Plant Growth Regulators

IMPORTANT

Plant Growth Regulators: Overview

This topic covers concepts such as Discovery of Plant Growth Regulators, Ethephon, Growth Regulators, Growth Promoters, Growth Inhibitors, Auxin, Avena Curvature Experiment, Physiological Effects of Auxin, Applications of Auxin, etc.

Important Questions on Plant Growth Regulators

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IMPORTANT

The plant hormone controlling fruit ripening is

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Which of the following induces dormancy?

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Which of the following hormone induces cell division?

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Induction of cell division and delay in senescence is done by

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In plant, auxin synthesis occurs in

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Avena curvature test is a bioassay for examining the activity of<

HARD
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Select the correct option regarding the phytohormone to which the given molecular structure belongs.

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Select the correct statement regarding phytohormones.

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You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?

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Cytokinins are derivatives of __________.

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The growth hormone used in breaking dormancy and inducing flowering is ______.

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Which hormone initiates chloroplast formation in presence of light?

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Match the following

  List I   List II
A. Auxin i. Herring sperm DNA
B. Cytokinin ii. Inhibitor of growth
C. Gibberellin iii. Apical dominance
D. Ethylene iv. Epinasty
E. Abscisic acid v. Induces amylase synthesis

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A substance isolated from herring sperm DNA and named as 'kinetin' by

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Storage sprouting of potato can be prevented by

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A substance which is used to stimulate the increase in size of the apple fruit is

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Antiauxin used in picking cotton balls is

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Assertion : Stratification of seeds may promote their germination.

Reason Stratification promote gibberellin and cytokinins.

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Assertion : Agent orange is a mixture of 2,4-D and 2,4,5-T, used during Vietnam War.

Reason:  2,4-D and 2,4,5-T are used as herbicides.

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IMPORTANT

Which of the following enhances or induces fusion of protoplasts