Biology 1 Solved Past Papers 2022 – 2022 Archives

Homeostasis Past Papers

Solved past paper MCQs for Homeostasis from official UHS, NUMS, SZABMU, DUHS, and KMU examinations. Includes verified distractor autopsies and step-by-step cognitive explanations.

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#1 of 1 PMDC 2022
Chemically, vasopressin (antidiuretic hormone) is classified as a:
A
Steroid hormone
B
Catecholamine
C
Peptide hormone
D
Glycoprotein hormone
View Answer & Propolis Autopsy
Correct Key: Option C Diagnostic Explanation
Concept: Chemical structure of hormones.

Solution: Vasopressin is a nonapeptide (a peptide hormone consisting of a 9-amino-acid chain) synthesized in the hypothalamus.

Why other options are incorrect:
  • Option A (Steroid): Lipid-soluble cholesterol derivatives (e.g., aldosterone, cortisol, estrogen).

  • Option B (Catecholamine): Amino acid derivatives (e.g., epinephrine, norepinephrine).

  • Option D (Glycoprotein): Complex protein hormones with carbohydrate side chains (e.g., TSH, FSH, LH).
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