The main effect of cytokinin in plants is to

Improve the quality of fruits

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Prevent the growth of lateral buds

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Regulate opening and closing of stomata

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Stimulate cell division

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Solution

The correct option is D Stimulate cell division
Cytokinins are a class of plant growth substances (phytohormones) that promote cell division, or cytokinesis, in plant roots and shoots. They are involved primarily in cell growth and differentiation, but also affect apical dominance, axillary bud growth, and leaf senescence.
Cytokinins are the plant hormones which promote cell division in plants. Cytokinins also help in breaking the dormancy of seeds and buds. They delay the ageing in leaves.
So, the correct answer is 'stimulates cell division'

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Similar questions

Q. Match the plant hormones listed in column I with their major role listed in column II and select the corret option from the codes given below.

Column I	Column II
(A) Auxin	(i) Fruit ripening
(B) Cytokinin	(ii) Phototropism
(C) Abscisic acid	(iii) Suppression of cell division
(D) Ethylene	(iv) Stomatal opening and closing
	(v) Growth of lateral buds

Q. Cytokinins help in accelerating cell growth and cell division.

Q. Choose the right from the following.
(i) In light, hormone auxin, helps the cells to grow longer in plants.
(ii) Plant hormone gibberellins help in growth of a stem.
(iii) Cytokinin inhibits cell division.
(iv) Abscisic acid promotes growth in plants.

Question 11
The main function of abscisic acid in plants is to

(a) increase the length of cells
(b) promote cell division
(c) inhibit growth
(d) promote growth of stem

Q. What are the effects of cytokinins on plant growth?

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