Q1. Source– CSIR NET Nov 2020, Session I
Testosterone is a steroid hormone about which a set of statements are given below:
A. It is secreted by leydig cells of testes
B. It is secreted by sertoli cells of testes
C. It inhibits secretion of leutinizing hormone from anterior pitutiary
D. It does not inhibit the secretion of follicle-stimulating hormone from anterior pitutary.
Which of the following combinations represents correct statements about testosterone?
a. A and C
b. B and C
c. B and D
d. A and D
Statement Analysis
A- Secreted by leydig cells- correct
B- Secreted by sertoli cells- incorrect
C- Inhibits LH secretion- correct – negative feedback on anterior pituitary via hypothalamus
D- Does not inhibit FSH- incorrect– it does inhibit FSH indirectly
Correct answer– a. A and C
Q2. Source– CSIR NET Nov 2020, Session I
In mammals, the primary circardian clock is located in which of the following parts of the brain?
a. occipital lobe of cerebrum
b. amyglada
c. suprachiasmatic nucleus
d. frontal lobe of cerebrum
Statement Analysis
a. Occipital lobe- vision centre- incorrect
b. Amygdala- emotions and fear- incorrect
c. suprachiasmatic nucleus- Master biological clock (controls circadian rhythm)- correct
d. frontal lobe- decision making and cognition- incorrect
Correct answer– c. suprachiasmatic nucleus