2019 source guide · Biology

NEET 2019 Biology Plant Physiology Questions

Use this page to connect the official 2019 paper with current Biology practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.

Practice 300 verified questions →Check official NTA archive ↗

What to master

photosynthesis, respiration, growth and hormonal control.

Original practice preview

These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.

Example 1 · difficulty 2/5

Dedifferentiation is the phenomenon by which living, differentiated cells regain the capacity to divide. In a woody dicot stem, which pair of secondary meristems originates through dedifferentiation?

A. Interfascicular cambium and cork cambium
B. Fascicular cambium and procambium
C. Shoot apical meristem and root apical meristem
D. Xylem parenchyma and phloem fibres

Example 2 · difficulty 1/5

A gardener repeatedly pinches off the shoot tips of a hedge, and the hedge responds by becoming dense and bushy. The physiological basis of this practice is that:

A. removing the tips reduces competition between branches for water and minerals
B. pinching directly stimulates every cell of the hedge to divide more rapidly
C. tip removal increases the supply of auxin reaching the lateral buds
D. auxin synthesised at the shoot apex normally suppresses axillary buds, so removing the tip releases them from inhibition

Example 3 · difficulty 2/5

Cabbage and beet grow as compact rosettes with extremely short internodes until they naturally flower. Spraying such a rosette plant with which of the following can cause rapid bolting (dramatic internode elongation) ahead of the normal season?

A. Abscisic acid
B. Gibberellic acid
C. Ethephon
D. Indole-3-acetic acid

The evidence-first practice loop

1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
2. Attempt closed-bookExpose the concept or execution gap before rereading.
3. Repair and returnClassify the miss and re-practice after a delay.

Canonical chapter practice

Photosynthesis in Higher Plants →Respiration in Plants →Plant Growth and Development →

Frequently asked questions

Are these official NEET 2019 Biology Plant Physiology PYQs?

No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.

How should I use the NEET 2019 paper?

Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.