NEET Botany Plant Growth and Development MCQs

Choose the correct statement

I. Cytokinin – Delay of leaf senescene

II. Auxin – Apical dominance

III. Ethylene – Seed germination

IV. Gibberellins – Immature falling of leaves

Natural cytokinins are synthesised in which regions of plants?

Study the following statement

I. Cytokinins are formed primarily in roots

II. Auxin and cytokinin are antagonistic in apical dominance

III. Kinetin (a modified DNA purine) was discovered from herring sperm

IV. Zeatin is auxin

V. Zeatin was firstly extracted from herring

Choose the incorrect one

Pick out the correct statements.

i. Cytokinins especially help in delaying senescence.

ii. Auxins are involved in regulating apical dominance.

iii. Ethylene is especially useful in enhancing seed germination.

iv. Gibberellins are responsible for immature falling of leaves.

Cytokinins are formed in

Which hormone (PGR) encounters the apical dominance induced by auxin?

Cytokinin helps in delaying the leaf falling/senescences mainly by

The following statements are given about plant growth hormones:

I.Cytokinins suppress the synthesis of chlorophyll.

II.Auxins control apical dominance.

III.Gibberellins promote shoot elongation.

IV.Abscisic acid enabling seeds to withstand desiccation.

Which of the above statements are correct?

The problem of necrosis and gradual senescence, while performing tissue culture can be overcome by

Which of the following functions is/are not the function/s of cytokinin?

I. New leaves formation

II. Chloroplast formation in leaves

III. Lateral shoot formation

IV. Adventitious shoot formation

V. Rooting on stem cuttings

Choose the correct option