biochemistry MCQs – Page 14

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

biochemistry Mcqs

261. Insulin caused lipogenesis by all except____________?
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A. Decreases intracellular cAMP level

B. Increases the transport of glucose in to the cells

C. Inhibits Pyruvate dehydrogenase

D. Increasing acetyl-CoA corboxylase activity

262. Serum creatine kinase-3 (CK-3) is elevated in_______________?
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A. Brain tumours

B. Muscular dystrophy

C. Myocardial infarction

D. Alcoholic cirrhosis

263. Which of the organelles contain DNA_________________?
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A. Ribsomes

B. Nucleus

C. Nucleolus

D. Golgi apparatus

264. Which of the following is a phospholipid________________?
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A. Oleic acid

B. Glycogen

C. Sphingomyelin

D. Prostaglandin

265. One of the following is not an amino acid______________?
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A. Glutamic acid

B. Hydroxy proline

C. Choline

D. Glycine

266. The antibacterial substance present in tears which acts by splitting cell wall components is____________?
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A. Lysozyme

B. Betalysine

C. Lactoperoxidase

D. Penicillin

267. The following vitamin is important in non-oxidative decarboxylation, transamination and transsulfuration reactions_____________?
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A. Thiamine

B. Pantothenic acid

C. Riboflavin

D. Pyridoxine

268. Collagen is rich in_____________?
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A. Glutamate and proline

B. Proline and glycine

C. Alanine and glycine

D. Glutamate and glycine

269. Which is the poorest source of calcium among the following______________?
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A. Egg yolk

B. Rice

C. Human milk

D. Cows milk

270. Unsaturated fatty acids are converted to______________?
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A. Cholesterol

B. Saturated fatty acid

C. Prostaglandins

D. Cell membrane lipid

271. The most important role of cholesterol is_____________?
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A. It is a component of cell membrane

B. It stores up energy

C. None of the above

D. It is a precursor of polyunsaturated fatty acids

272. Following is non-essential amino acid_______________?
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A. Proline

B. Phenylalanine

C. Tryptophan

D. Threonine

273. The substance essential for transfter of fatty acids across mitochondrial membrance_____________?
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A. Carnitine

B. Creatine

C. Creatinine

D. Coenzyme A

274. Generation of free radicals occurs by all of the following mechanism EXCEPT_____________?
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A. Normal metabolism

B. All of the above

C. Oxygen toxicity

D. Reperfusion after ischemic injury

275. FIGLU excretion test is to estimate deficiency of_______________?
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A. Vitamin folic acid

B. Vitamin B6

C. Niacin

D. Vitamin K

276. Normal level of serum phosphorous is_____________?
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A. 1-2 mgm%

B. 7-9 mgm%

C. 40-50 mgm%

D. 2.5 4.5 mgm%

277. Genes are_____________?
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A. Ribonucleic acid

B. Lipoproteins

C. Chromo proteins

D. Deoxy ribonucleic acid

278. Niacin & riboflavin help in_____________?
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A. Methyl group transfer

B. Amine group transfer

C. Transamination reaction

D. Redox reactions

279. False statement about haemoglobin structure________________?
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A. Hb structurally similar to myoglobin

B. Iron is present in ferrous state

C. Ferrous ions are in porphyrin rings

D. Hb has 2 polypeptide chains

280. The daily requirement of protein for the adults is_________________?
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A. 60 gms

B. 120 gms

C. 6 gms

D. 250 gms

Showing 261 to 280 of 448 mcqs