[1] Webbed neck is a characteristic of -
A.
Down's syndrome
B.
Turner's syndrome
C.
Klinefelter's syndrome
D.
Cri-du-chat syndrome
Ans:
Turner's syndrome
Explanation :
A webbed neck, or pterygium colli deformity, is a congenital skin fold that runs along the sides of the neck down to the shouldersit is a feature of Turner syndrome and Noonan syndrome, as well as the rarer Klippel-Feil syndrome. Turner Syndrome (TS) is a condition in which a female is partly or completely missing an X chromosome.
[2] Compounds that are needed for enzymes to function properly are -
A.
Steroids
B.
Vitamins
C.
Heavy metals
D.
Buffers
Ans:
Vitamins
Explanation :
Vitamins are organic molecules that function in a wide variety of capacities within the body. The most prominent function of the vitamins is to serve as cofactors (co-enzymes) for enzymatic reactions. If an enzyme lacks the essential vitamin, it cannot perform its catalyst function properly.
[3] The tree popularly known as 'Green Gold', but which is an ecological disaster, is -
A.
Banyan
B.
Peepal
C.
Eucalyptus
D.
None of these
Ans:
Eucalyptus
Explanation :
Several trees such as Neem, bamboo, eucalyptus, etc., are known as 'green gold.' Eucalyptus is called green gold because of its widespread use in the international wood products and pulp industry. However, the eucalyptus tree has been accused of being an environmental disaster with its thirst for water and propensity towards soil depletion. Be-sides, it is host to Cryptococcus's, a fungus that attacks the human nervous system.
[4] People with Down's syndrome invariably affected by:
A.
Huntington's disease
B.
Alzheimer's disease
C.
Meningitis
D.
Brain haemorrhage
Ans:
Alzheimer's disease
Explanation :
The best-known and most common chromosome abnormality in humans is Down's syndrome, a condition associated with an extra chromosome 21. Down's syndrome individuals also almost invariably develop Alzheimer's disease, a form of dementia that is fairly common among the elderly. People with Down's syndrome develop this disease in their fourth or fifth decade of life, much sooner than other people
[5] Damping off of seedlings is caused by -
A.
Peronospola parasitica
B.
Albugo Candida
C.
Phytophthora infestans
D.
Pythium debaryanum
Ans:
Pythium debaryanum
Explanation :
Damping off is a horticultural disease or condition, caused by a number of different pathogens that kill or weaken seeds or seedlings before or after they germinate. Pythium, a genus of parasitic oomycete, are most often responsible for damping-off. Along with Rhizoctonia solani, attacks by Pythium are most associated with producing roughly circular patcties of dead seedlings.
[6] Which among the following is the sweetest sugar?
A.
lacrose
B.
fructose
C.
maltos
D.
glucose
Ans:
fructose
Explanation :
There are primarily three types of sugar: glucose, fructose and sucrose. Of the three sugars, fructose is the sweetest and glucose the least sweet, so typically less fructose can be used than table sugar (sucrose) - if sucrose has a sweetness of one, fructose is 1.7 and glucose 0.74. Fructose is known as the fruit sugar as its make source in the diet is fruits and vegetables.
[7] An eazyme produced by HIV that allows the integration of HIV DNA into the host cell's DNA is -
A.
Ligase
B.
Integrase
C.
Helicase
D.
DNA gyrase
Ans:
Integrase
Explanation :
HIV's enzyme for inserting the DNA version of its genome into the host cell DNA is called its "integrase". HIV-1 integrase catalyzes the "cut-and-paste" action of clipping the host DNA and joining the proyiral genome to the clipped ends. It is also produced by viruses containing double-stranded DNAs for the same purpose.
[8] Interferons are synthesized in response to -
A.
Bacteria
B.
Fungi
C.
Mycoplasma
D.
Virus
Ans:
Virus
Explanation :
Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, parasites, or tumor cells. Interferon synthesis occurs primarily in response to viral single-stranded or double stranded RNA that are either the genetic material of RNA viruses or a product of viral transcription. Interferons are named for their ability to "interfere" with viral replication by protecting cells from virus infections.
[9] The resources which are obtained from bio sphere and have life are -
A.
Potential resources
B.
Biotic resources
C.
Abiatic resources
D.
Renewable resources
Ans:
Biotic resources
Explanation :
Biotic resources describe living or once living resources of a community; for example organisms, such as plants and animals. They are obtained from the biosphere and have life. The resources which are composed of non-living things are called Abiotic Resources. For example, water, minerals, metals, wind, solar energy etc.
[10] Which of the following is a fibrous protein?
A.
Haemoglobin
B.
Albumin
C.
Keratin
D.
Enzymes
Ans:
Keratin
Explanation :
Keratin is a family of fibrous structural proteins. It is the key structural material making up the outer layer of human skin. It is also the key structural component of hair and nails. Another example of fibrous protein is collagen.
[11] Typhoid fever is caused by -
A.
Bacteria
B.
Virus
C.
Protozoa
D.
Fwagi
Ans:
Bacteria
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi.
[12] Pleura is the covering of -
A.
Lung
B.
Liver
C.
Kidney
D.
Heart
Ans:
Lung
Explanation :
Pleura is a large, thin sheet of tissue that wraps around the outside of lungs. It is an exceedingly delicate serous membrane that is arranged in the form of a closed invaginated sac. The pleura are only visible when there is an abnormality present.
[13] Which drug is used to cure Glaucoma?
A.
Fexofenadine
B.
Ketoconazole
C.
Latanoprost
D.
Ibuprofen
Ans:
Latanoprost
Explanation :
Latanoprost, sold under the brand name Xalatan, is a medication used to treat increased pressure inside the eye. This includes ocular hypertension and open angle glaucoma.
[14] German Silver is an alloy of -
A.
Copper, Silver and Zinc
B.
Copper, Nickel and Zinc
C.
Mid-brain
D.
Fore-brain
Ans:
Copper, Nickel and Zinc
Explanation :
Nickel silver, also known as German silver, Argentan, new silver, nickel brass, albata, alpacca, or electrum, is a copper alloy with nickel and often zinc. The usual formulation is 60% copper, 20% nickel and 20% zinc. Nickel silver is named for its silvery appearance, but it contains no elemental silver unles s plated. The name “German silver” refers to its development by 19th-century German metalworkers in imitation of the Chinese alloy known as paktong (Cupronickel) All modern, commercially important nickel silvers (such as those standardized under ASTM B122) contain significant amounts of zinc, and are sometimes considered a subset of brass. It is used in zippers, better-quality keys, costume jewellery, for making musical instruments (e.g., cymbals, saxophones), and is preferred for the track in electrically powered model railway layouts, as its oxide is conductive. It is widely used in the production of coins (e.g. Portuguese escudo and the former GDR marks,). Its industrial and technical uses include marine fittings and plumbing fixtures for its corrosion resistance, and heating coils for its high electrical resistance.
[15] The first stable product of photosynthesis is -
A.
Starch
B.
Sucrose
C.
Phosphoglyceric acid
D.
Glucose
Ans:
Phosphoglyceric acid
Explanation :
The first product of photosynthesis is a three carbon compound called phosphoglyceric acid and phosphoglyceraldehyde. Almost immediately, two of these join to form a glucose molecule. Certain herbaceous plants such as sugarcane, corn, and sorghum, form as the first products of photosynthesis not three carbon but four-carbon compounds— oxalacetic, malic, and aspartic acids.
[16] The old and worn-out red blood corpuscles are destroyed in -
A.
Liver
B.
Stomach
C.
Bone marrow
D.
Spleen
Ans:
Spleen
Explanation :
Old, "worn out" RBCs are mostly broken down in the spleen. It is the organ that filters the blood, checks it for infection, and removes undesirable substances. RBCs are produced in the red bone marrow of bones. The average life span of erythrocytes is about 120 days.
[17] Self pollination will lead to -
A.
inbreeding
B.
rare breeding
C.
overbreeding
D.
outbreeding
Ans:
inbreeding
Explanation :
Self-pollination can lead to inbreeding depression, or the reduced health of the species, due to the breeding of related specimens. This is why many flowers that could potentially self-pollinate have a built-in mechanism to avoid it.
[18] In any spreadsheet, the address of the first cell is -
A.
OA
B.
TIA
C.
AO
D.
Al
Ans:
Al
Explanation :
There are rows and columns in any spreadsheet. Each column has a capital letter on the top to show what column it is. Each row has a number to the immediate left of the first column, to show what row it is. So address of the cell in the first column, first row is A1.
[19] Which one of the following is correctly matched?
A.
Secondary consumer - Grass
B.
Decomposer - Bacteria
C.
Producer - Deer
D.
Primary consumer - Leopard
Ans:
Decomposer - Bacteria
Explanation :
When plants and animals die, they become food for decomposers like bacteria, fungi and earthworms. The dead things that are eaten by decomposers are called detritus which means "garbage".
[20] When a single gene controls the expression of more than one character, it is said to be -
A.
Heterotrophic
B.
Autotrophic
C.
Allotropic
D.
Pleiotropic
Ans:
Pleiotropic
Explanation :
When a single gene has an effect on the expression of two or more phenotypic traits, it is said to have a pleiotropic effect on the traits. For example, testosterone controls the development of what are referred to as secondary sexual characteristics, but it also relates to behavioral traits like aggression. Thus, a gene that controls the levels of testosterone would have a pleiotropic effect on the expression of many secondary sexual traits which are morphological, as well as behavioral.
[21] The plants which grow well, only in light are known as -
A.
Sciophilous
B.
Xerophytes
C.
Heliophytes
D.
Epiphytes
Ans:
Heliophytes
Explanation :
In botany, heliophytes refer to plants that thrive in bright sunlight; while those growing best in shade are known as sciophytes. Heliophytes are capable of a more efficient use of high light intensities than sciophytes. Examples of heliophytes are sugar cane, sunflower and maize.
[22] Green blocks are referred to -
A.
Green cover
B.
Green Ministry
C.
Bio-bricks
D.
Pro-biotic curd
Ans:
Bio-bricks
Explanation :
Green Blocks are comprised of blocks throughout the neighborhood that pledge to be greener by working together to improve quality of life, clean, and beautify 'their neighborhood. They are also known as bio-bricks.
[23] Which one of the following is an egg laying mammal?
A.
Sloth
B.
Duck - billed platypus
C.
Kangaroo
D.
Bandicoot
Ans:
Duck - billed platypus
Explanation :
The platypus, also known as the duck-billed platypus, is a semi-aquatic egg-laying mammal endemic to eastern Australia. It is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
[24] The type of kidneys present in frog are -
A.
Mesonephros
B.
Metanephros
C.
Archinephros
D.
Pronephros
Ans:
Mesonephros
Explanation :
In the frog, mesonephros is the functional kidney in embryonic as well as adult stage and mesonephric duct functions as both urinary and genital duct. Tubules of the anterior region of kidney get connected to testis to collect spermatozoa, while the posterior region remains as functional kidney and transports urinary wastes to the exterior.
[25] The International Commission on Zoological Nomenclature was established in -
A.
1895
B.
1988
C.
2001
D.
1664
Ans:
1895
Explanation :
The International Commission on Zoological Nomenclature (ICZN) was founded in 1895. It provides and regulates a uniform system of zoological nomenclature ensuring that every animal has a unique and universally accepted scientific name.
Explanation :
A webbed neck, or pterygium colli deformity, is a congenital skin fold that runs along the sides of the neck down to the shouldersit is a feature of Turner syndrome and Noonan syndrome, as well as the rarer Klippel-Feil syndrome. Turner Syndrome (TS) is a condition in which a female is partly or completely missing an X chromosome.
[2] Compounds that are needed for enzymes to function properly are -
A.
Steroids
B.
Vitamins
C.
Heavy metals
D.
Buffers
Ans:
Vitamins
Explanation :
Vitamins are organic molecules that function in a wide variety of capacities within the body. The most prominent function of the vitamins is to serve as cofactors (co-enzymes) for enzymatic reactions. If an enzyme lacks the essential vitamin, it cannot perform its catalyst function properly.
[3] The tree popularly known as 'Green Gold', but which is an ecological disaster, is -
A.
Banyan
B.
Peepal
C.
Eucalyptus
D.
None of these
Ans:
Eucalyptus
Explanation :
Several trees such as Neem, bamboo, eucalyptus, etc., are known as 'green gold.' Eucalyptus is called green gold because of its widespread use in the international wood products and pulp industry. However, the eucalyptus tree has been accused of being an environmental disaster with its thirst for water and propensity towards soil depletion. Be-sides, it is host to Cryptococcus's, a fungus that attacks the human nervous system.
[4] People with Down's syndrome invariably affected by:
A.
Huntington's disease
B.
Alzheimer's disease
C.
Meningitis
D.
Brain haemorrhage
Ans:
Alzheimer's disease
Explanation :
The best-known and most common chromosome abnormality in humans is Down's syndrome, a condition associated with an extra chromosome 21. Down's syndrome individuals also almost invariably develop Alzheimer's disease, a form of dementia that is fairly common among the elderly. People with Down's syndrome develop this disease in their fourth or fifth decade of life, much sooner than other people
[5] Damping off of seedlings is caused by -
A.
Peronospola parasitica
B.
Albugo Candida
C.
Phytophthora infestans
D.
Pythium debaryanum
Ans:
Pythium debaryanum
Explanation :
Damping off is a horticultural disease or condition, caused by a number of different pathogens that kill or weaken seeds or seedlings before or after they germinate. Pythium, a genus of parasitic oomycete, are most often responsible for damping-off. Along with Rhizoctonia solani, attacks by Pythium are most associated with producing roughly circular patcties of dead seedlings.
[6] Which among the following is the sweetest sugar?
A.
lacrose
B.
fructose
C.
maltos
D.
glucose
Ans:
fructose
Explanation :
There are primarily three types of sugar: glucose, fructose and sucrose. Of the three sugars, fructose is the sweetest and glucose the least sweet, so typically less fructose can be used than table sugar (sucrose) - if sucrose has a sweetness of one, fructose is 1.7 and glucose 0.74. Fructose is known as the fruit sugar as its make source in the diet is fruits and vegetables.
[7] An eazyme produced by HIV that allows the integration of HIV DNA into the host cell's DNA is -
A.
Ligase
B.
Integrase
C.
Helicase
D.
DNA gyrase
Ans:
Integrase
Explanation :
HIV's enzyme for inserting the DNA version of its genome into the host cell DNA is called its "integrase". HIV-1 integrase catalyzes the "cut-and-paste" action of clipping the host DNA and joining the proyiral genome to the clipped ends. It is also produced by viruses containing double-stranded DNAs for the same purpose.
[8] Interferons are synthesized in response to -
A.
Bacteria
B.
Fungi
C.
Mycoplasma
D.
Virus
Ans:
Virus
Explanation :
Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, parasites, or tumor cells. Interferon synthesis occurs primarily in response to viral single-stranded or double stranded RNA that are either the genetic material of RNA viruses or a product of viral transcription. Interferons are named for their ability to "interfere" with viral replication by protecting cells from virus infections.
[9] The resources which are obtained from bio sphere and have life are -
A.
Potential resources
B.
Biotic resources
C.
Abiatic resources
D.
Renewable resources
Ans:
Biotic resources
Explanation :
Biotic resources describe living or once living resources of a community; for example organisms, such as plants and animals. They are obtained from the biosphere and have life. The resources which are composed of non-living things are called Abiotic Resources. For example, water, minerals, metals, wind, solar energy etc.
[10] Which of the following is a fibrous protein?
A.
Haemoglobin
B.
Albumin
C.
Keratin
D.
Enzymes
Ans:
Keratin
Explanation :
Keratin is a family of fibrous structural proteins. It is the key structural material making up the outer layer of human skin. It is also the key structural component of hair and nails. Another example of fibrous protein is collagen.
[11] Typhoid fever is caused by -
A.
Bacteria
B.
Virus
C.
Protozoa
D.
Fwagi
Ans:
Bacteria
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi.
[12] Pleura is the covering of -
A.
Lung
B.
Liver
C.
Kidney
D.
Heart
Ans:
Lung
Explanation :
Pleura is a large, thin sheet of tissue that wraps around the outside of lungs. It is an exceedingly delicate serous membrane that is arranged in the form of a closed invaginated sac. The pleura are only visible when there is an abnormality present.
[13] Which drug is used to cure Glaucoma?
A.
Fexofenadine
B.
Ketoconazole
C.
Latanoprost
D.
Ibuprofen
Ans:
Latanoprost
Explanation :
Latanoprost, sold under the brand name Xalatan, is a medication used to treat increased pressure inside the eye. This includes ocular hypertension and open angle glaucoma.
[14] German Silver is an alloy of -
A.
Copper, Silver and Zinc
B.
Copper, Nickel and Zinc
C.
Mid-brain
D.
Fore-brain
Ans:
Copper, Nickel and Zinc
Explanation :
Nickel silver, also known as German silver, Argentan, new silver, nickel brass, albata, alpacca, or electrum, is a copper alloy with nickel and often zinc. The usual formulation is 60% copper, 20% nickel and 20% zinc. Nickel silver is named for its silvery appearance, but it contains no elemental silver unles s plated. The name “German silver” refers to its development by 19th-century German metalworkers in imitation of the Chinese alloy known as paktong (Cupronickel) All modern, commercially important nickel silvers (such as those standardized under ASTM B122) contain significant amounts of zinc, and are sometimes considered a subset of brass. It is used in zippers, better-quality keys, costume jewellery, for making musical instruments (e.g., cymbals, saxophones), and is preferred for the track in electrically powered model railway layouts, as its oxide is conductive. It is widely used in the production of coins (e.g. Portuguese escudo and the former GDR marks,). Its industrial and technical uses include marine fittings and plumbing fixtures for its corrosion resistance, and heating coils for its high electrical resistance.
[15] The first stable product of photosynthesis is -
A.
Starch
B.
Sucrose
C.
Phosphoglyceric acid
D.
Glucose
Ans:
Phosphoglyceric acid
Explanation :
The first product of photosynthesis is a three carbon compound called phosphoglyceric acid and phosphoglyceraldehyde. Almost immediately, two of these join to form a glucose molecule. Certain herbaceous plants such as sugarcane, corn, and sorghum, form as the first products of photosynthesis not three carbon but four-carbon compounds— oxalacetic, malic, and aspartic acids.
[16] The old and worn-out red blood corpuscles are destroyed in -
A.
Liver
B.
Stomach
C.
Bone marrow
D.
Spleen
Ans:
Spleen
Explanation :
Old, "worn out" RBCs are mostly broken down in the spleen. It is the organ that filters the blood, checks it for infection, and removes undesirable substances. RBCs are produced in the red bone marrow of bones. The average life span of erythrocytes is about 120 days.
[17] Self pollination will lead to -
A.
inbreeding
B.
rare breeding
C.
overbreeding
D.
outbreeding
Ans:
inbreeding
Explanation :
Self-pollination can lead to inbreeding depression, or the reduced health of the species, due to the breeding of related specimens. This is why many flowers that could potentially self-pollinate have a built-in mechanism to avoid it.
[18] In any spreadsheet, the address of the first cell is -
A.
OA
B.
TIA
C.
AO
D.
Al
Ans:
Al
Explanation :
There are rows and columns in any spreadsheet. Each column has a capital letter on the top to show what column it is. Each row has a number to the immediate left of the first column, to show what row it is. So address of the cell in the first column, first row is A1.
[19] Which one of the following is correctly matched?
A.
Secondary consumer - Grass
B.
Decomposer - Bacteria
C.
Producer - Deer
D.
Primary consumer - Leopard
Ans:
Decomposer - Bacteria
Explanation :
When plants and animals die, they become food for decomposers like bacteria, fungi and earthworms. The dead things that are eaten by decomposers are called detritus which means "garbage".
[20] When a single gene controls the expression of more than one character, it is said to be -
A.
Heterotrophic
B.
Autotrophic
C.
Allotropic
D.
Pleiotropic
Ans:
Pleiotropic
Explanation :
When a single gene has an effect on the expression of two or more phenotypic traits, it is said to have a pleiotropic effect on the traits. For example, testosterone controls the development of what are referred to as secondary sexual characteristics, but it also relates to behavioral traits like aggression. Thus, a gene that controls the levels of testosterone would have a pleiotropic effect on the expression of many secondary sexual traits which are morphological, as well as behavioral.
[21] The plants which grow well, only in light are known as -
A.
Sciophilous
B.
Xerophytes
C.
Heliophytes
D.
Epiphytes
Ans:
Heliophytes
Explanation :
In botany, heliophytes refer to plants that thrive in bright sunlight; while those growing best in shade are known as sciophytes. Heliophytes are capable of a more efficient use of high light intensities than sciophytes. Examples of heliophytes are sugar cane, sunflower and maize.
[22] Green blocks are referred to -
A.
Green cover
B.
Green Ministry
C.
Bio-bricks
D.
Pro-biotic curd
Ans:
Bio-bricks
Explanation :
Green Blocks are comprised of blocks throughout the neighborhood that pledge to be greener by working together to improve quality of life, clean, and beautify 'their neighborhood. They are also known as bio-bricks.
[23] Which one of the following is an egg laying mammal?
A.
Sloth
B.
Duck - billed platypus
C.
Kangaroo
D.
Bandicoot
Ans:
Duck - billed platypus
Explanation :
The platypus, also known as the duck-billed platypus, is a semi-aquatic egg-laying mammal endemic to eastern Australia. It is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
[24] The type of kidneys present in frog are -
A.
Mesonephros
B.
Metanephros
C.
Archinephros
D.
Pronephros
Ans:
Mesonephros
Explanation :
In the frog, mesonephros is the functional kidney in embryonic as well as adult stage and mesonephric duct functions as both urinary and genital duct. Tubules of the anterior region of kidney get connected to testis to collect spermatozoa, while the posterior region remains as functional kidney and transports urinary wastes to the exterior.
[25] The International Commission on Zoological Nomenclature was established in -
A.
1895
B.
1988
C.
2001
D.
1664
Ans:
1895
Explanation :
The International Commission on Zoological Nomenclature (ICZN) was founded in 1895. It provides and regulates a uniform system of zoological nomenclature ensuring that every animal has a unique and universally accepted scientific name.
Explanation :
Several trees such as Neem, bamboo, eucalyptus, etc., are known as 'green gold.' Eucalyptus is called green gold because of its widespread use in the international wood products and pulp industry. However, the eucalyptus tree has been accused of being an environmental disaster with its thirst for water and propensity towards soil depletion. Be-sides, it is host to Cryptococcus's, a fungus that attacks the human nervous system.
[4] People with Down's syndrome invariably affected by:
A.
Huntington's disease
B.
Alzheimer's disease
C.
Meningitis
D.
Brain haemorrhage
Ans:
Alzheimer's disease
Explanation :
The best-known and most common chromosome abnormality in humans is Down's syndrome, a condition associated with an extra chromosome 21. Down's syndrome individuals also almost invariably develop Alzheimer's disease, a form of dementia that is fairly common among the elderly. People with Down's syndrome develop this disease in their fourth or fifth decade of life, much sooner than other people
[5] Damping off of seedlings is caused by -
A.
Peronospola parasitica
B.
Albugo Candida
C.
Phytophthora infestans
D.
Pythium debaryanum
Ans:
Pythium debaryanum
Explanation :
Damping off is a horticultural disease or condition, caused by a number of different pathogens that kill or weaken seeds or seedlings before or after they germinate. Pythium, a genus of parasitic oomycete, are most often responsible for damping-off. Along with Rhizoctonia solani, attacks by Pythium are most associated with producing roughly circular patcties of dead seedlings.
[6] Which among the following is the sweetest sugar?
A.
lacrose
B.
fructose
C.
maltos
D.
glucose
Ans:
fructose
Explanation :
There are primarily three types of sugar: glucose, fructose and sucrose. Of the three sugars, fructose is the sweetest and glucose the least sweet, so typically less fructose can be used than table sugar (sucrose) - if sucrose has a sweetness of one, fructose is 1.7 and glucose 0.74. Fructose is known as the fruit sugar as its make source in the diet is fruits and vegetables.
[7] An eazyme produced by HIV that allows the integration of HIV DNA into the host cell's DNA is -
A.
Ligase
B.
Integrase
C.
Helicase
D.
DNA gyrase
Ans:
Integrase
Explanation :
HIV's enzyme for inserting the DNA version of its genome into the host cell DNA is called its "integrase". HIV-1 integrase catalyzes the "cut-and-paste" action of clipping the host DNA and joining the proyiral genome to the clipped ends. It is also produced by viruses containing double-stranded DNAs for the same purpose.
[8] Interferons are synthesized in response to -
A.
Bacteria
B.
Fungi
C.
Mycoplasma
D.
Virus
Ans:
Virus
Explanation :
Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, parasites, or tumor cells. Interferon synthesis occurs primarily in response to viral single-stranded or double stranded RNA that are either the genetic material of RNA viruses or a product of viral transcription. Interferons are named for their ability to "interfere" with viral replication by protecting cells from virus infections.
[9] The resources which are obtained from bio sphere and have life are -
A.
Potential resources
B.
Biotic resources
C.
Abiatic resources
D.
Renewable resources
Ans:
Biotic resources
Explanation :
Biotic resources describe living or once living resources of a community; for example organisms, such as plants and animals. They are obtained from the biosphere and have life. The resources which are composed of non-living things are called Abiotic Resources. For example, water, minerals, metals, wind, solar energy etc.
[10] Which of the following is a fibrous protein?
A.
Haemoglobin
B.
Albumin
C.
Keratin
D.
Enzymes
Ans:
Keratin
Explanation :
Keratin is a family of fibrous structural proteins. It is the key structural material making up the outer layer of human skin. It is also the key structural component of hair and nails. Another example of fibrous protein is collagen.
[11] Typhoid fever is caused by -
A.
Bacteria
B.
Virus
C.
Protozoa
D.
Fwagi
Ans:
Bacteria
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi.
[12] Pleura is the covering of -
A.
Lung
B.
Liver
C.
Kidney
D.
Heart
Ans:
Lung
Explanation :
Pleura is a large, thin sheet of tissue that wraps around the outside of lungs. It is an exceedingly delicate serous membrane that is arranged in the form of a closed invaginated sac. The pleura are only visible when there is an abnormality present.
[13] Which drug is used to cure Glaucoma?
A.
Fexofenadine
B.
Ketoconazole
C.
Latanoprost
D.
Ibuprofen
Ans:
Latanoprost
Explanation :
Latanoprost, sold under the brand name Xalatan, is a medication used to treat increased pressure inside the eye. This includes ocular hypertension and open angle glaucoma.
[14] German Silver is an alloy of -
A.
Copper, Silver and Zinc
B.
Copper, Nickel and Zinc
C.
Mid-brain
D.
Fore-brain
Ans:
Copper, Nickel and Zinc
Explanation :
Nickel silver, also known as German silver, Argentan, new silver, nickel brass, albata, alpacca, or electrum, is a copper alloy with nickel and often zinc. The usual formulation is 60% copper, 20% nickel and 20% zinc. Nickel silver is named for its silvery appearance, but it contains no elemental silver unles s plated. The name “German silver” refers to its development by 19th-century German metalworkers in imitation of the Chinese alloy known as paktong (Cupronickel) All modern, commercially important nickel silvers (such as those standardized under ASTM B122) contain significant amounts of zinc, and are sometimes considered a subset of brass. It is used in zippers, better-quality keys, costume jewellery, for making musical instruments (e.g., cymbals, saxophones), and is preferred for the track in electrically powered model railway layouts, as its oxide is conductive. It is widely used in the production of coins (e.g. Portuguese escudo and the former GDR marks,). Its industrial and technical uses include marine fittings and plumbing fixtures for its corrosion resistance, and heating coils for its high electrical resistance.
[15] The first stable product of photosynthesis is -
A.
Starch
B.
Sucrose
C.
Phosphoglyceric acid
D.
Glucose
Ans:
Phosphoglyceric acid
Explanation :
The first product of photosynthesis is a three carbon compound called phosphoglyceric acid and phosphoglyceraldehyde. Almost immediately, two of these join to form a glucose molecule. Certain herbaceous plants such as sugarcane, corn, and sorghum, form as the first products of photosynthesis not three carbon but four-carbon compounds— oxalacetic, malic, and aspartic acids.
[16] The old and worn-out red blood corpuscles are destroyed in -
A.
Liver
B.
Stomach
C.
Bone marrow
D.
Spleen
Ans:
Spleen
Explanation :
Old, "worn out" RBCs are mostly broken down in the spleen. It is the organ that filters the blood, checks it for infection, and removes undesirable substances. RBCs are produced in the red bone marrow of bones. The average life span of erythrocytes is about 120 days.
[17] Self pollination will lead to -
A.
inbreeding
B.
rare breeding
C.
overbreeding
D.
outbreeding
Ans:
inbreeding
Explanation :
Self-pollination can lead to inbreeding depression, or the reduced health of the species, due to the breeding of related specimens. This is why many flowers that could potentially self-pollinate have a built-in mechanism to avoid it.
[18] In any spreadsheet, the address of the first cell is -
A.
OA
B.
TIA
C.
AO
D.
Al
Ans:
Al
Explanation :
There are rows and columns in any spreadsheet. Each column has a capital letter on the top to show what column it is. Each row has a number to the immediate left of the first column, to show what row it is. So address of the cell in the first column, first row is A1.
[19] Which one of the following is correctly matched?
A.
Secondary consumer - Grass
B.
Decomposer - Bacteria
C.
Producer - Deer
D.
Primary consumer - Leopard
Ans:
Decomposer - Bacteria
Explanation :
When plants and animals die, they become food for decomposers like bacteria, fungi and earthworms. The dead things that are eaten by decomposers are called detritus which means "garbage".
[20] When a single gene controls the expression of more than one character, it is said to be -
A.
Heterotrophic
B.
Autotrophic
C.
Allotropic
D.
Pleiotropic
Ans:
Pleiotropic
Explanation :
When a single gene has an effect on the expression of two or more phenotypic traits, it is said to have a pleiotropic effect on the traits. For example, testosterone controls the development of what are referred to as secondary sexual characteristics, but it also relates to behavioral traits like aggression. Thus, a gene that controls the levels of testosterone would have a pleiotropic effect on the expression of many secondary sexual traits which are morphological, as well as behavioral.
[21] The plants which grow well, only in light are known as -
A.
Sciophilous
B.
Xerophytes
C.
Heliophytes
D.
Epiphytes
Ans:
Heliophytes
Explanation :
In botany, heliophytes refer to plants that thrive in bright sunlight; while those growing best in shade are known as sciophytes. Heliophytes are capable of a more efficient use of high light intensities than sciophytes. Examples of heliophytes are sugar cane, sunflower and maize.
[22] Green blocks are referred to -
A.
Green cover
B.
Green Ministry
C.
Bio-bricks
D.
Pro-biotic curd
Ans:
Bio-bricks
Explanation :
Green Blocks are comprised of blocks throughout the neighborhood that pledge to be greener by working together to improve quality of life, clean, and beautify 'their neighborhood. They are also known as bio-bricks.
[23] Which one of the following is an egg laying mammal?
A.
Sloth
B.
Duck - billed platypus
C.
Kangaroo
D.
Bandicoot
Ans:
Duck - billed platypus
Explanation :
The platypus, also known as the duck-billed platypus, is a semi-aquatic egg-laying mammal endemic to eastern Australia. It is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
[24] The type of kidneys present in frog are -
A.
Mesonephros
B.
Metanephros
C.
Archinephros
D.
Pronephros
Ans:
Mesonephros
Explanation :
In the frog, mesonephros is the functional kidney in embryonic as well as adult stage and mesonephric duct functions as both urinary and genital duct. Tubules of the anterior region of kidney get connected to testis to collect spermatozoa, while the posterior region remains as functional kidney and transports urinary wastes to the exterior.
[25] The International Commission on Zoological Nomenclature was established in -
A.
1895
B.
1988
C.
2001
D.
1664
Ans:
1895
Explanation :
The International Commission on Zoological Nomenclature (ICZN) was founded in 1895. It provides and regulates a uniform system of zoological nomenclature ensuring that every animal has a unique and universally accepted scientific name.
Explanation :
Damping off is a horticultural disease or condition, caused by a number of different pathogens that kill or weaken seeds or seedlings before or after they germinate. Pythium, a genus of parasitic oomycete, are most often responsible for damping-off. Along with Rhizoctonia solani, attacks by Pythium are most associated with producing roughly circular patcties of dead seedlings.
[6] Which among the following is the sweetest sugar?
A.
lacrose
B.
fructose
C.
maltos
D.
glucose
Ans:
fructose
Explanation :
There are primarily three types of sugar: glucose, fructose and sucrose. Of the three sugars, fructose is the sweetest and glucose the least sweet, so typically less fructose can be used than table sugar (sucrose) - if sucrose has a sweetness of one, fructose is 1.7 and glucose 0.74. Fructose is known as the fruit sugar as its make source in the diet is fruits and vegetables.
[7] An eazyme produced by HIV that allows the integration of HIV DNA into the host cell's DNA is -
A.
Ligase
B.
Integrase
C.
Helicase
D.
DNA gyrase
Ans:
Integrase
Explanation :
HIV's enzyme for inserting the DNA version of its genome into the host cell DNA is called its "integrase". HIV-1 integrase catalyzes the "cut-and-paste" action of clipping the host DNA and joining the proyiral genome to the clipped ends. It is also produced by viruses containing double-stranded DNAs for the same purpose.
[8] Interferons are synthesized in response to -
A.
Bacteria
B.
Fungi
C.
Mycoplasma
D.
Virus
Ans:
Virus
Explanation :
Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, parasites, or tumor cells. Interferon synthesis occurs primarily in response to viral single-stranded or double stranded RNA that are either the genetic material of RNA viruses or a product of viral transcription. Interferons are named for their ability to "interfere" with viral replication by protecting cells from virus infections.
[9] The resources which are obtained from bio sphere and have life are -
A.
Potential resources
B.
Biotic resources
C.
Abiatic resources
D.
Renewable resources
Ans:
Biotic resources
Explanation :
Biotic resources describe living or once living resources of a community; for example organisms, such as plants and animals. They are obtained from the biosphere and have life. The resources which are composed of non-living things are called Abiotic Resources. For example, water, minerals, metals, wind, solar energy etc.
[10] Which of the following is a fibrous protein?
A.
Haemoglobin
B.
Albumin
C.
Keratin
D.
Enzymes
Ans:
Keratin
Explanation :
Keratin is a family of fibrous structural proteins. It is the key structural material making up the outer layer of human skin. It is also the key structural component of hair and nails. Another example of fibrous protein is collagen.
[11] Typhoid fever is caused by -
A.
Bacteria
B.
Virus
C.
Protozoa
D.
Fwagi
Ans:
Bacteria
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi.
[12] Pleura is the covering of -
A.
Lung
B.
Liver
C.
Kidney
D.
Heart
Ans:
Lung
Explanation :
Pleura is a large, thin sheet of tissue that wraps around the outside of lungs. It is an exceedingly delicate serous membrane that is arranged in the form of a closed invaginated sac. The pleura are only visible when there is an abnormality present.
[13] Which drug is used to cure Glaucoma?
A.
Fexofenadine
B.
Ketoconazole
C.
Latanoprost
D.
Ibuprofen
Ans:
Latanoprost
Explanation :
Latanoprost, sold under the brand name Xalatan, is a medication used to treat increased pressure inside the eye. This includes ocular hypertension and open angle glaucoma.
[14] German Silver is an alloy of -
A.
Copper, Silver and Zinc
B.
Copper, Nickel and Zinc
C.
Mid-brain
D.
Fore-brain
Ans:
Copper, Nickel and Zinc
Explanation :
Nickel silver, also known as German silver, Argentan, new silver, nickel brass, albata, alpacca, or electrum, is a copper alloy with nickel and often zinc. The usual formulation is 60% copper, 20% nickel and 20% zinc. Nickel silver is named for its silvery appearance, but it contains no elemental silver unles s plated. The name “German silver” refers to its development by 19th-century German metalworkers in imitation of the Chinese alloy known as paktong (Cupronickel) All modern, commercially important nickel silvers (such as those standardized under ASTM B122) contain significant amounts of zinc, and are sometimes considered a subset of brass. It is used in zippers, better-quality keys, costume jewellery, for making musical instruments (e.g., cymbals, saxophones), and is preferred for the track in electrically powered model railway layouts, as its oxide is conductive. It is widely used in the production of coins (e.g. Portuguese escudo and the former GDR marks,). Its industrial and technical uses include marine fittings and plumbing fixtures for its corrosion resistance, and heating coils for its high electrical resistance.
[15] The first stable product of photosynthesis is -
A.
Starch
B.
Sucrose
C.
Phosphoglyceric acid
D.
Glucose
Ans:
Phosphoglyceric acid
Explanation :
The first product of photosynthesis is a three carbon compound called phosphoglyceric acid and phosphoglyceraldehyde. Almost immediately, two of these join to form a glucose molecule. Certain herbaceous plants such as sugarcane, corn, and sorghum, form as the first products of photosynthesis not three carbon but four-carbon compounds— oxalacetic, malic, and aspartic acids.
[16] The old and worn-out red blood corpuscles are destroyed in -
A.
Liver
B.
Stomach
C.
Bone marrow
D.
Spleen
Ans:
Spleen
Explanation :
Old, "worn out" RBCs are mostly broken down in the spleen. It is the organ that filters the blood, checks it for infection, and removes undesirable substances. RBCs are produced in the red bone marrow of bones. The average life span of erythrocytes is about 120 days.
[17] Self pollination will lead to -
A.
inbreeding
B.
rare breeding
C.
overbreeding
D.
outbreeding
Ans:
inbreeding
Explanation :
Self-pollination can lead to inbreeding depression, or the reduced health of the species, due to the breeding of related specimens. This is why many flowers that could potentially self-pollinate have a built-in mechanism to avoid it.
[18] In any spreadsheet, the address of the first cell is -
A.
OA
B.
TIA
C.
AO
D.
Al
Ans:
Al
Explanation :
There are rows and columns in any spreadsheet. Each column has a capital letter on the top to show what column it is. Each row has a number to the immediate left of the first column, to show what row it is. So address of the cell in the first column, first row is A1.
[19] Which one of the following is correctly matched?
A.
Secondary consumer - Grass
B.
Decomposer - Bacteria
C.
Producer - Deer
D.
Primary consumer - Leopard
Ans:
Decomposer - Bacteria
Explanation :
When plants and animals die, they become food for decomposers like bacteria, fungi and earthworms. The dead things that are eaten by decomposers are called detritus which means "garbage".
[20] When a single gene controls the expression of more than one character, it is said to be -
A.
Heterotrophic
B.
Autotrophic
C.
Allotropic
D.
Pleiotropic
Ans:
Pleiotropic
Explanation :
When a single gene has an effect on the expression of two or more phenotypic traits, it is said to have a pleiotropic effect on the traits. For example, testosterone controls the development of what are referred to as secondary sexual characteristics, but it also relates to behavioral traits like aggression. Thus, a gene that controls the levels of testosterone would have a pleiotropic effect on the expression of many secondary sexual traits which are morphological, as well as behavioral.
[21] The plants which grow well, only in light are known as -
A.
Sciophilous
B.
Xerophytes
C.
Heliophytes
D.
Epiphytes
Ans:
Heliophytes
Explanation :
In botany, heliophytes refer to plants that thrive in bright sunlight; while those growing best in shade are known as sciophytes. Heliophytes are capable of a more efficient use of high light intensities than sciophytes. Examples of heliophytes are sugar cane, sunflower and maize.
[22] Green blocks are referred to -
A.
Green cover
B.
Green Ministry
C.
Bio-bricks
D.
Pro-biotic curd
Ans:
Bio-bricks
Explanation :
Green Blocks are comprised of blocks throughout the neighborhood that pledge to be greener by working together to improve quality of life, clean, and beautify 'their neighborhood. They are also known as bio-bricks.
[23] Which one of the following is an egg laying mammal?
A.
Sloth
B.
Duck - billed platypus
C.
Kangaroo
D.
Bandicoot
Ans:
Duck - billed platypus
Explanation :
The platypus, also known as the duck-billed platypus, is a semi-aquatic egg-laying mammal endemic to eastern Australia. It is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
[24] The type of kidneys present in frog are -
A.
Mesonephros
B.
Metanephros
C.
Archinephros
D.
Pronephros
Ans:
Mesonephros
Explanation :
In the frog, mesonephros is the functional kidney in embryonic as well as adult stage and mesonephric duct functions as both urinary and genital duct. Tubules of the anterior region of kidney get connected to testis to collect spermatozoa, while the posterior region remains as functional kidney and transports urinary wastes to the exterior.
[25] The International Commission on Zoological Nomenclature was established in -
A.
1895
B.
1988
C.
2001
D.
1664
Ans:
1895
Explanation :
The International Commission on Zoological Nomenclature (ICZN) was founded in 1895. It provides and regulates a uniform system of zoological nomenclature ensuring that every animal has a unique and universally accepted scientific name.
Explanation :
HIV's enzyme for inserting the DNA version of its genome into the host cell DNA is called its "integrase". HIV-1 integrase catalyzes the "cut-and-paste" action of clipping the host DNA and joining the proyiral genome to the clipped ends. It is also produced by viruses containing double-stranded DNAs for the same purpose.
[8] Interferons are synthesized in response to -
A.
Bacteria
B.
Fungi
C.
Mycoplasma
D.
Virus
Ans:
Virus
Explanation :
Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, parasites, or tumor cells. Interferon synthesis occurs primarily in response to viral single-stranded or double stranded RNA that are either the genetic material of RNA viruses or a product of viral transcription. Interferons are named for their ability to "interfere" with viral replication by protecting cells from virus infections.
[9] The resources which are obtained from bio sphere and have life are -
A.
Potential resources
B.
Biotic resources
C.
Abiatic resources
D.
Renewable resources
Ans:
Biotic resources
Explanation :
Biotic resources describe living or once living resources of a community; for example organisms, such as plants and animals. They are obtained from the biosphere and have life. The resources which are composed of non-living things are called Abiotic Resources. For example, water, minerals, metals, wind, solar energy etc.
[10] Which of the following is a fibrous protein?
A.
Haemoglobin
B.
Albumin
C.
Keratin
D.
Enzymes
Ans:
Keratin
Explanation :
Keratin is a family of fibrous structural proteins. It is the key structural material making up the outer layer of human skin. It is also the key structural component of hair and nails. Another example of fibrous protein is collagen.
[11] Typhoid fever is caused by -
A.
Bacteria
B.
Virus
C.
Protozoa
D.
Fwagi
Ans:
Bacteria
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi.
[12] Pleura is the covering of -
A.
Lung
B.
Liver
C.
Kidney
D.
Heart
Ans:
Lung
Explanation :
Pleura is a large, thin sheet of tissue that wraps around the outside of lungs. It is an exceedingly delicate serous membrane that is arranged in the form of a closed invaginated sac. The pleura are only visible when there is an abnormality present.
[13] Which drug is used to cure Glaucoma?
A.
Fexofenadine
B.
Ketoconazole
C.
Latanoprost
D.
Ibuprofen
Ans:
Latanoprost
Explanation :
Latanoprost, sold under the brand name Xalatan, is a medication used to treat increased pressure inside the eye. This includes ocular hypertension and open angle glaucoma.
[14] German Silver is an alloy of -
A.
Copper, Silver and Zinc
B.
Copper, Nickel and Zinc
C.
Mid-brain
D.
Fore-brain
Ans:
Copper, Nickel and Zinc
Explanation :
Nickel silver, also known as German silver, Argentan, new silver, nickel brass, albata, alpacca, or electrum, is a copper alloy with nickel and often zinc. The usual formulation is 60% copper, 20% nickel and 20% zinc. Nickel silver is named for its silvery appearance, but it contains no elemental silver unles s plated. The name “German silver” refers to its development by 19th-century German metalworkers in imitation of the Chinese alloy known as paktong (Cupronickel) All modern, commercially important nickel silvers (such as those standardized under ASTM B122) contain significant amounts of zinc, and are sometimes considered a subset of brass. It is used in zippers, better-quality keys, costume jewellery, for making musical instruments (e.g., cymbals, saxophones), and is preferred for the track in electrically powered model railway layouts, as its oxide is conductive. It is widely used in the production of coins (e.g. Portuguese escudo and the former GDR marks,). Its industrial and technical uses include marine fittings and plumbing fixtures for its corrosion resistance, and heating coils for its high electrical resistance.
[15] The first stable product of photosynthesis is -
A.
Starch
B.
Sucrose
C.
Phosphoglyceric acid
D.
Glucose
Ans:
Phosphoglyceric acid
Explanation :
The first product of photosynthesis is a three carbon compound called phosphoglyceric acid and phosphoglyceraldehyde. Almost immediately, two of these join to form a glucose molecule. Certain herbaceous plants such as sugarcane, corn, and sorghum, form as the first products of photosynthesis not three carbon but four-carbon compounds— oxalacetic, malic, and aspartic acids.
[16] The old and worn-out red blood corpuscles are destroyed in -
A.
Liver
B.
Stomach
C.
Bone marrow
D.
Spleen
Ans:
Spleen
Explanation :
Old, "worn out" RBCs are mostly broken down in the spleen. It is the organ that filters the blood, checks it for infection, and removes undesirable substances. RBCs are produced in the red bone marrow of bones. The average life span of erythrocytes is about 120 days.
[17] Self pollination will lead to -
A.
inbreeding
B.
rare breeding
C.
overbreeding
D.
outbreeding
Ans:
inbreeding
Explanation :
Self-pollination can lead to inbreeding depression, or the reduced health of the species, due to the breeding of related specimens. This is why many flowers that could potentially self-pollinate have a built-in mechanism to avoid it.
[18] In any spreadsheet, the address of the first cell is -
A.
OA
B.
TIA
C.
AO
D.
Al
Ans:
Al
Explanation :
There are rows and columns in any spreadsheet. Each column has a capital letter on the top to show what column it is. Each row has a number to the immediate left of the first column, to show what row it is. So address of the cell in the first column, first row is A1.
[19] Which one of the following is correctly matched?
A.
Secondary consumer - Grass
B.
Decomposer - Bacteria
C.
Producer - Deer
D.
Primary consumer - Leopard
Ans:
Decomposer - Bacteria
Explanation :
When plants and animals die, they become food for decomposers like bacteria, fungi and earthworms. The dead things that are eaten by decomposers are called detritus which means "garbage".
[20] When a single gene controls the expression of more than one character, it is said to be -
A.
Heterotrophic
B.
Autotrophic
C.
Allotropic
D.
Pleiotropic
Ans:
Pleiotropic
Explanation :
When a single gene has an effect on the expression of two or more phenotypic traits, it is said to have a pleiotropic effect on the traits. For example, testosterone controls the development of what are referred to as secondary sexual characteristics, but it also relates to behavioral traits like aggression. Thus, a gene that controls the levels of testosterone would have a pleiotropic effect on the expression of many secondary sexual traits which are morphological, as well as behavioral.
[21] The plants which grow well, only in light are known as -
A.
Sciophilous
B.
Xerophytes
C.
Heliophytes
D.
Epiphytes
Ans:
Heliophytes
Explanation :
In botany, heliophytes refer to plants that thrive in bright sunlight; while those growing best in shade are known as sciophytes. Heliophytes are capable of a more efficient use of high light intensities than sciophytes. Examples of heliophytes are sugar cane, sunflower and maize.
[22] Green blocks are referred to -
A.
Green cover
B.
Green Ministry
C.
Bio-bricks
D.
Pro-biotic curd
Ans:
Bio-bricks
Explanation :
Green Blocks are comprised of blocks throughout the neighborhood that pledge to be greener by working together to improve quality of life, clean, and beautify 'their neighborhood. They are also known as bio-bricks.
[23] Which one of the following is an egg laying mammal?
A.
Sloth
B.
Duck - billed platypus
C.
Kangaroo
D.
Bandicoot
Ans:
Duck - billed platypus
Explanation :
The platypus, also known as the duck-billed platypus, is a semi-aquatic egg-laying mammal endemic to eastern Australia. It is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
[24] The type of kidneys present in frog are -
A.
Mesonephros
B.
Metanephros
C.
Archinephros
D.
Pronephros
Ans:
Mesonephros
Explanation :
In the frog, mesonephros is the functional kidney in embryonic as well as adult stage and mesonephric duct functions as both urinary and genital duct. Tubules of the anterior region of kidney get connected to testis to collect spermatozoa, while the posterior region remains as functional kidney and transports urinary wastes to the exterior.
[25] The International Commission on Zoological Nomenclature was established in -
A.
1895
B.
1988
C.
2001
D.
1664
Ans:
1895
Explanation :
The International Commission on Zoological Nomenclature (ICZN) was founded in 1895. It provides and regulates a uniform system of zoological nomenclature ensuring that every animal has a unique and universally accepted scientific name.
Explanation :
Biotic resources describe living or once living resources of a community; for example organisms, such as plants and animals. They are obtained from the biosphere and have life. The resources which are composed of non-living things are called Abiotic Resources. For example, water, minerals, metals, wind, solar energy etc.
[10] Which of the following is a fibrous protein?
A.
Haemoglobin
B.
Albumin
C.
Keratin
D.
Enzymes
Ans:
Keratin
Explanation :
Keratin is a family of fibrous structural proteins. It is the key structural material making up the outer layer of human skin. It is also the key structural component of hair and nails. Another example of fibrous protein is collagen.
[11] Typhoid fever is caused by -
A.
Bacteria
B.
Virus
C.
Protozoa
D.
Fwagi
Ans:
Bacteria
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi.
[12] Pleura is the covering of -
A.
Lung
B.
Liver
C.
Kidney
D.
Heart
Ans:
Lung
Explanation :
Pleura is a large, thin sheet of tissue that wraps around the outside of lungs. It is an exceedingly delicate serous membrane that is arranged in the form of a closed invaginated sac. The pleura are only visible when there is an abnormality present.
[13] Which drug is used to cure Glaucoma?
A.
Fexofenadine
B.
Ketoconazole
C.
Latanoprost
D.
Ibuprofen
Ans:
Latanoprost
Explanation :
Latanoprost, sold under the brand name Xalatan, is a medication used to treat increased pressure inside the eye. This includes ocular hypertension and open angle glaucoma.
[14] German Silver is an alloy of -
A.
Copper, Silver and Zinc
B.
Copper, Nickel and Zinc
C.
Mid-brain
D.
Fore-brain
Ans:
Copper, Nickel and Zinc
Explanation :
Nickel silver, also known as German silver, Argentan, new silver, nickel brass, albata, alpacca, or electrum, is a copper alloy with nickel and often zinc. The usual formulation is 60% copper, 20% nickel and 20% zinc. Nickel silver is named for its silvery appearance, but it contains no elemental silver unles s plated. The name “German silver” refers to its development by 19th-century German metalworkers in imitation of the Chinese alloy known as paktong (Cupronickel) All modern, commercially important nickel silvers (such as those standardized under ASTM B122) contain significant amounts of zinc, and are sometimes considered a subset of brass. It is used in zippers, better-quality keys, costume jewellery, for making musical instruments (e.g., cymbals, saxophones), and is preferred for the track in electrically powered model railway layouts, as its oxide is conductive. It is widely used in the production of coins (e.g. Portuguese escudo and the former GDR marks,). Its industrial and technical uses include marine fittings and plumbing fixtures for its corrosion resistance, and heating coils for its high electrical resistance.
[15] The first stable product of photosynthesis is -
A.
Starch
B.
Sucrose
C.
Phosphoglyceric acid
D.
Glucose
Ans:
Phosphoglyceric acid
Explanation :
The first product of photosynthesis is a three carbon compound called phosphoglyceric acid and phosphoglyceraldehyde. Almost immediately, two of these join to form a glucose molecule. Certain herbaceous plants such as sugarcane, corn, and sorghum, form as the first products of photosynthesis not three carbon but four-carbon compounds— oxalacetic, malic, and aspartic acids.
[16] The old and worn-out red blood corpuscles are destroyed in -
A.
Liver
B.
Stomach
C.
Bone marrow
D.
Spleen
Ans:
Spleen
Explanation :
Old, "worn out" RBCs are mostly broken down in the spleen. It is the organ that filters the blood, checks it for infection, and removes undesirable substances. RBCs are produced in the red bone marrow of bones. The average life span of erythrocytes is about 120 days.
[17] Self pollination will lead to -
A.
inbreeding
B.
rare breeding
C.
overbreeding
D.
outbreeding
Ans:
inbreeding
Explanation :
Self-pollination can lead to inbreeding depression, or the reduced health of the species, due to the breeding of related specimens. This is why many flowers that could potentially self-pollinate have a built-in mechanism to avoid it.
[18] In any spreadsheet, the address of the first cell is -
A.
OA
B.
TIA
C.
AO
D.
Al
Ans:
Al
Explanation :
There are rows and columns in any spreadsheet. Each column has a capital letter on the top to show what column it is. Each row has a number to the immediate left of the first column, to show what row it is. So address of the cell in the first column, first row is A1.
[19] Which one of the following is correctly matched?
A.
Secondary consumer - Grass
B.
Decomposer - Bacteria
C.
Producer - Deer
D.
Primary consumer - Leopard
Ans:
Decomposer - Bacteria
Explanation :
When plants and animals die, they become food for decomposers like bacteria, fungi and earthworms. The dead things that are eaten by decomposers are called detritus which means "garbage".
[20] When a single gene controls the expression of more than one character, it is said to be -
A.
Heterotrophic
B.
Autotrophic
C.
Allotropic
D.
Pleiotropic
Ans:
Pleiotropic
Explanation :
When a single gene has an effect on the expression of two or more phenotypic traits, it is said to have a pleiotropic effect on the traits. For example, testosterone controls the development of what are referred to as secondary sexual characteristics, but it also relates to behavioral traits like aggression. Thus, a gene that controls the levels of testosterone would have a pleiotropic effect on the expression of many secondary sexual traits which are morphological, as well as behavioral.
[21] The plants which grow well, only in light are known as -
A.
Sciophilous
B.
Xerophytes
C.
Heliophytes
D.
Epiphytes
Ans:
Heliophytes
Explanation :
In botany, heliophytes refer to plants that thrive in bright sunlight; while those growing best in shade are known as sciophytes. Heliophytes are capable of a more efficient use of high light intensities than sciophytes. Examples of heliophytes are sugar cane, sunflower and maize.
[22] Green blocks are referred to -
A.
Green cover
B.
Green Ministry
C.
Bio-bricks
D.
Pro-biotic curd
Ans:
Bio-bricks
Explanation :
Green Blocks are comprised of blocks throughout the neighborhood that pledge to be greener by working together to improve quality of life, clean, and beautify 'their neighborhood. They are also known as bio-bricks.
[23] Which one of the following is an egg laying mammal?
A.
Sloth
B.
Duck - billed platypus
C.
Kangaroo
D.
Bandicoot
Ans:
Duck - billed platypus
Explanation :
The platypus, also known as the duck-billed platypus, is a semi-aquatic egg-laying mammal endemic to eastern Australia. It is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
[24] The type of kidneys present in frog are -
A.
Mesonephros
B.
Metanephros
C.
Archinephros
D.
Pronephros
Ans:
Mesonephros
Explanation :
In the frog, mesonephros is the functional kidney in embryonic as well as adult stage and mesonephric duct functions as both urinary and genital duct. Tubules of the anterior region of kidney get connected to testis to collect spermatozoa, while the posterior region remains as functional kidney and transports urinary wastes to the exterior.
[25] The International Commission on Zoological Nomenclature was established in -
A.
1895
B.
1988
C.
2001
D.
1664
Ans:
1895
Explanation :
The International Commission on Zoological Nomenclature (ICZN) was founded in 1895. It provides and regulates a uniform system of zoological nomenclature ensuring that every animal has a unique and universally accepted scientific name.
Explanation :
Typhoid fever, also known as typhoid, is a common worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi.
[12] Pleura is the covering of -
A.
Lung
B.
Liver
C.
Kidney
D.
Heart
Ans:
Lung
Explanation :
Pleura is a large, thin sheet of tissue that wraps around the outside of lungs. It is an exceedingly delicate serous membrane that is arranged in the form of a closed invaginated sac. The pleura are only visible when there is an abnormality present.
[13] Which drug is used to cure Glaucoma?
A.
Fexofenadine
B.
Ketoconazole
C.
Latanoprost
D.
Ibuprofen
Ans:
Latanoprost
Explanation :
Latanoprost, sold under the brand name Xalatan, is a medication used to treat increased pressure inside the eye. This includes ocular hypertension and open angle glaucoma.
[14] German Silver is an alloy of -
A.
Copper, Silver and Zinc
B.
Copper, Nickel and Zinc
C.
Mid-brain
D.
Fore-brain
Ans:
Copper, Nickel and Zinc
Explanation :
Nickel silver, also known as German silver, Argentan, new silver, nickel brass, albata, alpacca, or electrum, is a copper alloy with nickel and often zinc. The usual formulation is 60% copper, 20% nickel and 20% zinc. Nickel silver is named for its silvery appearance, but it contains no elemental silver unles s plated. The name “German silver” refers to its development by 19th-century German metalworkers in imitation of the Chinese alloy known as paktong (Cupronickel) All modern, commercially important nickel silvers (such as those standardized under ASTM B122) contain significant amounts of zinc, and are sometimes considered a subset of brass. It is used in zippers, better-quality keys, costume jewellery, for making musical instruments (e.g., cymbals, saxophones), and is preferred for the track in electrically powered model railway layouts, as its oxide is conductive. It is widely used in the production of coins (e.g. Portuguese escudo and the former GDR marks,). Its industrial and technical uses include marine fittings and plumbing fixtures for its corrosion resistance, and heating coils for its high electrical resistance.
[15] The first stable product of photosynthesis is -
A.
Starch
B.
Sucrose
C.
Phosphoglyceric acid
D.
Glucose
Ans:
Phosphoglyceric acid
Explanation :
The first product of photosynthesis is a three carbon compound called phosphoglyceric acid and phosphoglyceraldehyde. Almost immediately, two of these join to form a glucose molecule. Certain herbaceous plants such as sugarcane, corn, and sorghum, form as the first products of photosynthesis not three carbon but four-carbon compounds— oxalacetic, malic, and aspartic acids.
[16] The old and worn-out red blood corpuscles are destroyed in -
A.
Liver
B.
Stomach
C.
Bone marrow
D.
Spleen
Ans:
Spleen
Explanation :
Old, "worn out" RBCs are mostly broken down in the spleen. It is the organ that filters the blood, checks it for infection, and removes undesirable substances. RBCs are produced in the red bone marrow of bones. The average life span of erythrocytes is about 120 days.
[17] Self pollination will lead to -
A.
inbreeding
B.
rare breeding
C.
overbreeding
D.
outbreeding
Ans:
inbreeding
Explanation :
Self-pollination can lead to inbreeding depression, or the reduced health of the species, due to the breeding of related specimens. This is why many flowers that could potentially self-pollinate have a built-in mechanism to avoid it.
[18] In any spreadsheet, the address of the first cell is -
A.
OA
B.
TIA
C.
AO
D.
Al
Ans:
Al
Explanation :
There are rows and columns in any spreadsheet. Each column has a capital letter on the top to show what column it is. Each row has a number to the immediate left of the first column, to show what row it is. So address of the cell in the first column, first row is A1.
[19] Which one of the following is correctly matched?
A.
Secondary consumer - Grass
B.
Decomposer - Bacteria
C.
Producer - Deer
D.
Primary consumer - Leopard
Ans:
Decomposer - Bacteria
Explanation :
When plants and animals die, they become food for decomposers like bacteria, fungi and earthworms. The dead things that are eaten by decomposers are called detritus which means "garbage".
[20] When a single gene controls the expression of more than one character, it is said to be -
A.
Heterotrophic
B.
Autotrophic
C.
Allotropic
D.
Pleiotropic
Ans:
Pleiotropic
Explanation :
When a single gene has an effect on the expression of two or more phenotypic traits, it is said to have a pleiotropic effect on the traits. For example, testosterone controls the development of what are referred to as secondary sexual characteristics, but it also relates to behavioral traits like aggression. Thus, a gene that controls the levels of testosterone would have a pleiotropic effect on the expression of many secondary sexual traits which are morphological, as well as behavioral.
[21] The plants which grow well, only in light are known as -
A.
Sciophilous
B.
Xerophytes
C.
Heliophytes
D.
Epiphytes
Ans:
Heliophytes
Explanation :
In botany, heliophytes refer to plants that thrive in bright sunlight; while those growing best in shade are known as sciophytes. Heliophytes are capable of a more efficient use of high light intensities than sciophytes. Examples of heliophytes are sugar cane, sunflower and maize.
[22] Green blocks are referred to -
A.
Green cover
B.
Green Ministry
C.
Bio-bricks
D.
Pro-biotic curd
Ans:
Bio-bricks
Explanation :
Green Blocks are comprised of blocks throughout the neighborhood that pledge to be greener by working together to improve quality of life, clean, and beautify 'their neighborhood. They are also known as bio-bricks.
[23] Which one of the following is an egg laying mammal?
A.
Sloth
B.
Duck - billed platypus
C.
Kangaroo
D.
Bandicoot
Ans:
Duck - billed platypus
Explanation :
The platypus, also known as the duck-billed platypus, is a semi-aquatic egg-laying mammal endemic to eastern Australia. It is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
[24] The type of kidneys present in frog are -
A.
Mesonephros
B.
Metanephros
C.
Archinephros
D.
Pronephros
Ans:
Mesonephros
Explanation :
In the frog, mesonephros is the functional kidney in embryonic as well as adult stage and mesonephric duct functions as both urinary and genital duct. Tubules of the anterior region of kidney get connected to testis to collect spermatozoa, while the posterior region remains as functional kidney and transports urinary wastes to the exterior.
[25] The International Commission on Zoological Nomenclature was established in -
A.
1895
B.
1988
C.
2001
D.
1664
Ans:
1895
Explanation :
The International Commission on Zoological Nomenclature (ICZN) was founded in 1895. It provides and regulates a uniform system of zoological nomenclature ensuring that every animal has a unique and universally accepted scientific name.
Explanation :
Latanoprost, sold under the brand name Xalatan, is a medication used to treat increased pressure inside the eye. This includes ocular hypertension and open angle glaucoma.
[14] German Silver is an alloy of -
A.
Copper, Silver and Zinc
B.
Copper, Nickel and Zinc
C.
Mid-brain
D.
Fore-brain
Ans:
Copper, Nickel and Zinc
Explanation :
Nickel silver, also known as German silver, Argentan, new silver, nickel brass, albata, alpacca, or electrum, is a copper alloy with nickel and often zinc. The usual formulation is 60% copper, 20% nickel and 20% zinc. Nickel silver is named for its silvery appearance, but it contains no elemental silver unles s plated. The name “German silver” refers to its development by 19th-century German metalworkers in imitation of the Chinese alloy known as paktong (Cupronickel) All modern, commercially important nickel silvers (such as those standardized under ASTM B122) contain significant amounts of zinc, and are sometimes considered a subset of brass. It is used in zippers, better-quality keys, costume jewellery, for making musical instruments (e.g., cymbals, saxophones), and is preferred for the track in electrically powered model railway layouts, as its oxide is conductive. It is widely used in the production of coins (e.g. Portuguese escudo and the former GDR marks,). Its industrial and technical uses include marine fittings and plumbing fixtures for its corrosion resistance, and heating coils for its high electrical resistance.
[15] The first stable product of photosynthesis is -
A.
Starch
B.
Sucrose
C.
Phosphoglyceric acid
D.
Glucose
Ans:
Phosphoglyceric acid
Explanation :
The first product of photosynthesis is a three carbon compound called phosphoglyceric acid and phosphoglyceraldehyde. Almost immediately, two of these join to form a glucose molecule. Certain herbaceous plants such as sugarcane, corn, and sorghum, form as the first products of photosynthesis not three carbon but four-carbon compounds— oxalacetic, malic, and aspartic acids.
[16] The old and worn-out red blood corpuscles are destroyed in -
A.
Liver
B.
Stomach
C.
Bone marrow
D.
Spleen
Ans:
Spleen
Explanation :
Old, "worn out" RBCs are mostly broken down in the spleen. It is the organ that filters the blood, checks it for infection, and removes undesirable substances. RBCs are produced in the red bone marrow of bones. The average life span of erythrocytes is about 120 days.
[17] Self pollination will lead to -
A.
inbreeding
B.
rare breeding
C.
overbreeding
D.
outbreeding
Ans:
inbreeding
Explanation :
Self-pollination can lead to inbreeding depression, or the reduced health of the species, due to the breeding of related specimens. This is why many flowers that could potentially self-pollinate have a built-in mechanism to avoid it.
[18] In any spreadsheet, the address of the first cell is -
A.
OA
B.
TIA
C.
AO
D.
Al
Ans:
Al
Explanation :
There are rows and columns in any spreadsheet. Each column has a capital letter on the top to show what column it is. Each row has a number to the immediate left of the first column, to show what row it is. So address of the cell in the first column, first row is A1.
[19] Which one of the following is correctly matched?
A.
Secondary consumer - Grass
B.
Decomposer - Bacteria
C.
Producer - Deer
D.
Primary consumer - Leopard
Ans:
Decomposer - Bacteria
Explanation :
When plants and animals die, they become food for decomposers like bacteria, fungi and earthworms. The dead things that are eaten by decomposers are called detritus which means "garbage".
[20] When a single gene controls the expression of more than one character, it is said to be -
A.
Heterotrophic
B.
Autotrophic
C.
Allotropic
D.
Pleiotropic
Ans:
Pleiotropic
Explanation :
When a single gene has an effect on the expression of two or more phenotypic traits, it is said to have a pleiotropic effect on the traits. For example, testosterone controls the development of what are referred to as secondary sexual characteristics, but it also relates to behavioral traits like aggression. Thus, a gene that controls the levels of testosterone would have a pleiotropic effect on the expression of many secondary sexual traits which are morphological, as well as behavioral.
[21] The plants which grow well, only in light are known as -
A.
Sciophilous
B.
Xerophytes
C.
Heliophytes
D.
Epiphytes
Ans:
Heliophytes
Explanation :
In botany, heliophytes refer to plants that thrive in bright sunlight; while those growing best in shade are known as sciophytes. Heliophytes are capable of a more efficient use of high light intensities than sciophytes. Examples of heliophytes are sugar cane, sunflower and maize.
[22] Green blocks are referred to -
A.
Green cover
B.
Green Ministry
C.
Bio-bricks
D.
Pro-biotic curd
Ans:
Bio-bricks
Explanation :
Green Blocks are comprised of blocks throughout the neighborhood that pledge to be greener by working together to improve quality of life, clean, and beautify 'their neighborhood. They are also known as bio-bricks.
[23] Which one of the following is an egg laying mammal?
A.
Sloth
B.
Duck - billed platypus
C.
Kangaroo
D.
Bandicoot
Ans:
Duck - billed platypus
Explanation :
The platypus, also known as the duck-billed platypus, is a semi-aquatic egg-laying mammal endemic to eastern Australia. It is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
[24] The type of kidneys present in frog are -
A.
Mesonephros
B.
Metanephros
C.
Archinephros
D.
Pronephros
Ans:
Mesonephros
Explanation :
In the frog, mesonephros is the functional kidney in embryonic as well as adult stage and mesonephric duct functions as both urinary and genital duct. Tubules of the anterior region of kidney get connected to testis to collect spermatozoa, while the posterior region remains as functional kidney and transports urinary wastes to the exterior.
[25] The International Commission on Zoological Nomenclature was established in -
A.
1895
B.
1988
C.
2001
D.
1664
Ans:
1895
Explanation :
The International Commission on Zoological Nomenclature (ICZN) was founded in 1895. It provides and regulates a uniform system of zoological nomenclature ensuring that every animal has a unique and universally accepted scientific name.
Explanation :
The first product of photosynthesis is a three carbon compound called phosphoglyceric acid and phosphoglyceraldehyde. Almost immediately, two of these join to form a glucose molecule. Certain herbaceous plants such as sugarcane, corn, and sorghum, form as the first products of photosynthesis not three carbon but four-carbon compounds— oxalacetic, malic, and aspartic acids.
[16] The old and worn-out red blood corpuscles are destroyed in -
A.
Liver
B.
Stomach
C.
Bone marrow
D.
Spleen
Ans:
Spleen
Explanation :
Old, "worn out" RBCs are mostly broken down in the spleen. It is the organ that filters the blood, checks it for infection, and removes undesirable substances. RBCs are produced in the red bone marrow of bones. The average life span of erythrocytes is about 120 days.
[17] Self pollination will lead to -
A.
inbreeding
B.
rare breeding
C.
overbreeding
D.
outbreeding
Ans:
inbreeding
Explanation :
Self-pollination can lead to inbreeding depression, or the reduced health of the species, due to the breeding of related specimens. This is why many flowers that could potentially self-pollinate have a built-in mechanism to avoid it.
[18] In any spreadsheet, the address of the first cell is -
A.
OA
B.
TIA
C.
AO
D.
Al
Ans:
Al
Explanation :
There are rows and columns in any spreadsheet. Each column has a capital letter on the top to show what column it is. Each row has a number to the immediate left of the first column, to show what row it is. So address of the cell in the first column, first row is A1.
[19] Which one of the following is correctly matched?
A.
Secondary consumer - Grass
B.
Decomposer - Bacteria
C.
Producer - Deer
D.
Primary consumer - Leopard
Ans:
Decomposer - Bacteria
Explanation :
When plants and animals die, they become food for decomposers like bacteria, fungi and earthworms. The dead things that are eaten by decomposers are called detritus which means "garbage".
[20] When a single gene controls the expression of more than one character, it is said to be -
A.
Heterotrophic
B.
Autotrophic
C.
Allotropic
D.
Pleiotropic
Ans:
Pleiotropic
Explanation :
When a single gene has an effect on the expression of two or more phenotypic traits, it is said to have a pleiotropic effect on the traits. For example, testosterone controls the development of what are referred to as secondary sexual characteristics, but it also relates to behavioral traits like aggression. Thus, a gene that controls the levels of testosterone would have a pleiotropic effect on the expression of many secondary sexual traits which are morphological, as well as behavioral.
[21] The plants which grow well, only in light are known as -
A.
Sciophilous
B.
Xerophytes
C.
Heliophytes
D.
Epiphytes
Ans:
Heliophytes
Explanation :
In botany, heliophytes refer to plants that thrive in bright sunlight; while those growing best in shade are known as sciophytes. Heliophytes are capable of a more efficient use of high light intensities than sciophytes. Examples of heliophytes are sugar cane, sunflower and maize.
[22] Green blocks are referred to -
A.
Green cover
B.
Green Ministry
C.
Bio-bricks
D.
Pro-biotic curd
Ans:
Bio-bricks
Explanation :
Green Blocks are comprised of blocks throughout the neighborhood that pledge to be greener by working together to improve quality of life, clean, and beautify 'their neighborhood. They are also known as bio-bricks.
[23] Which one of the following is an egg laying mammal?
A.
Sloth
B.
Duck - billed platypus
C.
Kangaroo
D.
Bandicoot
Ans:
Duck - billed platypus
Explanation :
The platypus, also known as the duck-billed platypus, is a semi-aquatic egg-laying mammal endemic to eastern Australia. It is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
[24] The type of kidneys present in frog are -
A.
Mesonephros
B.
Metanephros
C.
Archinephros
D.
Pronephros
Ans:
Mesonephros
Explanation :
In the frog, mesonephros is the functional kidney in embryonic as well as adult stage and mesonephric duct functions as both urinary and genital duct. Tubules of the anterior region of kidney get connected to testis to collect spermatozoa, while the posterior region remains as functional kidney and transports urinary wastes to the exterior.
[25] The International Commission on Zoological Nomenclature was established in -
A.
1895
B.
1988
C.
2001
D.
1664
Ans:
1895
Explanation :
The International Commission on Zoological Nomenclature (ICZN) was founded in 1895. It provides and regulates a uniform system of zoological nomenclature ensuring that every animal has a unique and universally accepted scientific name.
Explanation :
Self-pollination can lead to inbreeding depression, or the reduced health of the species, due to the breeding of related specimens. This is why many flowers that could potentially self-pollinate have a built-in mechanism to avoid it.
[18] In any spreadsheet, the address of the first cell is -
A.
OA
B.
TIA
C.
AO
D.
Al
Ans:
Al
Explanation :
There are rows and columns in any spreadsheet. Each column has a capital letter on the top to show what column it is. Each row has a number to the immediate left of the first column, to show what row it is. So address of the cell in the first column, first row is A1.
[19] Which one of the following is correctly matched?
A.
Secondary consumer - Grass
B.
Decomposer - Bacteria
C.
Producer - Deer
D.
Primary consumer - Leopard
Ans:
Decomposer - Bacteria
Explanation :
When plants and animals die, they become food for decomposers like bacteria, fungi and earthworms. The dead things that are eaten by decomposers are called detritus which means "garbage".
[20] When a single gene controls the expression of more than one character, it is said to be -
A.
Heterotrophic
B.
Autotrophic
C.
Allotropic
D.
Pleiotropic
Ans:
Pleiotropic
Explanation :
When a single gene has an effect on the expression of two or more phenotypic traits, it is said to have a pleiotropic effect on the traits. For example, testosterone controls the development of what are referred to as secondary sexual characteristics, but it also relates to behavioral traits like aggression. Thus, a gene that controls the levels of testosterone would have a pleiotropic effect on the expression of many secondary sexual traits which are morphological, as well as behavioral.
[21] The plants which grow well, only in light are known as -
A.
Sciophilous
B.
Xerophytes
C.
Heliophytes
D.
Epiphytes
Ans:
Heliophytes
Explanation :
In botany, heliophytes refer to plants that thrive in bright sunlight; while those growing best in shade are known as sciophytes. Heliophytes are capable of a more efficient use of high light intensities than sciophytes. Examples of heliophytes are sugar cane, sunflower and maize.
[22] Green blocks are referred to -
A.
Green cover
B.
Green Ministry
C.
Bio-bricks
D.
Pro-biotic curd
Ans:
Bio-bricks
Explanation :
Green Blocks are comprised of blocks throughout the neighborhood that pledge to be greener by working together to improve quality of life, clean, and beautify 'their neighborhood. They are also known as bio-bricks.
[23] Which one of the following is an egg laying mammal?
A.
Sloth
B.
Duck - billed platypus
C.
Kangaroo
D.
Bandicoot
Ans:
Duck - billed platypus
Explanation :
The platypus, also known as the duck-billed platypus, is a semi-aquatic egg-laying mammal endemic to eastern Australia. It is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
[24] The type of kidneys present in frog are -
A.
Mesonephros
B.
Metanephros
C.
Archinephros
D.
Pronephros
Ans:
Mesonephros
Explanation :
In the frog, mesonephros is the functional kidney in embryonic as well as adult stage and mesonephric duct functions as both urinary and genital duct. Tubules of the anterior region of kidney get connected to testis to collect spermatozoa, while the posterior region remains as functional kidney and transports urinary wastes to the exterior.
[25] The International Commission on Zoological Nomenclature was established in -
A.
1895
B.
1988
C.
2001
D.
1664
Ans:
1895
Explanation :
The International Commission on Zoological Nomenclature (ICZN) was founded in 1895. It provides and regulates a uniform system of zoological nomenclature ensuring that every animal has a unique and universally accepted scientific name.
Explanation :
When plants and animals die, they become food for decomposers like bacteria, fungi and earthworms. The dead things that are eaten by decomposers are called detritus which means "garbage".
[20] When a single gene controls the expression of more than one character, it is said to be -
A.
Heterotrophic
B.
Autotrophic
C.
Allotropic
D.
Pleiotropic
Ans:
Pleiotropic
Explanation :
When a single gene has an effect on the expression of two or more phenotypic traits, it is said to have a pleiotropic effect on the traits. For example, testosterone controls the development of what are referred to as secondary sexual characteristics, but it also relates to behavioral traits like aggression. Thus, a gene that controls the levels of testosterone would have a pleiotropic effect on the expression of many secondary sexual traits which are morphological, as well as behavioral.
[21] The plants which grow well, only in light are known as -
A.
Sciophilous
B.
Xerophytes
C.
Heliophytes
D.
Epiphytes
Ans:
Heliophytes
Explanation :
In botany, heliophytes refer to plants that thrive in bright sunlight; while those growing best in shade are known as sciophytes. Heliophytes are capable of a more efficient use of high light intensities than sciophytes. Examples of heliophytes are sugar cane, sunflower and maize.
[22] Green blocks are referred to -
A.
Green cover
B.
Green Ministry
C.
Bio-bricks
D.
Pro-biotic curd
Ans:
Bio-bricks
Explanation :
Green Blocks are comprised of blocks throughout the neighborhood that pledge to be greener by working together to improve quality of life, clean, and beautify 'their neighborhood. They are also known as bio-bricks.
[23] Which one of the following is an egg laying mammal?
A.
Sloth
B.
Duck - billed platypus
C.
Kangaroo
D.
Bandicoot
Ans:
Duck - billed platypus
Explanation :
The platypus, also known as the duck-billed platypus, is a semi-aquatic egg-laying mammal endemic to eastern Australia. It is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
[24] The type of kidneys present in frog are -
A.
Mesonephros
B.
Metanephros
C.
Archinephros
D.
Pronephros
Ans:
Mesonephros
Explanation :
In the frog, mesonephros is the functional kidney in embryonic as well as adult stage and mesonephric duct functions as both urinary and genital duct. Tubules of the anterior region of kidney get connected to testis to collect spermatozoa, while the posterior region remains as functional kidney and transports urinary wastes to the exterior.
[25] The International Commission on Zoological Nomenclature was established in -
A.
1895
B.
1988
C.
2001
D.
1664
Ans:
1895
Explanation :
The International Commission on Zoological Nomenclature (ICZN) was founded in 1895. It provides and regulates a uniform system of zoological nomenclature ensuring that every animal has a unique and universally accepted scientific name.
Explanation :
In botany, heliophytes refer to plants that thrive in bright sunlight; while those growing best in shade are known as sciophytes. Heliophytes are capable of a more efficient use of high light intensities than sciophytes. Examples of heliophytes are sugar cane, sunflower and maize.
[22] Green blocks are referred to -
A.
Green cover
B.
Green Ministry
C.
Bio-bricks
D.
Pro-biotic curd
Ans:
Bio-bricks
Explanation :
Green Blocks are comprised of blocks throughout the neighborhood that pledge to be greener by working together to improve quality of life, clean, and beautify 'their neighborhood. They are also known as bio-bricks.
[23] Which one of the following is an egg laying mammal?
A.
Sloth
B.
Duck - billed platypus
C.
Kangaroo
D.
Bandicoot
Ans:
Duck - billed platypus
Explanation :
The platypus, also known as the duck-billed platypus, is a semi-aquatic egg-laying mammal endemic to eastern Australia. It is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
[24] The type of kidneys present in frog are -
A.
Mesonephros
B.
Metanephros
C.
Archinephros
D.
Pronephros
Ans:
Mesonephros
Explanation :
In the frog, mesonephros is the functional kidney in embryonic as well as adult stage and mesonephric duct functions as both urinary and genital duct. Tubules of the anterior region of kidney get connected to testis to collect spermatozoa, while the posterior region remains as functional kidney and transports urinary wastes to the exterior.
[25] The International Commission on Zoological Nomenclature was established in -
A.
1895
B.
1988
C.
2001
D.
1664
Ans:
1895
Explanation :
The International Commission on Zoological Nomenclature (ICZN) was founded in 1895. It provides and regulates a uniform system of zoological nomenclature ensuring that every animal has a unique and universally accepted scientific name.
Explanation :
The platypus, also known as the duck-billed platypus, is a semi-aquatic egg-laying mammal endemic to eastern Australia. It is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.
[24] The type of kidneys present in frog are -
A.
Mesonephros
B.
Metanephros
C.
Archinephros
D.
Pronephros
Ans:
Mesonephros
Explanation :
In the frog, mesonephros is the functional kidney in embryonic as well as adult stage and mesonephric duct functions as both urinary and genital duct. Tubules of the anterior region of kidney get connected to testis to collect spermatozoa, while the posterior region remains as functional kidney and transports urinary wastes to the exterior.
[25] The International Commission on Zoological Nomenclature was established in -
A.
1895
B.
1988
C.
2001
D.
1664
Ans:
1895
Explanation :
The International Commission on Zoological Nomenclature (ICZN) was founded in 1895. It provides and regulates a uniform system of zoological nomenclature ensuring that every animal has a unique and universally accepted scientific name.
Explanation :
The International Commission on Zoological Nomenclature (ICZN) was founded in 1895. It provides and regulates a uniform system of zoological nomenclature ensuring that every animal has a unique and universally accepted scientific name.