Biochemistry Questions and Answers – Biosynthesis of Cholesterol, Steroids and Isoprenoids

This set of Biochemistry Question Bank focuses on “Biosynthesis of Cholesterol, Steroids and Isoprenoids”.

1. Generally, the receptors for steroid hormones reside at ___________
a) Nucleoplasm
b) Nuclear membrane
c) Cytoplasm
d) Plasma membrane
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2. Steroids have ___________
a) Sterol nucleus with two alkyl chain attached to the ring D of cholesterol
b) Sterol nucleus with two CH₃ between C and D ring and A and B ring of cholesterol
c) Sterol nucleus without CH₃ between C ring and D ring of cholesterol
d) Sterol nucleus but lack the alkyl chain attached to the ring D of cholesterol
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3. Prednisolone and prednisone are chemically ___________
a) Steroids
b) Glycerol derivatives
c) Non-steroid anti-inflammatory drug
d) Amino alcohols
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4. The essential intermediates in the pathway from acetate to cholesterol are ___________
a) Acetic acid
b) Ethylene
c) Isoprene units
d) Methane
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5. Which is the first intermediate in cholesterol synthesis?
a) Mevalonate
b) Isoprene
c) Squalene
d) Ethylene
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6. How many carbons are present in HMG co-A?
a) 2
b) 3
c) 5
d) 6
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7. Which of the following is the major point of regulation on the pathway to cholesterol?
a) Thiolase
b) HMG co-A synthase
c) HMG co-A reductase
d) Pyruvate kinase
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8. Which of the following is the integral membrane protein of smooth ER?
a) Thiolase
b) HMG co-A synthase
c) HMG co-A reductase
d) Pyruvate kinase
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9. How many carbons are present in geranyl pyrophosphate?
a) 8
b) 9
c) 10
d) 11
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10. Which of the following regulates the female reproductive cycle?
a) Progesterone
b) Testosterone
c) Estrogens
d) Glucocorticoids
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Sanfoundry Global Education & Learning Series – Biochemistry.

To practice Biochemistry Question Bank, here is complete set of 1000+ Multiple Choice Questions and Answers.