biochemistry MCQs – Page 18

Practise focused biochemistry questions with marked answers for exam preparation and subject revision.

biochemistry Mcqs

341. Rate limiting step in cholesterol synthesis is_______________?
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A. HMG CoA lyase

B. HMG CoA reductase

C. Mevalonate synthetase

D. HMG CoA synthetase

342. The transmembrane adhesive molecules present in hemi desmosomes which specifically binds to basal lamina glycoprotein laminin are______________?
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A. a and B catenin

B. The catenins desmoplakin

C. Integrin a6-B4

D. cadherins desmoglein

343. Which of the following is a precursor of protoporphyrin_______________?
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A. Glycine

B. Leucine

C. Alanine

D. Histidine

344. The vitamin K dependent proteins C and S are characterized by their ability to inactivate factor_____________?
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A. VIII a

B. VIII a and V a

C. None of the above

D. V a

345. A fatty acid that is not synthesized in man is_____________?
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A. Palmitic acid

B. Oleic acid

C. Stearic acid

D. Linoleic acid

346. Argentaffinoma is characterized by excess excretion of_____________?
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A. 5- Hydroxy indole acetate

B. 3- Hydroxy phenyl pyruvate

C. Phenyl acetate

D. Phenyl lactate

347. The portion of DNA in Which RNA polymerase binds and starts transcription is called______________?
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A. Operator

B. Terminator

C. Anti terminator

D. Promoter region

348. The reducing equivalent for fatty acid synthesis is derived form____________?
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A. Krebs cycle

B. Urea cycle

C. Glycolysis

D. Pentose phosphate pathway

349. The ketone bodies, which are excreted in diabetic ketoacidosis ?
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A. Acetoacetic acid and oxalocacetic acid

B. Acetoacetic acid and pyruvic acid

C. Acetoacetic acid and beta hydroxyl butyric acid

D. Acetoacetic acid and alpha ketoglutaric acid

350. Under metabolic conditions associated with a high rate of fatty acid oxidation liver produces________________?
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A. Acetoacetate

B. Cholesterol

C. Glutamate

D. Glycine

351. Peroxidase enzyme contain______________?
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A. Magnesium

B. Selenium

C. Chromium

D. Calcium

352. Somatomedin mediates________________?
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A. Deposition of chondroitin sulfate

B. Lipolysis

C. Gluconeogenesis

D. Decreased rate of glucose uptake by cells

353. Most common non protein nitrogenous fraction of blood_____________?
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A. Urea

B. Uric acid

C. Urobilinogen

D. Creatinin

354. The fastest moving fraction of protein in serum When subjected to paper electrophoresis is_____________?
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A. Alpha 1 globulin

B. Albumin

C. Beta Globulin

D. Gamma Globulin

355. In all the following RNA participates directly except________________?
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A. Splicing

B. Post translation modification

C. DNA replication

D. Post transcriptional modification

356. A balanced diet consists of______________?
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A. 20% proteins, 25% fats, 50% carbohydrates

B. 35% proteins, 15% fats, 50% carbohydrates

C. 25% proteins, 25% fats, 50% carbohydrates

D. 20% proteins, 35% fats, 45% carbohydrates

357. Ammonia is detoxified in liver to form____________?
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A. Creatinine

B. Glutamine

C. Uric acid

D. Urea

358. Normal serum alkaline phosphatase level is_____________?
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A. 1-4 Bodansky units

B. 1000-4000 Bodansky units

C. 100-400 Bodansky units

D. 0.1-0.4 Bodansky units

359. Triglyceride synthesis synthesis is increased by______________?
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A. Insulin

B. Cortisol

C. Growth hormone

D. Gulcagon

360. Tertiary structure of protein is maintained by all except______________?
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A. Disulphide bond

B. Ionic bond

C. H2 bond

D. None of the above

E. Hydrophobic

Showing 341 to 360 of 448 mcqs