Multiple choice

Match the entries of Group - I with those in Group - II.

 
Group - I
Group - II
P. Histidine ammonia-lyase 1. Estrogen biosynthesis
Q. Adrenodoxin reductase 2. Catalyse ammonia and urocanic acid formation
R. Aromatase 3. Oxidation of uric acid
S. Urate oxidase 4. First electron transfer of mitochondrial P450

  1. P - 2, Q - 4, R - 1, S - 3

  2. P - 4, Q - 2, R - 1, S - 3

  3. P - 3, Q - 2, R - 1, S - 4

  4. P - 4, Q - 3, R - 2, S - 1

  5. P - 1, Q - 4, R - 2, S - 3
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A Correct answer
Explanation

The enzyme histidine ammonia-lyase converts histidine into ammonia and urocanic acid. Adrenodoxin reductase is a mitochondrial flavoprotein. The enzyme functions as the first electron transfer protein of mitochondrial P450 systems. Aromatase, also called estrogen synthetase, is an enzyme responsible for a key step in the biosynthesis of estrogens. The enzyme urate oxidase (UO), catalyses the oxidation of uric acid to 5-hydroxyisourate. Hence, the correct sequence of codes is P - 2, Q - 4, R - 1, S - 3.

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