biochemistry MCQs – Page 3

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

biochemistry Mcqs

41. In TCA cycle, citrate is converted in to after losing a molecule of H2O_____________?
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A. Glutarate

B. Isocitrate

C. Cisaconitate

D. Oxalocetate

42. The enzyme that is specifically increased in obstructive jaundice is_____________?
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A. Glutamate oxaloacetate transaminase

B. Alkaline phosphaase

C. Acid phosphatase

D. Glutamate pyruvate transaminase

43. Which of the following is a non-reducing sugar____________?
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A. Lactose

B. Glucose

C. Maltose

D. Sucrose

44. Which one of the following is the correct sequential order in which the given enzymes of krebs cycle are formed after a molecule of acetyl CoA______________?
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A. Citrate, Oxalocetate, Ketoglutarate

B. Citrate, Ketoglutarate, Oxalocetate

C. Oxalocetate, Ketoglutarate, Citrate

D. Ketoglutarate, Oxalocetate, Citrate

45. Which of the following enzymes use NADP as coenzyme ________________?
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A. Lactate dehydrogenase

B. Beta hydroxy acyl CoA dehydrogenase

C. Glyceraldehyde 3 phosphate dehydrogenase

D. Glucose 6-Phosphate dehydrogenase

46. Adrenaline acts on which enzyme in glycogenolysis ?
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A. Glucose diphosphatase

B. Hexokinase

C. Phosphorylase

D. Glucokinase

47. Key glycolytic enzymes_____________?
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A. Phosphofructokinase

B. Glucose 1,6 diphosphatase

C. Pyruvate kinase

D. Hexokinase

48. The rate of absorption of sugars by the small intestine is highest for_______________?
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A. Hexoses

B. Polysaccharides

C. Disaccharides

D. Pentoses

49. The activity of the following enzyme is affected by biotin deficiency____________?
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A. Carboxylase

B. Transketolase

C. Dehydrogenase

D. Oxidase

50. Which of the following is a function of the golgi apparatus ?
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A. Modification of proteins

B. m RNA synthesis

C. Protein storage

D. t RNA synthesis

51. Galactosemia commonly is due to deficiency of_____________?
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A. Glucose 1 phosphatase

B. Galactose 1 phosphatase uridyl transferase

C. Glucose 6 phosphatase

D. Galactose 1 phosphatase

52. Which of the following is correctly matched ?
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A. Malate to oxaloacetate -1 ATP is formed

B. Succinate to furmarate -1 ATP is formed

C. Isocitrate to oxalo succinate -1 ATP is formed

D. Succinyl CoA to succinate -1 ATP is formed

53. Which of the following is not a product of HMP shunt_____________?
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A. NADPH

B. D sedoheptulose 5 phosphate

C. D glyceraldehyde 3 phosphate

D. D fructose 6 phosphate

54. Most importent compansatory mechanism in metabolic acidosis______________?
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A. Increased urinary phosphates

B. Increased NH3 excretion by kidneys

C. Hyperventilation

D. Increased HCO3 Production

55. Hexokinase is a______________?
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A. Reductase

B. Oxidase

C. Oxidoreductase

D. Transferase

56. Which of these organelle functions as the digestive system of the cell ?
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A. Mitochondria

B. Lysomes

C. Rough endoplasmic reticulum

D. Golgi apparatus

57. Bile acids are formed from__________?
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A. Lipoproteins

B. Bilirubin

C. Aminoacids

D. Cholesterol

58. The most common enzyme deficiency in man is___________?
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A. Glucose 6 phosphate dehydrogenase

B. Hexokinase

C. Glucose 1,6 diphosphatase

D. Glucose 6 phosphatase

59. Enzyme that catalyses the transfer of a molecule group from one molecule to another is_____________?
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A. LIpases

B. Oxidases

C. Transferases

D. Peptidases

60. Step in HMP pathway requiring TPP_____________?
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A. G6 PD

B. 6 phosphogluconate dehydrogenase

C. Transaldolase

D. Transketolase

Showing 41 to 60 of 448 mcqs