Biochemistry - Mock Test 79

Question 781

Pancreatic juice contains the precursors of all of the following except?

A) Trypsin B) Chymotrypsin C) Carboxypeptidase D) Aminopeptidase

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Question 782

All the following statements about pepsin are correct except?

A) It is smaller than pepsinogen B) It is formed by the action of HCl on its precursor C) Its optimum pH is 1.0–2.0 D) It hydrolyses the C-terminal and N-terminal peptide bonds of proteins

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Question 783

DOPA is an intermediate in the synthesis of?

A) Thyroid hormones B) Catecholamines C) Melanin D) Catecholamines and melanin

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Question 784

Histamine is formed from histidine by?

A) Deamination B) Dehydrogenation C) Decarboxylation D) Carboxylation

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Question 785

Glycine is not required for the formation of?

A) Taurocholic acid B) Creatine C) Purines D) Pyrimidines

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Question 786

All the following statements about albinism are correct except?

A) Tyrosine hydroxylase (tyrosinase) is absent or deficient in melanocytes B) Skin is hypopigmented C) It results in mental retardation D) Eyes are hypopigmented

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Question 787

The defective enzyme in histidinemia is?

A) Histidine carboxylase B) Histidine decarboxylase C) Histidase D) Histidine oxidase

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Question 788

Cystinuria results from inability to?

A) Metabolise cysteine B) Convert cystine into cysteine C) Incorporate cysteine into proteins D) Reabsorb cystine in renal tubules

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Question 789

Maple syrup urine diseases is an inborn error of metabolism of?

A) Sulphur-containing amino acids B) Aromatic amino acids C) Branched chain amino acids D) Dicarboxylic amino acids

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Question 790

Daily excretion of nitrogen by an adult man is about?

A) 15–20 mg B) 1.5–2 gm C) 5–10 gm D) 15–20 gm

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