Question

Match the hormones/precursors listed in Column I with their chemical type in Column II and the tissue of origin listed in Column III.

• A. P – (ii) – d ; Q – (iii) – c ; R – (iv) – a ; S – (i) – b
• B. P – (ii) – d ; Q – (iv) – a ; R – (i) – c ; S – (iii) – b
• C. P – (i) – c ; Q – (ii) – b ; R – (iv) – d ; S – (iii) – a
• D. P – (iv) – a ; Q – (i) – d ; R – (ii) – b ; S – (iii) – c

Hint:

Remember: Peptide hormones $⇒$ pancreas, pituitary.
Steroid hormones $⇒$ adrenal, gonads.
Tryptophan derivatives $⇒$ pineal (melatonin).
Glycoproteins $⇒$ pituitary hormones like FSH, LH, TSH.

Answer 1

The Correct Option is A

Step 1: Glucagon. It is a peptide hormone secreted by $\alpha$-cells of pancreas. Hence, P $⇒$ (ii) – d.
Step 2: Pregnenolone. It is a steroid precursor formed in the adrenal glands. Hence, Q $⇒$ (iii) – c.
Step 3: FSH. Follicle-stimulating hormone is a glycoprotein hormone secreted by the anterior pituitary. Hence, R $⇒$ (iv) – a.
Step 4: Melatonin. Derived from tryptophan and secreted by the pineal gland. Hence, S $⇒$ (i) – b.
Thus, the correct matching is: P – (ii) – d ; Q – (iii) – c ; R – (iv) – a ; S – (i) – b.