Q. In which of the following processes is the enthalpy change equal to the heat absorbed by the system at constant pressure? (2019)
-
A.
Isothermal process
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B.
Isochoric process
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C.
Isobaric process
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D.
Adiabatic process
Solution
In an isobaric process, the enthalpy change is equal to the heat absorbed by the system at constant pressure.
Correct Answer: C — Isobaric process
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Q. In which part of the chloroplast does the Calvin cycle take place? (2019)
-
A.
Thylakoid membrane
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B.
Stroma
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C.
Granum
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D.
Outer membrane
Solution
The Calvin cycle takes place in the stroma of the chloroplast.
Correct Answer: B — Stroma
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Q. In which part of the flower does fertilization occur? (2019)
-
A.
Stamen
-
B.
Ovary
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C.
Style
-
D.
Petal
Solution
Fertilization occurs in the ovary, where the male gamete from the pollen fuses with the female gamete in the ovule.
Correct Answer: B — Ovary
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Q. In which part of the plant does most of the photosynthesis occur?
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A.
Roots
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B.
Stems
-
C.
Leaves
-
D.
Flowers
Solution
Most of the photosynthesis occurs in the leaves, where chloroplasts are abundant.
Correct Answer: C — Leaves
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Q. In which part of the plant does most of the respiration occur? (2020)
-
A.
Roots
-
B.
Leaves
-
C.
Stems
-
D.
Flowers
Solution
Most of the respiration occurs in the roots, where energy is needed for nutrient uptake and growth.
Correct Answer: A — Roots
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Q. In which part of the plant does most respiration occur? (2020)
-
A.
Roots
-
B.
Leaves
-
C.
Stems
-
D.
Flowers
Solution
Most respiration occurs in the roots, where energy is needed for nutrient uptake and growth.
Correct Answer: A — Roots
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Q. In which part of the plant does most transpiration occur?
-
A.
Roots
-
B.
Stems
-
C.
Leaves
-
D.
Flowers
Solution
Most transpiration occurs in the leaves, where stomata are located to facilitate gas exchange and water loss.
Correct Answer: C — Leaves
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Q. In which part of the plant does most water absorption occur?
-
A.
Leaves
-
B.
Stems
-
C.
Roots
-
D.
Flowers
Solution
Most water absorption occurs in the roots, where root hairs increase the surface area for absorption.
Correct Answer: C — Roots
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Q. In which part of the plant does respiration primarily occur? (2020)
-
A.
Roots
-
B.
Leaves
-
C.
Stems
-
D.
All parts
Solution
Respiration occurs in all parts of the plant, including roots, leaves, and stems.
Correct Answer: D — All parts
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Q. In which part of the plant does the majority of photosynthesis occur?
-
A.
Roots
-
B.
Stems
-
C.
Leaves
-
D.
Flowers
Solution
Leaves are the primary site of photosynthesis due to the presence of chlorophyll in chloroplasts.
Correct Answer: C — Leaves
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Q. In which phase do sister chromatids separate and move to opposite poles of the cell? (2019)
-
A.
Prophase
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B.
Metaphase
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C.
Anaphase
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D.
Telophase
Solution
During Anaphase, sister chromatids are pulled apart and move towards opposite poles of the cell.
Correct Answer: C — Anaphase
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Q. In which phase do sister chromatids separate and move to opposite poles? (2019)
-
A.
Prophase
-
B.
Metaphase
-
C.
Anaphase
-
D.
Telophase
Solution
During Anaphase, sister chromatids are pulled apart and move toward opposite poles of the cell.
Correct Answer: C — Anaphase
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Q. In which phase do sister chromatids separate and move towards opposite poles? (2022)
-
A.
Prophase
-
B.
Metaphase
-
C.
Anaphase
-
D.
Telophase
Solution
During Anaphase, sister chromatids are pulled apart and move towards opposite poles of the cell.
Correct Answer: C — Anaphase
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Q. In which phase of the cell cycle does cytokinesis occur? (2021)
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A.
G1 phase
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B.
S phase
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C.
M phase
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D.
G2 phase
Solution
Cytokinesis occurs during the M phase, following mitosis, to divide the cytoplasm and form two daughter cells.
Correct Answer: C — M phase
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Q. In which phase of the cell cycle does the cell spend most of its life? (2021)
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A.
M phase
-
B.
G1 phase
-
C.
S phase
-
D.
G2 phase
Solution
The G1 phase is where the cell spends most of its time growing and performing its normal functions.
Correct Answer: B — G1 phase
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Q. In which phase of the cell cycle does the cell spend the majority of its life? (2021)
-
A.
M phase
-
B.
G1 phase
-
C.
S phase
-
D.
G2 phase
Solution
The G1 phase is where the cell spends most of its life, performing normal functions and growing.
Correct Answer: B — G1 phase
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Q. In which process does a substance change from solid to gas without becoming liquid? (2022)
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A.
Melting
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B.
Sublimation
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C.
Condensation
-
D.
Evaporation
Solution
The process in which a substance changes from solid to gas without becoming liquid is called sublimation.
Correct Answer: B — Sublimation
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Q. In which process does a substance change from solid to gas? (2022)
-
A.
Melting
-
B.
Sublimation
-
C.
Evaporation
-
D.
Condensation
Solution
The process in which a substance changes from solid to gas is called sublimation.
Correct Answer: B — Sublimation
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Q. In which state of matter do particles have the strongest intermolecular forces? (2023)
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A.
Gas
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B.
Liquid
-
C.
Solid
-
D.
Plasma
Solution
In solids, particles are held together by strong intermolecular forces, giving them a definite shape and volume.
Correct Answer: C — Solid
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Q. In which type of collision is kinetic energy conserved? (2019)
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A.
Elastic collision
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B.
Inelastic collision
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C.
Perfectly inelastic collision
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D.
All of the above
Solution
In an elastic collision, both momentum and kinetic energy are conserved.
Correct Answer: A — Elastic collision
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Q. In which type of population distribution do individuals have a uniform distance between them? (2019)
-
A.
Random
-
B.
Clumped
-
C.
Uniform
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D.
None of the above
Solution
Uniform distribution occurs when individuals are evenly spaced, often due to competition for resources.
Correct Answer: C — Uniform
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Q. In which type of population growth does the growth rate decrease as the population reaches its carrying capacity? (2019)
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A.
Exponential growth
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B.
Logistic growth
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C.
Linear growth
-
D.
Cyclic growth
Solution
Logistic growth describes a population that grows rapidly at first and then slows as it approaches the carrying capacity.
Correct Answer: B — Logistic growth
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Q. In which type of reproduction do offspring inherit traits from both parents? (2020)
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A.
Asexual reproduction
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B.
Sexual reproduction
-
C.
Budding
-
D.
Fragmentation
Solution
In sexual reproduction, offspring inherit genetic material from both parents, leading to genetic variation.
Correct Answer: B — Sexual reproduction
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Q. In which type of reproduction does fertilization occur outside the body? (2022)
-
A.
Internal fertilization
-
B.
External fertilization
-
C.
Asexual reproduction
-
D.
Parthenogenesis
Solution
External fertilization occurs when the sperm and egg unite outside the body, commonly seen in aquatic organisms.
Correct Answer: B — External fertilization
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Q. In which type of reproduction does fertilization occur? (2022)
-
A.
Asexual reproduction
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B.
Binary fission
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C.
Sexual reproduction
-
D.
Budding
Solution
Fertilization occurs in sexual reproduction, where male and female gametes fuse to form a zygote.
Correct Answer: C — Sexual reproduction
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Q. In which type of reproduction does genetic variation occur? (2019)
-
A.
Asexual reproduction
-
B.
Sexual reproduction
-
C.
Binary fission
-
D.
Fragmentation
Solution
Sexual reproduction involves the combination of genetic material from two parents, leading to genetic variation.
Correct Answer: B — Sexual reproduction
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Q. In which type of reproduction does regeneration occur? (2020)
-
A.
Asexual reproduction
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B.
Sexual reproduction
-
C.
Both asexual and sexual reproduction
-
D.
None of the above
Solution
Regeneration is a form of asexual reproduction where an organism can regrow lost parts.
Correct Answer: A — Asexual reproduction
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Q. In which type of reproduction does the offspring develop from an unfertilized egg? (2022)
-
A.
Asexual reproduction
-
B.
Sexual reproduction
-
C.
Parthenogenesis
-
D.
Budding
Solution
Parthenogenesis is a form of asexual reproduction where the offspring develops from an unfertilized egg.
Correct Answer: C — Parthenogenesis
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Q. In which type of solid are the constituent particles held together by covalent bonds? (2022)
-
A.
Ionic solids
-
B.
Covalent network solids
-
C.
Metallic solids
-
D.
Molecular solids
Solution
Covalent network solids are held together by a network of covalent bonds, resulting in very high melting points.
Correct Answer: B — Covalent network solids
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Q. In which type of solid are the constituent particles held together by van der Waals forces? (2022)
-
A.
Ionic solids
-
B.
Covalent solids
-
C.
Metallic solids
-
D.
Molecular solids
Solution
Molecular solids are held together by van der Waals forces.
Correct Answer: D — Molecular solids
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