biochemistry MCQs – Page 8

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

biochemistry Mcqs
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

361. Mannose 6 phosphate containing freshly synthesized proteins are directed to_____________?
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A. Golgi apparatus

B. Mitochondria

C. Nucleus

D. Lysosomes
362. Fatty aids help in synthesis of all except____________?
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A. Glucose

B. Ketone bodies

C. Cholesterol

D. Fat

363. Consumption of raw egg white in the diet may result in the deficiency of______________?
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A. Thiamine

B. Biotin

C. Riboflavin

D. Pyridoxine

364. Ketone body formation takes place in_______________?
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A. Blood

B. Spleen

C. Liver

D. Kidney

365. Lipid from tissue is carried to liver by_____________?
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A. VLDL

B. Chylomicrons

C. HDL

D. LDL

366. Glutamine replaced by valine in sckle cell anaemia is characterized________________?
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A. Non Sense mutation of beta chain

B. Deletion of beta chain

C. Degradation of beta chain

D. Missense mutation of beta chain
367. Which base is not found in DNA________________?
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A. Cytosine

B. Guanine

C. Uracil

D. Adenine

368. The normal level of serum cholesterol is_______________?
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A. 150-250 mgs/100 ml

B. 260-360 mgs/100 ml

C. 100-140 mgs/100 ml

D. 80-250 mgs/100 ml

369. The fluid mosaic model of membrane structure was proposed by_______________?
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A. Edwarg Angle

B. G.V Black

C. Watson and Crick

D. Singer and Nicolson
370. Hyponatremia is defined as a serum Na+ level ____________________?
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A. < 160 mmo/L

B. >135 mmol/L

C. < 100 mmo/L

D. < 135 mmol/L
371. A patient of type 2 diabetes mellitus is given nutrition rich in________________?
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A. Fibre rich diet

B. Fat

C. Proteins

D. Carbohydrates

372. The protein rich in basic amino acids, which functions in the packaging of DNA is chromosomes is______________?
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A. Hyaluronic acid binding protein

B. Fibrinogen

C. Collagen

D. Histone
373. Limiting factory for fatty acid synthesis_________________?
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A. Acetyl CoA carboxylase

B. Acyl transferase

C. Aceto acetate synthetase

D. Biotin

374. Non polar lipid act as______________?
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A. Electrical insulators

B. Irons

C. Electrolytes

D. Non electrical insulators

375. Which of the following is most important content of diet ?
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A. Vitamin

B. Water

C. Protein

D. Minerals
376. The following are derived from cholesterol, EXCEPT_____________?
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A. Bile acids

B. Energy

C. Vitamin D

D. Steroid hormones

377. The most important buffer in RBC is____________?
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A. O2Hb +K hemoglobinate

B. H2CO3 +NAHCO3

C. H2CO3 + KHCO3

D. O2 Hb +Na hemoglobinate

378. Ammonia produced by brain is trapped as_____________?
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A. Urea

B. Glutamine

C. Creatinine

D. Uric Acid

379. FSH, LH, TSH acts through_________________?
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A. Cyclic AMP

B. Cyclic GMP

C. Calcium release

D. Adenosine cyclate

380. Urinary protein is detected by______________?
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A. Hays test

B. Ehrlichs test

C. Barfoed test

D. Boiling test
381. True about prostaglandins is______________?
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A. All are true

B. Short acting

C. Present in many tissues

D. Some require C-AMP for their action

382. Synthesis of protein occurs on__________________?
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A. Poly ribosomes

B. Golgi bodies

C. Mitochondria

D. Nucleus

383. Adipose tissue releases free fatty acids in the________________?
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A. Active state

B. All of the above

C. Resting state

D. Fasting state
384. Prostaglandin synthesis is partially switched off by______________?
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A. Cyclo-oxygenase inhibition

B. Lipo oxygenase inhibition

C. Peroxidase

D. Reductase

385. Translation occurs at______________?
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A. Nucleus

B. Centrosome

C. Ribosome

D. Mitochondria

386. Average daily dose of vitamin C is____________?
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A. 100 150 mg

B. 60 100 mg

C. 50 60 mg

D. 30 40 mg

387. Urea is produced by the enzyme_____________?
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A. Glutaminase

B. Arginase

C. Uricase

D. Urease

388. Following are the essential amino acid______________?
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A. Phenylalanine, Arginine Methinonine

B. Phenylalanine, Tryptophan lysine

C. Phenylalanine, Valine, Glycine

D. Histidine, Glutamine, Valine

389. During phagocytosis, the metabolic process called respiratory burst involves the activation of_____________?
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A. Peroxidase

B. Dehydrogenase

C. Oxidase

D. Hydrolase

390. Alkaptonuria an inherited metabolic disorder is due to the deficiency of____________?
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A. Pheylalanine hydroxylase

B. Homogentisate oxidase

C. Tyrosine transaminase

D. Cystathionase

391. Heme in haemoglobin is____________?
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A. Between Helix C and D

B. Surrounded by non polar environment

C. Bonded to E7 histidine

D. Protoporophyrin IX
392. The reducing end of glutathione, the amino acid is_________________?
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A. Valine

B. Leucine

C. Glycine

D. Lycie

393. Vitamin associated with one carbon transfer is__________?
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A. Niacin

B. Ascorbic acid

C. Thiamine

D. Folic acid
394. The major driving force for formation of membrane lipid bilayer is____________?
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A. Not known

B. Hydrogen bonding

C. Vander wall forces

D. Hydrophobic interactions
395. The amino acid from which niacin is synthesized is______________?
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A. Tyrosine

B. Theronine

C. Tryptophan

D. Histidine

396. The abundant glycoprotein in the basement membrane and has binding domain for both ECM and cell-surface receptor is______________?
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A. Laminin

B. Fibronectin

C. Tenascin

D. E Cadherins

397. Daily requirement of iron in man is_____________?
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A. 10 mg

B. 1gm

C. 20 mg

D. 10 microgram

398. The patient suffered from hypogondism, failure to thrive, lose of taste and unable to maintain stability. This shows the deficiency of_____________?
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A. Chromium

B. Zinc

C. Copper

D. Potassium

399. In ECF main electrolyte is_______________?
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A. Proteins

B. Cl

C. K+

D. Na+
400. Which of the following organs cannot use ketone bodies_______________?
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A. Kidney

B. Spleen

C. Liver

D. Brain