Chemical Coordination and Regulation Question 48
48. A candidate vaccine for male contraception is based on
(a) follicle stimulating hormone
(b) progesterone
(c) testosterone
(d) luteinizing hormone
Show Answer
Answer : c
Hints & Solutions
(c) Progesterone is a steroid hormone secreted by corpus luteum and causes routine temporary changes in the endometrial lining of uterus. Follicle stimulating hormone secreted by anterior pituitary lobe stimulates spermatogenesis in testes of males. Luteinizing hormone activates Leydig’s cells of testes to secrete testosterones. The TYR gene provides instructions for making an enzyme called tyrosinase. This enzyme is located in melanocytes, which are specialized cells that produce a pigment called melanin. Melanin is the substance that gives skin, hair, and eyes their color. Tyrosinase is responsible for the first step in melanin production.
