Mcq Subject: Biochemistry

Which of the following is not a component of transpo system?

A. Receptor activation

B. Selective gate

C. Non-selective channel

D. Energy coupling system

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Rate limiting step in cholesterol synthesis is catalysed by which of the following enzyme?

A. HMG CoA synthetase

B. HMG CoA reductase

C. Thiokinase

D. Mevalonate kinase

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Which of the following vitamin reduces the risk of insulin resistance, obesity, and the metabolic syndrome?

A. Vitamin A

B. Vitamin C

C. Vitamin D

D. Vitamin B12

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In Familial hypercholesterolemia there is deficiency of

A. LDL receptor

B. Apoprotein A

C. Apo protein C

D. Lipoprotein lipase

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Which of the following is the main enzyme responsible for activation of xenobiotics?

A. Cytochrome P-450

B. Glucuronyl transferase

C. Glutathione S-transferase

D. NADPH cytochrome P-450-reductase

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All of the following could include the mechanism or function of oxigenases, EXCEPT:

A. Incorporate 2 atoms of oxygen

B. Incorporate 1 atom of oxygen

C. Required for hydroxylation of steroids

D. Required for carboxylation of drugs

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In chronic alcoholism the rate limiting component for alcohol metabolism excluding enzymes is/are : (PGI Dec 2008)

A. NADP

B. NAD+

C. NADPH

D. FADH

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Which vitamin is supplied from only animal source:

A. Vitamin C

B. Vitamin B7

C. Vitamin B12

D. Vitamin D

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