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Class XI · Biology

Plant Growth and Development: NEET MCQ practice

379 practice questions on Plant Growth and Development, including 40 from past NEET papers, each with an explanation. Practise them chapter by chapter in the GyaanLoop app.

379

Practice questions

265

Easy

114

Medium

0

Hard

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What Plant Growth and Development covers

Topics in the NEET (UG) 2026–27 syllabus for this chapter.

  • Seed germination
  • Phases of plant growth and growth rate; conditions of growth
  • Differentiation, dedifferentiation and redifferentiation; sequence of developmental process in a plant cell
  • Growth regulators- auxin, gibberellin, cytokinin, ethylene, ABA

Past NEET questions on Plant Growth and Development

Try each one, then open the answer and explanation.

Question 1 · NEET 2025

Read the following statements on plant growth and development. A. Parthenocarpy can be induced by auxins. B. Plant growth regulators can be involved in promotion as well as inhibition of growth. C. Dedifferentiation is a pre-requisite for re- differentiation. D. Abscisic acid is a plant growth promoter. E. Apical dominance promotes the growth of lateral buds. Choose the option with all correct statements.

  1. A.A, B, C only
  2. B.A, C, E only
  3. C.A, D, E only
  4. D.B, D, E only
Show answer

Answer: A. A, B, C only

Parthenocarpy can be induced by auxins (A correct). Plant growth regulators like auxins promote, abscisic acid inhibits growth (B correct). Dedifferentiation precedes redifferentiation (C correct). Abscisic acid is an inhibitor, not promoter (D false). Apical dominance inhibits lateral bud growth (E false). So correct statements: A, B, C.

Question 2 · NEET 2025

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

  1. A.Ethylene
  2. B.Abscisic acid
  3. C.Gibberellin
  4. D.Cytokinin
Show answer

Answer: D. Cytokinin

Cytokinins maintain cellular division and nutrient transport, delaying senescence by mobilizing nutrients to leaves. Gibberellins also promote nutrient mobilization but are less directly linked to delaying leaf senescence than cytokinins.

Question 3 · NEET 2024

F. Skoog observed that callus proliferated from the internodal segments of tobacco stem when auxin was supplied with one of the following except:

  1. A.Extract of Vascular tissues
  2. B.Coconut milk
  3. C.Abscisic acid
  4. D.Yeast Extract
Show answer

Answer: C. Abscisic acid

Skoog found that callus growth needed auxin plus cytokinin-like factors. Coconut milk and yeast extract contain cytokinins; vascular tissue extract also can contain it. Abscisic acid inhibits growth, not promoting proliferation. So ABA would not work with auxin for callus proliferation. 'Except' means ABA is the odd one out.

Question 4 · NEET 2024

Given below are some statements about plant growth regulators. A. All GAs are acidic in nature. B. Auxins are antagonists to GAs. C. Zeatin was isolated from coconut milk. D. Ethylene induces flowering in Mango. E. Abscisic acid induces parthenocarpy. Choose the correct set of statements from the options given below:

  1. A.A, C, D
  2. B.𝐵, 𝐸
  3. C.A, B, C
  4. D.B, D, E
Show answer

Answer: A. A, C, D

Check each: A – Gibberellins are acidic (true). B – Auxins and GAs often synergize, not antagonize (false). C – Zeatin from coconut milk (true). D – Ethylene induces flowering in mango (true). E – ABA inhibits growth; auxins induce parthenocarpy (false). So true statements: A, C, D.

Question 5 · NEET 2024

Match List-I with List-II: List-I List-II A. Abscisic acid I. Promotes female flowers in cucumber B. Ethylene II. Helps seeds to withstand desiccation C. Gibberellin III. Helps in nutrient mobilisation D. Cytokinin IV. Promotes bolting in beet, cabbage etc Choose the correct answer from the options given below:

  1. A.A-II, B-III, C-IV, D-I
  2. B.A-III, B-II, C-I, D-IV
  3. C.A-II, B-I, C-IV, D-III
  4. D.A-II, B-I, C-III, D-IV
Show answer

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

Abscisic acid helps seeds withstand desiccation (II). Ethylene promotes female flowers in cucumber (I). Gibberellin promotes bolting in beet/cabbage (IV). Cytokinin helps nutrient mobilisation (III).

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