deficiency of vitamin C (ascorbic acid). It is sometimes also referred to as Barlow's disease, named after Sir Thomas Barlow, a British physician who described it in 1883. Scurvy can be prevented by consuming enough vitamin C, either in the diet or as a supplement.
[16] Linseed is obtained from -
A.
Castor
B.
Flax
C.
Groundnut
D.
Sesame
Ans:
Flax
Explanation :
Linseed are the seeds of the flax plant, which are the source of linseed oil and linseed cake. Flax is a member of the genus Linum in the family Linaceae. Linseed is one of the most potent sources of omega 3 fatty acids found in nature.
[17] Which of the following organism possesses characteristics of a plant and an animal?
A.
Euglena
B.
Mycoplasma.
C.
Paramecium
D.
Chlorella
Ans:
Euglena
Explanation :
Most species of Euglena have photosynthesizing chloroplasts within the body of the cell, which enable them to feed by autotrophy (making energy-containing organic molecules from inorganic raw material through the use of an energy source such as sun-light), like plants. However, they can also take nourishment heterotrophically (making use of food that comes from other organisms in the form of fats, carbohydrates, and proteins), like animals. So Euglena have features of both animals and plants.
[18] Which one of the following features is absent in a virus?
A.
reproduce within host cell
B.
presence of cell wall
C.
fully parasitic in nature
D.
presence of either DNA or
Ans:
presence of cell wall
Explanation :
A virus has a simple structure. It has no internal cellular structure, no cell wall or cell membrane, just the protein coat that holds the string of nucleic acid. It is made only of a nucleic acid + a protein coat. A cell wall is a layer located outside the cell membrane found in plants, fungi, bacteria, algae, and archaea.
[19] The colour of the carrots is due to the presence of -
A.
Carotene
B.
Chlorophyll
C.
Phycocyanin
D.
Phycoerythirn
Ans:
Carotene
Explanation :
Carotenes are photosynthetic pigments that are responsible for the orange colour of the carrot, for which this class of chemicals is named. Some carrots are yellow due to Anthocyanins. Carotenes are also responsible for the orange (but not all of the yellow) colours in dry foliage.
[20] Name the vitamin whose deficiency causes excessive bleeding?
A.
Vitamin A
B.
Vitamin B
C.
Vitamin K
D.
Vitamin C
Ans:
Vitamin K
Explanation :
Vitamin K is a group of structurally similar, fat-soluble vitamins that the human body requires for complete synthesis of certain proteins that are prerequisites for blood coagulation.
[21] Study of old age is called -
A.
Gerantalogy
B.
Pedology
C.
Ornithology
D.
Anthropology
Ans:
Gerantalogy
Explanation :
Gerontology is the study of aging and older adults. The science of gerontology has evolved as longevity has improved. Researchers in this field are diverse and are trained in areas such as physiology, social science, psychology, public health, and policy.
[22] Which of the following is also used as a Bio fertilizer?
A.
Rhizobium
B.
Azotobactar
C.
Azospirillum
D.
All of the above
Ans:
All of the above
Explanation :
A Bio fertilizer is a substance which contains living microorganisms which, when applied to seeds, pl ant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. Rhizobium, Azotobacter, Azospirillum and blue green algae are traditionally used as Biofertilizers.
[23] Wings of birds and insects are -
A.
Xenologous
B.
Homologous
C.
Paralogous
D.
Analogous
Ans:
Analogous
Explanation :
Wings of birds and insects are analogous structures used for flight in both types of organisms. But, they have no common ancestral origin at the beginning of their evolutionary development. They show similar function but show no similar structural relationship.
[24] With which one of the following Jacobsons organ is related to?
A.
Vision
B.
Chewing
C.
Smelling
D.
Hearing
Ans:
Smelling
Explanation :
Jacobson's organ, also called vomeronasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a "sense of smell" receptor that is actually not receptive to ordinary odors.
[25] Oxyntic cell is meant for the secretion of -
A.
Pepsin
B.
Enterokinase
C.
Hydrochloric acid
D.
Lactic acid
Ans:
Hydrochloric acid
Explanation :
Parietal cells (also known as oxyntic cells), are the epithelial cells that secrete hydrochloric acid (HCL) and intrinsic factor. These cells are located in the gastric glands found in the stomach. They contain an extensive secretory network from which the HCL is secreted by active transport into the stomach.
Explanation :
Scurvy is a disease resulting from a deficiency of vitamin C (ascorbic acid). It is sometimes also referred to as Barlow's disease, named after Sir Thomas Barlow, a British physician who described it in 1883. Scurvy can be prevented by consuming enough vitamin C, either in the diet or as a supplement.
[16] Linseed is obtained from -
A.
Castor
B.
Flax
C.
Groundnut
D.
Sesame
Ans:
Flax
Explanation :
Linseed are the seeds of the flax plant, which are the source of linseed oil and linseed cake. Flax is a member of the genus Linum in the family Linaceae. Linseed is one of the most potent sources of omega 3 fatty acids found in nature.
[17] Which of the following organism possesses characteristics of a plant and an animal?
A.
Euglena
B.
Mycoplasma.
C.
Paramecium
D.
Chlorella
Ans:
Euglena
Explanation :
Most species of Euglena have photosynthesizing chloroplasts within the body of the cell, which enable them to feed by autotrophy (making energy-containing organic molecules from inorganic raw material through the use of an energy source such as sun-light), like plants. However, they can also take nourishment heterotrophically (making use of food that comes from other organisms in the form of fats, carbohydrates, and proteins), like animals. So Euglena have features of both animals and plants.
[18] Which one of the following features is absent in a virus?
A.
reproduce within host cell
B.
presence of cell wall
C.
fully parasitic in nature
D.
presence of either DNA or
Ans:
presence of cell wall
Explanation :
A virus has a simple structure. It has no internal cellular structure, no cell wall or cell membrane, just the protein coat that holds the string of nucleic acid. It is made only of a nucleic acid + a protein coat. A cell wall is a layer located outside the cell membrane found in plants, fungi, bacteria, algae, and archaea.
[19] The colour of the carrots is due to the presence of -
A.
Carotene
B.
Chlorophyll
C.
Phycocyanin
D.
Phycoerythirn
Ans:
Carotene
Explanation :
Carotenes are photosynthetic pigments that are responsible for the orange colour of the carrot, for which this class of chemicals is named. Some carrots are yellow due to Anthocyanins. Carotenes are also responsible for the orange (but not all of the yellow) colours in dry foliage.
[20] Name the vitamin whose deficiency causes excessive bleeding?
A.
Vitamin A
B.
Vitamin B
C.
Vitamin K
D.
Vitamin C
Ans:
Vitamin K
Explanation :
Vitamin K is a group of structurally similar, fat-soluble vitamins that the human body requires for complete synthesis of certain proteins that are prerequisites for blood coagulation.
[21] Study of old age is called -
A.
Gerantalogy
B.
Pedology
C.
Ornithology
D.
Anthropology
Ans:
Gerantalogy
Explanation :
Gerontology is the study of aging and older adults. The science of gerontology has evolved as longevity has improved. Researchers in this field are diverse and are trained in areas such as physiology, social science, psychology, public health, and policy.
[22] Which of the following is also used as a Bio fertilizer?
A.
Rhizobium
B.
Azotobactar
C.
Azospirillum
D.
All of the above
Ans:
All of the above
Explanation :
A Bio fertilizer is a substance which contains living microorganisms which, when applied to seeds, pl ant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. Rhizobium, Azotobacter, Azospirillum and blue green algae are traditionally used as Biofertilizers.
[23] Wings of birds and insects are -
A.
Xenologous
B.
Homologous
C.
Paralogous
D.
Analogous
Ans:
Analogous
Explanation :
Wings of birds and insects are analogous structures used for flight in both types of organisms. But, they have no common ancestral origin at the beginning of their evolutionary development. They show similar function but show no similar structural relationship.
[24] With which one of the following Jacobsons organ is related to?
A.
Vision
B.
Chewing
C.
Smelling
D.
Hearing
Ans:
Smelling
Explanation :
Jacobson's organ, also called vomeronasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a "sense of smell" receptor that is actually not receptive to ordinary odors.
[25] Oxyntic cell is meant for the secretion of -
A.
Pepsin
B.
Enterokinase
C.
Hydrochloric acid
D.
Lactic acid
Ans:
Hydrochloric acid
Explanation :
Parietal cells (also known as oxyntic cells), are the epithelial cells that secrete hydrochloric acid (HCL) and intrinsic factor. These cells are located in the gastric glands found in the stomach. They contain an extensive secretory network from which the HCL is secreted by active transport into the stomach.
Explanation :
Most species of Euglena have photosynthesizing chloroplasts within the body of the cell, which enable them to feed by autotrophy (making energy-containing organic molecules from inorganic raw material through the use of an energy source such as sun-light), like plants. However, they can also take nourishment heterotrophically (making use of food that comes from other organisms in the form of fats, carbohydrates, and proteins), like animals. So Euglena have features of both animals and plants.
[18] Which one of the following features is absent in a virus?
A.
reproduce within host cell
B.
presence of cell wall
C.
fully parasitic in nature
D.
presence of either DNA or
Ans:
presence of cell wall
Explanation :
A virus has a simple structure. It has no internal cellular structure, no cell wall or cell membrane, just the protein coat that holds the string of nucleic acid. It is made only of a nucleic acid + a protein coat. A cell wall is a layer located outside the cell membrane found in plants, fungi, bacteria, algae, and archaea.
[19] The colour of the carrots is due to the presence of -
A.
Carotene
B.
Chlorophyll
C.
Phycocyanin
D.
Phycoerythirn
Ans:
Carotene
Explanation :
Carotenes are photosynthetic pigments that are responsible for the orange colour of the carrot, for which this class of chemicals is named. Some carrots are yellow due to Anthocyanins. Carotenes are also responsible for the orange (but not all of the yellow) colours in dry foliage.
[20] Name the vitamin whose deficiency causes excessive bleeding?
A.
Vitamin A
B.
Vitamin B
C.
Vitamin K
D.
Vitamin C
Ans:
Vitamin K
Explanation :
Vitamin K is a group of structurally similar, fat-soluble vitamins that the human body requires for complete synthesis of certain proteins that are prerequisites for blood coagulation.
[21] Study of old age is called -
A.
Gerantalogy
B.
Pedology
C.
Ornithology
D.
Anthropology
Ans:
Gerantalogy
Explanation :
Gerontology is the study of aging and older adults. The science of gerontology has evolved as longevity has improved. Researchers in this field are diverse and are trained in areas such as physiology, social science, psychology, public health, and policy.
[22] Which of the following is also used as a Bio fertilizer?
A.
Rhizobium
B.
Azotobactar
C.
Azospirillum
D.
All of the above
Ans:
All of the above
Explanation :
A Bio fertilizer is a substance which contains living microorganisms which, when applied to seeds, pl ant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. Rhizobium, Azotobacter, Azospirillum and blue green algae are traditionally used as Biofertilizers.
[23] Wings of birds and insects are -
A.
Xenologous
B.
Homologous
C.
Paralogous
D.
Analogous
Ans:
Analogous
Explanation :
Wings of birds and insects are analogous structures used for flight in both types of organisms. But, they have no common ancestral origin at the beginning of their evolutionary development. They show similar function but show no similar structural relationship.
[24] With which one of the following Jacobsons organ is related to?
A.
Vision
B.
Chewing
C.
Smelling
D.
Hearing
Ans:
Smelling
Explanation :
Jacobson's organ, also called vomeronasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a "sense of smell" receptor that is actually not receptive to ordinary odors.
[25] Oxyntic cell is meant for the secretion of -
A.
Pepsin
B.
Enterokinase
C.
Hydrochloric acid
D.
Lactic acid
Ans:
Hydrochloric acid
Explanation :
Parietal cells (also known as oxyntic cells), are the epithelial cells that secrete hydrochloric acid (HCL) and intrinsic factor. These cells are located in the gastric glands found in the stomach. They contain an extensive secretory network from which the HCL is secreted by active transport into the stomach.
Explanation :
Carotenes are photosynthetic pigments that are responsible for the orange colour of the carrot, for which this class of chemicals is named. Some carrots are yellow due to Anthocyanins. Carotenes are also responsible for the orange (but not all of the yellow) colours in dry foliage.
[20] Name the vitamin whose deficiency causes excessive bleeding?
A.
Vitamin A
B.
Vitamin B
C.
Vitamin K
D.
Vitamin C
Ans:
Vitamin K
Explanation :
Vitamin K is a group of structurally similar, fat-soluble vitamins that the human body requires for complete synthesis of certain proteins that are prerequisites for blood coagulation.
[21] Study of old age is called -
A.
Gerantalogy
B.
Pedology
C.
Ornithology
D.
Anthropology
Ans:
Gerantalogy
Explanation :
Gerontology is the study of aging and older adults. The science of gerontology has evolved as longevity has improved. Researchers in this field are diverse and are trained in areas such as physiology, social science, psychology, public health, and policy.
[22] Which of the following is also used as a Bio fertilizer?
A.
Rhizobium
B.
Azotobactar
C.
Azospirillum
D.
All of the above
Ans:
All of the above
Explanation :
A Bio fertilizer is a substance which contains living microorganisms which, when applied to seeds, pl ant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. Rhizobium, Azotobacter, Azospirillum and blue green algae are traditionally used as Biofertilizers.
[23] Wings of birds and insects are -
A.
Xenologous
B.
Homologous
C.
Paralogous
D.
Analogous
Ans:
Analogous
Explanation :
Wings of birds and insects are analogous structures used for flight in both types of organisms. But, they have no common ancestral origin at the beginning of their evolutionary development. They show similar function but show no similar structural relationship.
[24] With which one of the following Jacobsons organ is related to?
A.
Vision
B.
Chewing
C.
Smelling
D.
Hearing
Ans:
Smelling
Explanation :
Jacobson's organ, also called vomeronasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a "sense of smell" receptor that is actually not receptive to ordinary odors.
[25] Oxyntic cell is meant for the secretion of -
A.
Pepsin
B.
Enterokinase
C.
Hydrochloric acid
D.
Lactic acid
Ans:
Hydrochloric acid
Explanation :
Parietal cells (also known as oxyntic cells), are the epithelial cells that secrete hydrochloric acid (HCL) and intrinsic factor. These cells are located in the gastric glands found in the stomach. They contain an extensive secretory network from which the HCL is secreted by active transport into the stomach.
Explanation :
Gerontology is the study of aging and older adults. The science of gerontology has evolved as longevity has improved. Researchers in this field are diverse and are trained in areas such as physiology, social science, psychology, public health, and policy.
[22] Which of the following is also used as a Bio fertilizer?
A.
Rhizobium
B.
Azotobactar
C.
Azospirillum
D.
All of the above
Ans:
All of the above
Explanation :
A Bio fertilizer is a substance which contains living microorganisms which, when applied to seeds, pl ant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. Rhizobium, Azotobacter, Azospirillum and blue green algae are traditionally used as Biofertilizers.
[23] Wings of birds and insects are -
A.
Xenologous
B.
Homologous
C.
Paralogous
D.
Analogous
Ans:
Analogous
Explanation :
Wings of birds and insects are analogous structures used for flight in both types of organisms. But, they have no common ancestral origin at the beginning of their evolutionary development. They show similar function but show no similar structural relationship.
[24] With which one of the following Jacobsons organ is related to?
A.
Vision
B.
Chewing
C.
Smelling
D.
Hearing
Ans:
Smelling
Explanation :
Jacobson's organ, also called vomeronasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a "sense of smell" receptor that is actually not receptive to ordinary odors.
[25] Oxyntic cell is meant for the secretion of -
A.
Pepsin
B.
Enterokinase
C.
Hydrochloric acid
D.
Lactic acid
Ans:
Hydrochloric acid
Explanation :
Parietal cells (also known as oxyntic cells), are the epithelial cells that secrete hydrochloric acid (HCL) and intrinsic factor. These cells are located in the gastric glands found in the stomach. They contain an extensive secretory network from which the HCL is secreted by active transport into the stomach.
Explanation :
Wings of birds and insects are analogous structures used for flight in both types of organisms. But, they have no common ancestral origin at the beginning of their evolutionary development. They show similar function but show no similar structural relationship.
[24] With which one of the following Jacobsons organ is related to?
A.
Vision
B.
Chewing
C.
Smelling
D.
Hearing
Ans:
Smelling
Explanation :
Jacobson's organ, also called vomeronasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a "sense of smell" receptor that is actually not receptive to ordinary odors.
[25] Oxyntic cell is meant for the secretion of -
A.
Pepsin
B.
Enterokinase
C.
Hydrochloric acid
D.
Lactic acid
Ans:
Hydrochloric acid
Explanation :
Parietal cells (also known as oxyntic cells), are the epithelial cells that secrete hydrochloric acid (HCL) and intrinsic factor. These cells are located in the gastric glands found in the stomach. They contain an extensive secretory network from which the HCL is secreted by active transport into the stomach.
Explanation :
Parietal cells (also known as oxyntic cells), are the epithelial cells that secrete hydrochloric acid (HCL) and intrinsic factor. These cells are located in the gastric glands found in the stomach. They contain an extensive secretory network from which the HCL is secreted by active transport into the stomach.