Q. Which pigment is primarily responsible for the green color of plants?
A.
Carotenoids
B.
Chlorophyll
C.
Xanthophyll
D.
Anthocyanins
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Solution
Chlorophyll is the pigment that gives plants their green color and is essential for photosynthesis, allowing plants to absorb light energy.
Correct Answer: B — Chlorophyll
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Q. Which planet has the highest gravitational acceleration? (2020)
A.
Earth
B.
Jupiter
C.
Mars
D.
Venus
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Solution
Jupiter has the highest gravitational acceleration among the planets in our solar system, approximately 24.79 m/s².
Correct Answer: B — Jupiter
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Q. Which plant group is known for having a life cycle that alternates between haploid and diploid generations? (2023)
A.
Angiosperms
B.
Gymnosperms
C.
Pteridophytes
D.
All of the above
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Solution
All of these plant groups exhibit alternation of generations, where both haploid (gametophyte) and diploid (sporophyte) stages are present.
Correct Answer: D — All of the above
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Q. Which plant group is known for producing spores? (2023)
A.
Angiosperms
B.
Gymnosperms
C.
Pteridophytes
D.
Bryophytes
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Solution
Pteridophytes reproduce through spores, which are produced in sporangia.
Correct Answer: C — Pteridophytes
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Q. Which plant hormone is known for its role in apical dominance? (2023)
A.
Ethylene
B.
Auxins
C.
Cytokinins
D.
Gibberellins
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Solution
Auxins are responsible for maintaining apical dominance by inhibiting the growth of lateral buds.
Correct Answer: B — Auxins
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Q. Which plant hormone is known for its role in fruit ripening? (2023)
A.
Auxins
B.
Cytokinins
C.
Ethylene
D.
Gibberellins
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Solution
Ethylene is the hormone responsible for the ripening of fruits and is produced in response to various stimuli.
Correct Answer: C — Ethylene
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Q. Which plant hormone is known for its role in stress responses? (2023)
A.
Gibberellins
B.
Auxins
C.
Abscisic acid
D.
Cytokinins
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Solution
Abscisic acid is known for its role in stress responses, particularly in drought conditions.
Correct Answer: C — Abscisic acid
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Q. Which plant hormone is known to delay senescence in leaves? (2022)
A.
Gibberellins
B.
Cytokinins
C.
Ethylene
D.
Abscisic acid
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Solution
Cytokinins are known to delay senescence and promote cell division in plants.
Correct Answer: B — Cytokinins
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Q. Which plant hormone is known to induce abscission of leaves and fruits? (2022)
A.
Auxins
B.
Ethylene
C.
Gibberellins
D.
Cytokinins
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Solution
Ethylene is known to promote the abscission of leaves and fruits in plants.
Correct Answer: B — Ethylene
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Q. Which plant hormone is known to promote fruit ripening? (2022)
A.
Auxins
B.
Cytokinins
C.
Ethylene
D.
Gibberellins
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Solution
Ethylene is the hormone that promotes fruit ripening and is also involved in the senescence of leaves.
Correct Answer: C — Ethylene
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Q. Which plant hormone is primarily associated with apical dominance? (2023)
A.
Auxins
B.
Cytokinins
C.
Gibberellins
D.
Ethylene
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Solution
Auxins are responsible for apical dominance, suppressing the growth of lateral buds.
Correct Answer: A — Auxins
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Q. Which plant hormone is primarily involved in apical dominance? (2023)
A.
Auxins
B.
Cytokinins
C.
Gibberellins
D.
Ethylene
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Solution
Auxins are primarily responsible for apical dominance, suppressing the growth of lateral buds.
Correct Answer: A — Auxins
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Q. Which plant hormone is primarily involved in seed germination? (2022)
A.
Ethylene
B.
Gibberellins
C.
Auxins
D.
Abscisic acid
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Solution
Gibberellins are crucial for breaking seed dormancy and promoting germination by stimulating enzyme production.
Correct Answer: B — Gibberellins
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Q. Which plant hormone is primarily involved in the elongation of stems? (2023)
A.
Ethylene
B.
Gibberellins
C.
Cytokinins
D.
Abscisic acid
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Solution
Gibberellins are primarily responsible for stem elongation by promoting cell division and elongation.
Correct Answer: B — Gibberellins
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Q. Which plant hormone is primarily involved in the response to light? (2022)
A.
Auxins
B.
Ethylene
C.
Gibberellins
D.
Abscisic acid
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Solution
Auxins are primarily involved in the plant's response to light, promoting growth towards the light source.
Correct Answer: A — Auxins
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Q. Which plant hormone is primarily involved in the response to stress conditions? (2023)
A.
Auxins
B.
Gibberellins
C.
Abscisic acid
D.
Cytokinins
Show solution
Solution
Abscisic acid is primarily involved in the plant's response to stress conditions, particularly drought.
Correct Answer: C — Abscisic acid
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Q. Which plant hormone is primarily responsible for apical dominance? (2023)
A.
Auxins
B.
Cytokinins
C.
Gibberellins
D.
Ethylene
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Solution
Auxins are responsible for apical dominance, inhibiting the growth of lateral buds.
Correct Answer: A — Auxins
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Q. Which policy was introduced by the British to control the Indian press and curb dissent during the early 20th century?
A.
The Vernacular Press Act
B.
The Indian Press Act
C.
The Rowlatt Act
D.
The Arms Act
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Solution
The Vernacular Press Act of 1878 was aimed at curbing the freedom of the press in Indian languages, reflecting the British government's attempt to control dissent.
Correct Answer: A — The Vernacular Press Act
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Q. Which polymer is commonly used in 3D printing?
A.
PLA
B.
PVC
C.
Nylon
D.
Polyethylene
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Solution
PLA (Polylactic Acid) is a commonly used polymer in 3D printing due to its ease of use and biodegradability.
Correct Answer: A — PLA
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Q. Which polymer is commonly used in the production of fibers for clothing? (2020)
A.
Polyethylene
B.
Nylon
C.
Polystyrene
D.
Polyvinyl acetate
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Solution
Nylon is commonly used in the production of fibers for clothing due to its strength and elasticity.
Correct Answer: B — Nylon
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Q. Which polymer is commonly used in the production of non-stick cookware? (2023)
A.
Polyethylene
B.
Polytetrafluoroethylene (PTFE)
C.
Polypropylene
D.
Polyvinyl chloride (PVC)
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Solution
Polytetrafluoroethylene (PTFE), commonly known as Teflon, is used in non-stick cookware due to its low friction properties.
Correct Answer: B — Polytetrafluoroethylene (PTFE)
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Q. Which polymer is commonly used in the production of plastic bottles?
A.
Polypropylene
B.
Polyethylene terephthalate
C.
Polystyrene
D.
Polyvinyl chloride
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Solution
Polyethylene terephthalate (PET) is commonly used in the production of plastic bottles.
Correct Answer: B — Polyethylene terephthalate
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Q. Which polymer is commonly used in the production of rubber?
A.
Polyethylene
B.
Natural rubber
C.
Polystyrene
D.
Polyvinyl chloride
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Solution
Natural rubber is a polymer that is widely used in the production of rubber products.
Correct Answer: B — Natural rubber
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Q. Which polymer is commonly used in the production of synthetic fibers? (2023)
A.
Polyethylene
B.
Nylon
C.
Polystyrene
D.
Polyvinyl acetate
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Solution
Nylon is a synthetic polymer widely used in the production of synthetic fibers for clothing and textiles.
Correct Answer: B — Nylon
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Q. Which polymer is known for its high resistance to heat and chemicals?
A.
Polyethylene
B.
Teflon
C.
Nylon
D.
Acrylic
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Solution
Teflon is known for its high resistance to heat and chemicals.
Correct Answer: B — Teflon
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Q. Which polymer is known for its high resistance to heat?
A.
Polyethylene
B.
Teflon
C.
Polypropylene
D.
PVC
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Solution
Teflon (PTFE) is known for its high heat resistance and non-stick properties.
Correct Answer: B — Teflon
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Q. Which preposition is used to indicate a relationship? (2021)
A.
with
B.
at
C.
in
D.
on
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Solution
'With' is used to indicate a relationship or association between two entities.
Correct Answer: A — with
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Q. Which preposition is used to indicate a specific time? (2021)
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Solution
The preposition 'at' is used to indicate a specific time, such as 'at 5 PM'.
Correct Answer: A — at
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Q. Which preposition is used to show direction? (2020)
A.
to
B.
with
C.
about
D.
for
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Solution
The preposition 'to' is used to show direction, as in 'going to the store'.
Correct Answer: A — to
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Q. Which principle explains why a ship floats on water?
A.
Archimedes' principle
B.
Bernoulli's principle
C.
Pascal's principle
D.
Newton's third law
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Solution
Archimedes' principle states that a body submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced.
Correct Answer: A — Archimedes' principle
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