Question

Match the plant growth hormones of Column-I with suitable chemical derivatives present Column-II and choose the correct option given below:

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

Hint:

Auxin is an indole derivative, while Gibberellins are terpenoids.

Answer 1

The Correct Option is A

• Hormone Derivatives:
  • (a) Abscisic acid: Derived from carotenoids, a plant stress hormone. Matches (iii).
  • (b) Gibberellins: Terpenoid compounds that promote growth. Matches (iv).
  • (c) Kinetin: A synthetic cytokinin, an adenine derivative. Matches (i).
  • (d) Auxin: Primarily indole-3-acetic acid (IAA), an indole derivative. Matches (ii).
• Option Analysis:
  • (1) a-iii, b-iv, c-i, d-ii: Correctly matches Abscisic acid (carotenoid), Gibberellins (terpenes), Kinetin (adenine), and Auxin (indole). Correct.
  • (2) a-iii, b-i, c-ii, d-iv: Incorrect for b (Gibberellins are not adenine derivatives) and c, d.
  • (3) a-i, b-ii, c-iii, d-iv: Incorrect for a (Abscisic acid is not adenine) and b, c, d.
  • (4) a-iii, b-i, c-iv, d-ii: Incorrect for b (Gibberellins are not adenine) and c.
• Conclusion: The correct option is (1), as it accurately pairs the plant hormones with their chemical derivatives.