FREE BIOCHEMISTRY MCQs WITH ANSWER

FREE BIOCHEMISTRY MCQs WITH ANSWER

1. Animal fat is in general
(A) Poor in saturated and rich in polyunsaturated fatty acids
(B) Rich in saturated and poor in polyunsaturated fatty acids
(C) Rich in saturated and polyunsaturated fatty acids
(D) Poor in saturated and polyunsaturated fatty acids

 2. In the diet of a diabetic patient, the recommended carbohydrate intake should preferably be in the form of
(A) Monosaccharides
(B) Dissaccharides
(C) Polysaccharides
(D) All of these

3. Obesity increases the risk of
(A) Hypertension
(B) Diabetes mellitus
(C) Cardiovascular disease
(D) All of these

 4. Worldwide, the most common vitamin deficiency is that of
 (A) Ascorbic acid
 (B) Folic acid
 (C) Vitamin A
 (D) Vitamin D

 5. Consumption of iodised salt is recommended for prevention of
 (A) Hypertension
 (B) Hyperthyroidism
 (C) Endemic goitre
 (D) None of these

 6. Restriction of salt intake is generally recommended in
 (A) Diabetes mellitus
 (B) Hypertension
 (C) Cirrhosis of liver
 (D) Peptic ulcer 

7. Polyuria can occur in
 (A) Diabetes mellitus
 (B) Diarrhoea
 (C) Acute glomerulonephritis
 (D) High fever

 8. Normal specific gravity of urine is 
(A) 1.000–1.010 
(B) 1.012–1.024 
(C) 1.025–1.034 
(D) 1.035–1.045 

9. Specific gravity of urine is raised in all of the following except 
(A) Diabetes mellitus 
(B) Diabetes insipidus 
(C) Dehydration 
(D) Acute glomerulonephritis 

10. Specific gravity of urine is decreased in 
(A) Diabetes mellitus 
(B) Acute glomerulonephritis 
(C) Diarrhoea 
(D) Chronic glomerulonephritis

11. Heavy proteinuria occurs in
(A) Acute glomerulonephritis
(B) Acute pyelonephritis
(C) Nephrosclerosis
(D) Nephrotic syndrome 

12. Mucopolysaccharides are 
(A) Hamopolysaccharides 
(B) Hetropolysaccharides 
(C) Proteins 
(D) Amino acids 

13. Bence-Jones protein precipitates at 
(A) 20°–40° C 
(B) 40–-60° C 
(C) 60°–80° C 
(D) 80°–100° C 

14. Serum cholesterol is decreased in
(A) Endemic goitre
(B) Thyrotoxicosis
(C) Myxoedema 
(D) Cretinism 

15. The heptose ketose sugar formed as a result of chemical reaction in HMP shunt:
 (A) Sedoheptulose
 (B) Galactoheptose
 (C) Glucoheptose
 (D) Mannoheptose

 16. The general formula for polysaccharide is
(A) (C6H12O6)n
(B) (C6H10O5)n 
(C) (C6H12O5)n
(D) (C6H19O6)n 

17. The number of isomers of glucose is
(A) 4 
(B) 8 
(C) 12 
(D) 16 

18. The epimers of glucose is 
(A) Fructose 
(B) Galactose 
(C) Ribose 
(D) Deoxyribose

 19. The intermediate in hexose monophosphate shunt is 
(A) D-Ribolose 
(B) D-Arobinose 
(C) D-xylose 
(D) D-lyxose 

20. Honey contains the hydrolytic product of 
(A) Lactose 
(B) Maltose 
(C) Inulin 
(D) Starch 

21. On boiling Benedict’s solution is not reduced by 
(A) Sucrose 
(B) Lactose 
(C) Maltose 
(D) Fructose

22. Glycosides are found in many
(A) Vitamins
(B) Drugs
(C) Minerals
(D) Nucleoproteins

23. Galactose on oxidation with conc. HNO3 produces
(A) Gluconic acid
(B) Saccharic acid
(C) Saccharo Lactone
(D) Mucic acid

24. The distinguishing test between monosaccharides and dissaccharides is
(A) Bial’s test
(B) Selwanoff’s test
(C) Barfoed’s test
(D) Hydrolysis test

25. Cellulose is made up of the molecules of
 (A) α-glucose
 (B) β-glucose
 (C) Both of the above
 (D) None of these

 26. Iodine solution produces no color with
(A) Cellulose
(B) Starch 
(C) Dextrin
(D) Glycogen 

27. Glycogen structure includes a branch in between–glucose units:
(A) 6–12 
(B) 8–14 
(C) 6–10 
(D) 12–18 

28. Amylose contains glucose units 
(A) 100–200 
(B) 200–300 
(C) 300–400 
(D) 500–600 

29. Each branch of amylopectin is at an interval of glucose units: 
(A) 14–20 
(B) 24–30 
(C) 34–40
(D) 44–50 

30. N-acetylneuraminic acid is an example of 
 (A) Sialic acid
 (B) Mucic acid
 (C) Glucuronic acid
 (D) Hippuric acid 

31. In place of glucuronic acid chondroitin sulphate B contains 
(A) Gluconic acid 
(B) Gulonic acid
(C) Induronic acid 
(D) Sulphonic acid

 32. Blood group substances consist of
(A) Lactose 
(B) Maltose 
(C) Fructose 
(D) Mucose

33. The component of cartilage and cornea is
 (A) Keratosulphate
 (B) Chondroitin sulphate
 (C) Cadmium sulphate
 (D) Antimony sulphate

34. Benedict’s test is less likely to give weakly positive results with concentrated urine due to the action of
 (A) Urea
 (B) Uric acid
 (C) Ammonium salts
 (D) Phosphates

35. Active transport of sugar is depressed by the agent:
 (A) Oxaloacetate
 (B) Fumarate
 (C) Malonate
 (D) Succinate

 36. The general test for detection of carbohydrates is
 (A) Iodine test
 (B) Molisch test
 (C) Barfoed test 
 (D) Osazone test 

37 Glucose absorption may be decreased in
 (A) Oedema
 (B) Nephritis
 (C) Rickets 
 (D) Osteomalitis

 38. Glycogen synthetase activity is depressed by
 (A) Glucose 
 (B) Insulin 
 (C) Cyclic AMP
 (D) Fructokinase 

39. The branching enzyme acts on the glycogen when the glycogen chain has been lengthened to between glucose units:
(A) 1 and 6 
(B) 2 and 7
(C) 3 and 9 
(D) 6 and 11 

40. Cyclic AMP is formed from ATP by the enzyme adenylate cyclase which is activated by the hormone:
 (A) Insulin 
 (B) Epinephrine 
 (C) Testosterone
 (D) Progesterone 

41. Hexokinase has a high affinity for glucose than
 (A) Fructokinase
 (B) Galactokinase
 (C) Glucokinase
 (D) All of the above

 42. Dihydroxyacetone phosphate and glyceraldehyde-3-phosphate are intercoverted by
 (A) Triose isomerase
 (B) Phosphotriose isomerase
 (C) Diphosphotriose isomerase
 (D) Dihydroxyacetone phosphorylase

43. Citrate is converted to isocitrate by aconitase which contains
(A) Ca++
(B) Fe++
(C) Zn++
(D) Mg++

44. The reaction succinyl COA to succinate requires
(A) CDP
(B) ADP
(C) GDP
(D) NADP+

45. The carrier of the citric acid cycle is
(A) Succinate
(B) Fumarate
(C) Malate
(D) Oxaloacetate

46. UDPG is oxidized to UDP glucuronic acid by UDP dehydrogenase in presence of
(A) FAD+
(B) NAD+
(C) NADP+
(D) ADP+

47. Galactose is phosphorylated by galactokinase to form
(A) Galactose-6-phosphate
(B) Galactose-1, 6 diphosphate
(C) Galactose-1-phosphate
(D) All of these

48. The conversion of alanine to glucose is termed
(A) Glycolysis 
(B) Oxidative decarboxylation
(C) Specific dynamic action
(D) Gluconeogenesis

49. The blood sugar raising action of the hormones of suprarenal cortex is due to
 (A) Gluconeogenesis
 (B) Glycogenolysis
 (C) Glucagon-like activity
 (D) Due to inhibition of glomerular filtration

50. Under anaerobic conditions the glycolysis one mole of glucose yields __ moles of ATP. (A) One
      (B) Two
      (C) Eight
      (D) Thirty