Question

Which of the following hastens the ripening of fruits?

• A. Auxins
• B. Ethylene
• C. Gibberellins
• D. Cytokinins

Answer 1

The correct option is B

Ethylene

The correct option is B:

Explanation of the correct option:

1. Ethylene is a gaseous plant hormone
2. It helps in fruit ripening and leaf abscission.

Explanation of the incorrect option:

Option A:

1. Auxins are water-soluble plant growth hormones.
2. Functions:
   1. They are responsible for the growth and development of plants.
   2. They help in all elongation, cell division, root generation, and control tropic movement of the plants.

Option C:

1. Gibberellins is a growth-controlling plant hormone. It was first discovered in Japan and it was isolated from a fungus called Gibberella fujikuroi.
2. Functions:
   1. It helps in stem elongation, seed germination, etc.
   2. It also helps in breaking seed dormancy.

Option D:

1. Cytokinins are one kind of growth-regulating plant hormone that is produced in the growing regions of roots and shoots, immature endosperm, etc.
2. Functions:
   1. The retardation of senescence by cytokinin is a well-known phenomenon.
   2. It prevents the uncontrolled growth of roots and stems by inhibiting cell elongation.