Question80:-The substrate of aromatase enzyme complex
A:-Pregnenolone and Progesterone
B:-Cholesterol and 7 dehydro cholesterol
C:-Testosterone and androstenedione

൧:-17 ൦ - Hydroxypregnenolone and 7 «
- Hydroxypregnenolone

Correct Answer:- Option-C
Question81:-All the following hormones are synthesized from Tyrosine, except
A:-Thyroid stimulating hormone
B:-Thyroxine
C:-Epinephrine
D:-Norepinephrine
Correct Answer:- Option-A

Question82:-Acute decrease in the level of plasma ionized calcium stimulates the
synthesis and secretion of

A:-Calcitriol
B:-Parathyroid hormone
C:-Calcitonin

D:-Calbindin

Correct Answer:- Option-B

Question83:-Antiotensin-Converting Enzyme (ACE) inhibitors are used to treat renin
dependent hypertension because

A:-Inhibition of ACE block the conversion of angiotensin 1 to angiotension II
B:-Inhibition of ACE block the formation of angiotensinogen

C:-Inhibition of ACE promote release of renin

D:-Inhibition of ACE decrease aldosterone release

Correct Answer:- Option-A

Question84:-Tyrosyl residues in thyroglobulin are iodinated to form thyroid
hormones but iodinated free tyrosine cannot be incorporated into thyroglobulin to
form thyroid hormones : Why?

A:-There are no tRNA in the body which recognizes iodinated tyrosine
B:-Free tyrosine cannot be iodinated
C:-Transcription of thyroglobulin blocked by iodinated free tyrosine
D:-Both 2 and 3
Correct Answer:- Option-A

Question85:-The hormone that is not produced from a larger peptide precursor
A:-Insulin