Which of the following is correct about urea cycle ? (1) Urea cycle takes place in the liver cells (2) Urea cycle involves the union of two molecules of ammonia and a molecule of carbon dioxide (3) Urea is produced by enzyme arginase (4) Three molecules of ammonia enter ornithine cycle

Question

Which of the following is correct about urea cycle ? (1) Urea cycle takes place in the liver cells (2) Urea cycle involves the union of two molecules of ammonia and a molecule of carbon dioxide (3) Urea is produced by enzyme arginase (4) Three molecules of ammonia enter ornithine cycle (A) 1, 2 and 3 are correct (B) 1 and 2 are correct (C) 2 and 4 are correct (D) 1 and 3 are correct

Tardigrade Admin · Accepted Answer

Urea cycle or ornithine cycle or Krebs Henseliet cycle removes two waste products

(N H_{3}

and

C O_{2}

) from the blood in liver cells. It involves the union of two molecules of ammonia and a molecule of carbon dioxide and synthesis of urea. All the steps of this cycle are enzymatic and can be visualized as:

The enzymes involved in step

1, 2, 3

and

4

respectively are ornithine transcarbanylase, argino succinate synthetase, arginine synthetase and arginase.

Q. Which of the following is correct about urea cycle ? (1) Urea cycle takes place in the liver cells (2) Urea cycle involves the union of two molecules of ammonia and a molecule of carbon dioxide (3) Urea is produced by enzyme arginase (4) Three molecules of ammonia enter ornithine cycle

1, 2 and 3 are correct

1 and 2 are correct

2 and 4 are correct

1 and 3 are correct

Q. Which of the following is correct about urea cycle ?
(1) Urea cycle takes place in the liver cells
(2) Urea cycle involves the union of two molecules of ammonia and a molecule of carbon dioxide
(3) Urea is produced by enzyme arginase
(4) Three molecules of ammonia enter ornithine cycle