Which one of the following hormones causes dwarf bean plants to grow tall?

Auxin

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Gibberellin

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Cytokinin

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Ethylene

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Solution

The correct option is B
Gibberellin

Gibberellins are growth hormones that stimulate cell elongation and cause plants to grow taller. So, if dwarf beans are treated with a dose of gibberellins, they can grow to the same height as the tall varieties.

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Similar questions

Hormones	Function
1.Ethylene	i. Helps in cell division.
2.Gibberellin	ii. Induces dormancy in buds and seeds
3.Cytokinin	iii. Helps in the ripening of fruit
4.Abscisic acid	iv. Causes bolting in plants

Question 03:

The effect of apical dominance can be overcome by which of the following hormone?
(a) IAA
(b) Ethylene
(c) Gibberellin
(d) Cytokinin

Plant Hormone	Functions
1. Auxin	Helps in the growth of plant tissue.
2. Cytokinin	Promotes cell division, delays aging of cells.
3. Ethylene	Inhibits growth and causes wilting of leaves, promoting dormancy of buds.
4. Gibberellin	This is a gaseous hormone that causes the ripening of fruits

Question 20.01:

Where are the following hormone synthesised in plants?
IAA

Gibberellins

Cytokinins

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