Q1. [1] medium exam-ready
Which of the following correctly pairs a hormone with the process it primarily controls?
(A) Insulin — regulation of blood calcium levels
(B) Thyroxin — stimulation of uterine contractions during childbirth
(C) Testosterone — development of male secondary sexual characteristics at puberty
(D) Adrenaline — regulation of growth and metabolism in infants
- A Insulin — onset of puberty in males
- B Testosterone — development of male secondary sexual characteristics at puberty
- C Adrenaline — regulation of menstrual cycle in females
- D Thyroxin — development of female sex organs
Generated by claude-sonnet-4-6 · 2026-06-26 01:00 · grounding rag
Model Answer
(B) Testosterone — development of male secondary sexual characteristics at puberty
Explanation
The source passage (Chapter 7, Male Reproductive System) explicitly states that "testosterone brings about changes in appearance seen in boys at the time of puberty," directly supporting option B. The other options incorrectly pair hormones with unrelated processes.