Question

Which hormone is produced in root tips and germinating seeds in large amounts?

• A. Abscisic acid (ABA)
• B. Ethylene
• C. Cytokinins
• D. Gibberellins

Answer 1

The correct option is C

Cytokinins

The correct option is C:
Explanation of the correct option :

1. Cytokinins are adenine derivatives produced in the root tips and endosperm of the seeds. Kinetin is the most active of all cytokinins.
2. Cytokinins along with auxins enhance cell expansion, division, and differentiation. They delay the process of senescence by supporting a higher protein synthesis rate.

Explanation of the incorrect options:

Option A

1. Abscisic acid (ABA) is a growth-inhibiting hormone found in dormant buds and seeds of the plant.

Option B

1. Ethylene is produced in large amounts in different plant parts like stems, leaves, flowers, seeds, fruits, etc.

Option D

1. Gibberellins are produced in roots, embryos, and young leaves of the plant.

Final answer:

Cytokinins are produced in root tips and germinating seeds in large amounts.