Q. Which phase of the cell cycle is characterized by the division of the nucleus? (2018)
A.
Interphase
B.
Mitosis
C.
Cytokinesis
D.
G2 phase
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Solution
Mitosis is the phase of the cell cycle where the nucleus divides, resulting in two nuclei.
Correct Answer: B — Mitosis
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Q. Which phase of the cell cycle is characterized by the preparation for mitosis? (2021)
A.
G1 phase
B.
S phase
C.
G2 phase
D.
M phase
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Solution
The G2 phase is where the cell prepares for mitosis, ensuring all DNA is replicated and the cell is ready to divide.
Correct Answer: C — G2 phase
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Q. Which phase of the cell cycle is characterized by the replication of DNA? (2023)
A.
G1 phase
B.
S phase
C.
G2 phase
D.
M phase
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Solution
The S phase is specifically designated for DNA replication, ensuring that each daughter cell receives a complete set of genetic material.
Correct Answer: B — S phase
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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 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 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 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 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 principle states that the pressure in a fluid decreases as the fluid's velocity increases? (2022)
A.
Bernoulli's Principle
B.
Archimedes' Principle
C.
Pascal's Principle
D.
Hydrostatic Principle
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Solution
Bernoulli's Principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure.
Correct Answer: A — Bernoulli's Principle
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Q. Which process do plants use to convert sunlight into energy? (2022)
A.
Cellular respiration
B.
Photosynthesis
C.
Fermentation
D.
Transpiration
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Solution
Plants use photosynthesis to convert sunlight into chemical energy.
Correct Answer: B — Photosynthesis
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Q. Which process is primarily responsible for the movement of water in plants? (2020)
A.
Diffusion
B.
Osmosis
C.
Active transport
D.
Transpiration
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Solution
Transpiration creates a negative pressure in the leaves, which helps in the upward movement of water through the xylem.
Correct Answer: D — Transpiration
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Q. Which process is responsible for the movement of water across a semi-permeable membrane? (2020)
A.
Diffusion
B.
Osmosis
C.
Active transport
D.
Facilitated diffusion
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Solution
Osmosis is the process by which water moves across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration.
Correct Answer: B — Osmosis
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Q. Which process is responsible for the movement of water across a semipermeable membrane? (2020)
A.
Diffusion
B.
Osmosis
C.
Active transport
D.
Facilitated diffusion
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Solution
Osmosis is the process of movement of water across a semipermeable membrane.
Correct Answer: B — Osmosis
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Q. Which process is used by cells to obtain energy from glucose? (2022)
A.
Photosynthesis
B.
Fermentation
C.
Cellular respiration
D.
Transpiration
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Solution
Cells obtain energy from glucose through the process of cellular respiration.
Correct Answer: C — Cellular respiration
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Q. Which property of a material describes its ability to return to its original shape after deformation? (2023)
A.
Plasticity
B.
Elasticity
C.
Ductility
D.
Brittleness
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Solution
Elasticity is the property that allows a material to return to its original shape after deformation.
Correct Answer: B — Elasticity
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Q. Which property of fluids is defined as the resistance to flow?
A.
Density
B.
Viscosity
C.
Pressure
D.
Surface Tension
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Solution
Viscosity is the property of fluids that describes their resistance to flow.
Correct Answer: B — Viscosity
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Q. Which protein forms the thick filaments in muscle fibers? (2020)
A.
A. Actin
B.
B. Myosin
C.
C. Tropomyosin
D.
D. Troponin
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Solution
Myosin forms the thick filaments in muscle fibers and interacts with actin during contraction.
Correct Answer: B — B. Myosin
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Q. Which protein is primarily responsible for muscle contraction? (2019)
A.
Actin
B.
Myosin
C.
Tropomyosin
D.
Troponin
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Solution
Myosin is the primary protein that interacts with actin to facilitate muscle contraction.
Correct Answer: B — Myosin
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