biochemistry MCQs – Page 9

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

biochemistry Mcqs
161. Sources of the nucleotide portion of NAD include__________________?
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A. Tryptophan

B. N-methyl nicotinamide

C. Riboflavin

D. PRPP

162. Collagen formation is affected in deficiency of_____________?
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A. Vit D

B. Vit A

C. Vit B2

D. Vit C
163. On complete hydrolysis of DNA we will get all the following except______________?
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A. Deoxy pentose sugar

B. Phosphoric acid

C. Purine bases

D. Adenosine
164. Major source of ammonia in the kidney is___________?
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A. Aspartate

B. Glutamate

C. Glutamine

D. Urea Aspartate

165. Vitamin C effects_________________?
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A. Maturation of procollagen

B. Formation of osteoid matrix

C. Calcification of osteoid

D. Both A and B
166. The nitrogen content in 50 gm of a typical dietary protein is most likely to be_____________?
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A. 16 gm

B. 8 gm

C. 5 gm

D. 10 gm

167. The major lipids that make up the cell membrane are_______________?
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A. Triglycerides

B. Phospholipids

C. Fatty acids

D. Sphingomyelins

168. In Hartnups disease _______ is excreted in the urine?
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A. Phenylalanine

B. Tryptophan

C. Ornithine

D. Glutamine

169. The amino acid from which niacin synthesized is_______________?
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A. Threonine

B. Tryptophan

C. Tyrosine

D. Histidine

170. The precursor of cholesterol synthesis is________________?
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A. Pyruvate

B. Acetyl CoA

C. Oxalo acetic acid

D. Acetic acid

171. Ascorbic acid_____________?
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A. Is requirement for lysyl oxidase

B. Is harmless in high doses

C. Is a reducing agent

D. Decrease iron absorption

172. Proteins are absorbed from GIT as_____________?
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A. Amino acids

B. All of the above

C. Peptides

D. Peptones

173. Key enzyme in urea synthesis is____________?
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A. Arginase

B. Ornithine

C. Carbamyl synthetase

D. Urease

174. Pernicious anaemia occurs in___________?
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A. Vit C deficiency

B. Vit D deficiency

C. Vit B1 deficiency

D. Vit B12 deficiency
175. Which of the following is not a ketone body______________?
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A. Acetocetate

B. Acetone

C. Acetic acid

D. Beta hydroxybutyric acid

176. Xerophthalmia is caused by_______________?
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A. Vitamin K deficiency

B. Vitamin D deficiency

C. Vitamin A deficiency

D. Vitamin C deficiency

177. Which of the following is the poorest source of vitamin C ?
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A. Radish

B. Cabbage

C. Guava

D. Milk
178. The number of essential amino acid are______________?
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A. 12

B. 8

C. 16

D. 6

179. All are derived of cholesterol except________________?
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A. Glycocholic acid

B. Cholecystokinin

C. Chenodeoxy cholic acid

D. Testosterone

180. Lipid is required in the average diet because it________________?
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A. is necessary for storage of carbohydrates

B. Provides essential fatty acid

C. aids in absorption of carbohydrates

D. has a high caloric value