Q.39

Match the items in Group I with those in Group II

Options:

(A) P-3, Q-4, R-1, S-2

(B) P-6, Q-4, R-1, S-5

(C) P-3, Q-5, R-4, S-1

(D) P-6, Q-5, R-1, S-4

Introduction

Matching questions based on the chemical nature of hormones and signaling molecules are very common in biology and medical entrance examinations. Correct answers require a clear understanding of whether a molecule is a steroid, peptide, catecholamine, or eicosanoid. In this article, we systematically match items from Group I with their appropriate classes in Group II.

Step-by-Step Matching Explanation

P) Progesterone → Steroid (6)

• Progesterone is derived from cholesterol

• It is a steroid hormone

✅ Correct match: P-6

Q) Dopamine → Catecholamine (4)

• Dopamine is synthesized from tyrosine

• It belongs to the catecholamine group

✅ Correct match: Q-4

R) Vasopressin → Peptide (1)

• Vasopressin (ADH) is a nonapeptide hormone

• Made of amino acids

✅ Correct match: R-1

S) Prostaglandin → Eicosanoid (5)

• Prostaglandins are derived from arachidonic acid

• They are classified as eicosanoids

✅ Correct match: S-5

Correct Matching

P ⁣− ⁣6,  Q ⁣− ⁣4,  R ⁣− ⁣1,  S ⁣− ⁣5​

✅ Correct Answer

Option (B)

Explanation of All Options

Option (A): P-3, Q-4, R-1, S-2

❌ Incorrect
Progesterone is not a carbohydrate, and prostaglandin is not a fatty acid.

Option (B): P-6, Q-4, R-1, S-5

✅ Correct
All hormones are correctly matched with their chemical nature.

Option (C): P-3, Q-5, R-4, S-1

❌ Incorrect
Multiple mismatches: dopamine is not an eicosanoid, vasopressin is not a catecholamine.

Option (D): P-6, Q-5, R-1, S-4

❌ Incorrect
Dopamine is not an eicosanoid, and prostaglandin is not a catecholamine.

Quick Reference Table

Final Conclusion

Understanding the biochemical classification of hormones makes matching questions straightforward. The only option that correctly matches all four molecules is:

Option (B)​