Question

Match the following:

Column I	Column II
a. Ethephon	(i) GA
b. Terpene	(ii) Ethylene
c. Zeatin	(iii) Natural auxin
d. IAA	(iv) Cytokinin

• A. a(ii), b(i), c(iii), d(iv)
• B. a(ii), b(i), c(iv), d(iii)
• C. a(iv), b(ii), c(iii), d(iv)
• D. a(i), b(ii), c(iii), d(iv)

Answer 1

The correct option is B a(ii), b(i), c(iv), d(iii)

Ethephon is the most widely used commercial source of ethylene, a plant growth regulator. It hastens fruit ripening and accelerates abscission (shedding or separation from the plant) in flowers and fruits.

Gibberellic acid is a plant growth promoter that helps in germination of seeds, elongation of internodes just before flowering (bolting), and stimulation of flowers. It is made up of terpene (a hydrocarbon that forms the building blocks of some plant hormones).

Zeatin is a naturally occurring cytokinin that was isolated from corn kernels and coconut milk. Cytokinin is a plant growth promoter that have useful effects on cytokinesis.

IAA stands for indole-3-acetic acid. They are the most common naturally occurring auxins. Auxins are plant growth promoters. They are produced in the growing apices of stem and root. They help in promoting apical dominance.

Following is the correct match:

Column I	Column II
a. Ethephon	(ii) Ethylene
b. Terpene	(i) GA
c. Zeatin	(iv) Natural Auxin
d. IAA	(iii) Cytokinin

So, the correct option is b.