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Botany NEET Questions — Free MCQ Practice

NEET 2025

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Given below are two statements:

Statement I: In the RNA world, RNA is considered the first genetic material evolved to carry out essential life processes. RNA acts as a genetic material and also as a catalyst for some important biochemical reactions in living systems. Being reactive, RNA is unstable.

Statement II: DNA evolved from RNA and is a more stable genetic material. Its double helical strands being complementary, resist changes by evolving repairing mechanism.

In the light of the above statements, choose the most appropriate answer:

A. Both statement I and statement II are correct B. Both statement I and statement II are incorrect C. Statement I is correct but statement II is incorrect D. Statement I is incorrect but statement II is correct

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Explanation

Both statements correctly describe the RNA-world hypothesis and the subsequent evolution of the more stable, self-repairing DNA.

NEET 2025

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Epiphytes that are growing on a mango branch is an example of which of the following?

A. Commensalism B. Mutualism C. Predation D. Amensalism

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Explanation

An epiphyte benefits (support/space) while the mango tree is unaffected — this is commensalism (+/0).

NEET 2025

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Which one of the following is an example of ex-situ conservation?

A. National Park B. Wildlife Sanctuary C. Zoos and botanical gardens D. Protected areas

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Explanation

Ex-situ conservation protects organisms outside their habitat — e.g. zoos and botanical gardens. The others are in-situ.

NEET 2025

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Given below are two statements:

Statement I: The primary source of energy in an ecosystem is solar energy.

Statement II: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP).

In the light of the above statements, choose the most appropriate answer:

A. Both statement I and statement II are correct B. Both statement I and statement II are incorrect C. Statement I is correct but statement II is incorrect D. Statement I is incorrect but statement II is correct

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Explanation

Statement I is correct. Statement II is wrong: the rate of production of organic matter during photosynthesis is gross primary productivity (GPP); NPP = GPP − respiratory loss.

NEET 2025

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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Both wind and water pollinated flowers are not very colourful and do not produce nectar.

Reason (R): The flowers produce enormous amount of pollen grains in wind and water pollinated flowers.

Choose the correct answer:

A. Both A and R are true and R is the correct explanation of A B. Both A and R are true but R is NOT the correct explanation of A C. A is true but R is false D. A is false but R is true

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Explanation

Both statements are true facts about abiotic pollination, but producing abundant pollen is not the reason flowers lack colour/nectar — so R does not explain A.

NEET 2025

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Which of the following is an example of non-distilled alcoholic beverage produced by yeast?

A. Whisky B. Brandy C. Beer D. Rum

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Explanation

Wine and beer are produced without distillation; whisky, brandy and rum are distilled beverages.

NEET 2025

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Given below are two statements:

Statement I: In a floral formula ⊕ stands for zygomorphic nature of the flower, and G̲ stands for inferior ovary.

Statement II: In a floral formula ⊕ stands for actinomorphic nature of the flower and G̲ stands for superior ovary.

In the light of the above statements, choose the correct answer:

A. Both Statement I and Statement II are correct B. Both Statement I and Statement II are incorrect C. Statement I is correct but Statement II is incorrect D. Statement I is incorrect but Statement II is correct

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Explanation

The symbol ⊕ denotes actinomorphic (radial) symmetry and G̲ (line below G) denotes a superior ovary. Hence Statement II is correct and Statement I is incorrect.

NEET 2025

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Streptokinase produced by the bacterium Streptococcus is used for:

A. Curd production B. Ethanol production C. Liver disease treatment D. Removing clots from blood vessels

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Explanation

Streptokinase is a "clot buster" used to dissolve blood clots in patients with myocardial infarction.

NEET 2025

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Which chromosome in the human genome has the highest number of genes?

A. Chromosome X B. Chromosome Y C. Chromosome 1 D. Chromosome 10

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Explanation

Chromosome 1, the largest human chromosome, carries the maximum number of genes (~2968); the Y chromosome has the fewest.

NEET 2025

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Which one of the following phytohormones promotes nutrient mobilization which helps in the delay of leaf senescence in plants?

A. Ethylene B. Abscisic acid C. Gibberellin D. Cytokinin

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Explanation

Cytokinins promote nutrient mobilisation towards leaves, thereby delaying their senescence (the "richmond–lang effect").

Botany MCQs for NEET — Practice Questions with Answers

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