Plant Growth and Development NEET PYQs

Download Plant Growth and Development NEET PYQ PDF

Plant Growth and Development NEET PYQ PDF is a valuable resource for aspirants preparing for NEET 2026 Biology. The previous year's question paper covers topics like plant hormones, seed dormancy, photoperiodism, apical dominance, parthenocarpy, and senescence. Practising these biology MCQs helps to cover the most repeated concepts and boost confidence and accuracy. This PDF helps in quick NEET 2026 revision, structured practice with explanation aligned with NEET trends.

Plant Growth and Development NEET PYQs Analysis (2021- 2025)

According to the chapter-wise Biology weightage analysis, Plant Growth and Development consistently contributes 1-2 questions every year. This makes it a reliable but low-weightage scoring area. In the past 5 years, plant growth and development have included direct NCERT‑based Biology MCQs on plant hormones and growth processes.

Plant Growth and Development NEET Previous Year Questions (PYQs)

Practising Plant Growth and Development NEET PYQs helps you understand important concepts like plant hormones, growth regulation, and physiological processes. These questions are frequently asked in the exam and improve both conceptual clarity and accuracy.

Question 1

Which of the following phytohormones promotes nutrient mobilization, helping to delay leaf senescence in plants?

A) Gibberellin

B) Cytokinin

C) Ethylene

D) Abscisic acid

Correct Option: B (Cytokinin)

Explanation: Cytokinins delay senescence (the Richmond-Lang effect) by promoting nutrient mobilization and helping the leaf remain green longer.

Question 2

The gaseous plant growth regulator (Ethylene) is used in plants to:

A) Speed up the malting process

B) Promote root growth and root hair formation to increase the absorption surface

C) Help overcome apical dominance

D) Kill dicotyledonous weeds in the fields

Correct Option: B (Promote root growth and root hair formation to increase the absorption surface)

Explanation: Ethylene promotes root initiation and root hair formation, which significantly increases the surface area for water and mineral absorption.

Question 3

Secondary metabolites such as nicotine, strychnine, and caffeine are produced by plants for their:

A) Defence action

B) Effect on reproduction

C) Nutritive value

D) Growth response

Correct Option: A (Defence action)

Explanation: These chemicals are secondary metabolites produced by plants as a defense mechanism against grazers, browsers, and insects.

Question 4

Match the following concerning essential elements and their functions: (a) Iron (b) Zinc (c) Boron (d) Manganese | (i) Photolysis of water (ii) Pollen germination (iii) Chlorophyll biosynthesis (iv) IAA biosynthesis.

A) (a)-(iii); (b)-(iv); (c)-(ii); (d)-(i)

B) (a)-(iv); (b)-(i); (c)-(ii); (d)-(iii)

C) (a)-(ii); (b)-(i); (c)-(iv); (d)-(iii)

D) (a)-(iv); (b)-(iii); (c)-(ii); (d)-(i)

Correct Option: A ((a)-(iii); (b)-(iv); (c)-(ii); (d)-(i))

Explanation: Iron is required for chlorophyll biosynthesis; Zinc is needed for IAA (Auxin) synthesis; Boron is essential for pollen germination; Manganese is involved in the photolysis of water.

Question 5

The site of perception of light/photoperiod necessary for induction of flowering in plants is:

A) Axillary/Lateral buds

B) Pulvinus

C) Shoot apex

D) Leaves

Correct Option: D (Leaves)

Explanation: Leaves are the site of perception for photoperiodism. The hormonal signal (florigen) moves from leaves to the shoot apex to induce flowering.

Question 6

Auxin is used by gardeners to prepare weed-free lawns. No damage is caused to grass as auxin:

A) promotes abscission of mature leaves only

B) does not affect mature monocotyledon plants

C) can help in cell division in grasses

D) promotes apical dominance

Correct Option: B (does not affect mature monocotyledon plants)

Explanation: Synthetic auxins like 2,4-D are selective herbicides that kill broad-leaved dicot weeds but do not affect mature monocotyledons like grass.

Question 7

The process of growth is maximum during:

A) Senescence

B) Dormancy

C) Log phase

D) Lag phase

Correct Option: C (Log phase)

Explanation: In the "Log" or exponential phase, the rate of growth is very rapid and reaches its maximum until nutrients become limiting.

NEET 2026 Plant Growth and Development: High-Yield Topics

Plant Growth and Development NEET important questions are predictable and most scoring. Based on Biology NCERT and PYQ trends, topics like factors affecting plant growth, phases of growth in plants, arithmetic and geometric growth, differentiation, dedifferentiation, redifferentiation, plant development, and plant growth regulators are frequently asked questions from this chapter.

These Plant Growth & Development NEET PYQs often highlight direct NCERT lines, especially on hormone functions, photoperiodism vs vernalisation, and seed physiology. Practising these high‑yield topics provides clarity of plant physiology concepts and boosts exam confidence.

How to Revise Plant Growth and Development for NEET 2026

Revising the Plant Growth and Development chapter according to the NEET 2026 exam pattern helps aspirants improve speed, accuracy, and confidence. Since this chapter contributes 1-2 questions every year, solving Biology MCQs regularly gives familiarity with high-yielding topics of plant growth and development plant physiology chapter.

• Revise the NCERT thoroughly with a focus on important biology diagrams

• Practice the biology NEET question paper for accuracy

• Memorise plant hormone functions with flashcards, as these are repeated concepts asked in PYQs

• Solve the NEET 2026 mock test under strict timed exam conditions to actively recall important concepts.

• Revise the arithmetic and geometric growth in plants definitions, formulas, and NCERT examples.

• Strengthen differentiation, dedifferentiation, and redifferentiation basics