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NEET Practice Questions (MCQs) with Answers & Solutions

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All Physics Chemistry Botany Zoology

NEET 2025

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Match List I with List II:

List I — A. Scutellum, B. Non-albuminous seed, C. Epiblast, D. Perisperm

List II — I. Persistent nucellus, II. Cotyledon of Monocot seed, III. Groundnut, IV. Rudimentary cotyledon

Choose the option with all correct matches:

A. A-II, B-III, C-IV, D-I B. A-IV, B-III, C-II, D-I C. A-IV, B-III, C-I, D-II D. A-II, B-IV, C-III, D-I

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Explanation

Scutellum → cotyledon of a monocot seed (II); Non-albuminous seed → groundnut (III); Epiblast → rudimentary cotyledon (IV); Perisperm → persistent nucellus (I).

NEET 2025

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Silencing of specific mRNA is possible via RNAi because of:

A. Complementary dsRNA B. Inhibitory ssRNA C. Complementary tRNA D. Non-complementary ssRNA

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Explanation

RNAi silences a target mRNA through complementary double-stranded RNA (dsRNA) that triggers degradation of the complementary mRNA.

NEET 2025

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Genes R and Y follow independent assortment. If RRYY produce round yellow seeds and rryy produce wrinkled green seeds, what will be the phenotypic ratio of the F₂ generation?

A. Phenotypic ratio - 1 : 2 : 1 B. Phenotypic ratio - 3 : 1 C. Phenotypic ratio - 9 : 3 : 3 : 1 D. Phenotypic ratio - 9 : 7

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Explanation

A dihybrid cross with independent assortment gives the classic F₂ phenotypic ratio 9 : 3 : 3 : 1.

NEET 2025

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Histones are enriched with:

A. Lysine & Arginine B. Leucine & Lysine C. Phenylalanine & Leucine D. Phenylalanine & Arginine

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Explanation

Histones are positively charged (basic) proteins rich in the basic amino acids lysine and arginine, enabling them to bind the negatively charged DNA.

NEET 2025

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Which of the following is the unit of productivity of an Ecosystem?

A. $\text{gm}^{-2}$ B. $\text{KCal m}^{-2}$ C. $\text{KCal m}^{-3}$ D. $(\text{KCal m}^{-2})\text{yr}^{-1}$

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Explanation

Productivity is a rate (energy fixed per unit area per unit time), so its unit is $(\text{kcal m}^{-2})\text{yr}^{-1}$.

NEET 2025

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With the help of the given pedigree, find out the probability for the birth of a child having no disease and being a carrier (has the disease mutation in one allele of the gene) in F₃ generation.

A. 1/4 B. 1/2 C. 1/8 D. Zero

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Explanation

The F₂ cross is between a carrier female (Aa) and an affected male (aa). Offspring are ½ Aa (unaffected carrier) : ½ aa (affected). The probability of an unaffected carrier child is 1/2.

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): Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus.

Reason (R): Presence of more than one nucleus in the tapetum increases the efficiency of nourishing the developing microspore mother cells.

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

The tapetum nourishes developing pollen; its cells have dense cytoplasm and are multinucleate, which raises their nourishing efficiency — R correctly explains A.

NEET 2025

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How many meiotic and mitotic divisions need to occur for the development of a mature female gametophyte from the megaspore mother cell in an angiosperm plant?

A. 2 Meiosis and 3 Mitosis B. 1 Meiosis and 2 Mitosis C. 1 Meiosis and 3 Mitosis D. No Meiosis and 2 Mitosis

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Explanation

The megaspore mother cell undergoes 1 meiosis (→ 4 megaspores, one functional), then 3 free-nuclear mitotic divisions give the 8-nucleate embryo sac. So 1 meiosis + 3 mitosis.

NEET 2025

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Which of the following is an example of a zygomorphic flower?

A. Petunia B. Datura C. Pea D. Chilli

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Explanation

Pea (Pisum) has a zygomorphic (bilaterally symmetrical) flower; Petunia, Datura and Chilli are actinomorphic.

NEET 2025

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Given below are two statements:

Statement I: Fig fruit is a non-vegetarian fruit as it has enclosed fig wasps in it.

Statement II: Fig wasp and fig tree exhibit mutual relationship as fig wasp completes its life cycle in fig fruit and fig fruit gets pollinated by fig wasp.

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 are correct: the fig encloses wasps, and the fig–fig wasp pair is a classic example of obligate mutualism (the wasp completes its life cycle in the fig and pollinates it).

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