Q. Which part of the neuron transmits impulses away from the cell body? (2023)
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A.
Dendrites
-
B.
Axon
-
C.
Synapse
-
D.
Nucleus
Solution
The axon is the part of the neuron that transmits impulses away from the cell body to other neurons or muscles.
Correct Answer: B — Axon
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Q. Which part of the plant is primarily involved in photosynthesis? (2020)
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A.
Roots
-
B.
Stems
-
C.
Leaves
-
D.
Flowers
Solution
Leaves are the primary sites of photosynthesis in flowering plants due to the presence of chlorophyll.
Correct Answer: C — Leaves
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Q. Which part of the plant is responsible for photosynthesis? (2021)
-
A.
Roots
-
B.
Stems
-
C.
Leaves
-
D.
Flowers
Solution
Leaves are the primary site of photosynthesis in flowering plants due to the presence of chlorophyll.
Correct Answer: C — Leaves
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Q. Which part of the respiratory system is responsible for gas exchange? (2020)
-
A.
Bronchi
-
B.
Alveoli
-
C.
Trachea
-
D.
Larynx
Solution
Alveoli are tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide occurs.
Correct Answer: B — Alveoli
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Q. Which part of the respiratory system is responsible for the exchange of gases? (2020)
-
A.
Bronchi
-
B.
Alveoli
-
C.
Trachea
-
D.
Larynx
Solution
The alveoli are tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide occurs.
Correct Answer: B — Alveoli
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Q. Which part of the respiratory system is responsible for the majority of gas exchange? (2019)
-
A.
Bronchi
-
B.
Trachea
-
C.
Alveoli
-
D.
Larynx
Solution
The alveoli are tiny air sacs in the lungs where the majority of gas exchange occurs between air and blood.
Correct Answer: C — Alveoli
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Q. Which part of the stamen produces pollen? (2022)
-
A.
Filament
-
B.
Anther
-
C.
Style
-
D.
Ovary
Solution
The anther is the part of the stamen that produces and contains pollen.
Correct Answer: B — Anther
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Q. Which particle is responsible for the chemical properties of an atom? (2023)
-
A.
Neutrons
-
B.
Protons
-
C.
Electrons
-
D.
Nucleons
Solution
Electrons, particularly those in the outer shell, determine the chemical properties of an atom.
Correct Answer: C — Electrons
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Q. Which phase change occurs at the boiling point of a substance? (2022)
-
A.
Melting
-
B.
Sublimation
-
C.
Condensation
-
D.
Vaporization
Solution
Vaporization occurs at the boiling point when a liquid turns into gas.
Correct Answer: D — Vaporization
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Q. Which phase follows metaphase in mitosis? (2023)
-
A.
Prophase
-
B.
Anaphase
-
C.
Telophase
-
D.
Interphase
Solution
Anaphase follows metaphase, where sister chromatids are pulled apart to opposite poles of the cell.
Correct Answer: B — Anaphase
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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
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)
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A.
G1 phase
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B.
S phase
-
C.
G2 phase
-
D.
M phase
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
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
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
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B.
Gymnosperms
-
C.
Pteridophytes
-
D.
All of the above
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
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
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
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
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
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
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
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
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
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
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
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
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
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)
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
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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