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Excretory Products and Their Elimination

What is the p...

Question

What is the product of the reaction of citrulline with aspartate in the urea cycle?

A

Arginine

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B

Ornithine

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C

Argininosuccinate

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D

Asparto citrulline

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Solution

The correct option is C Argininosuccinate
Urea synthesis is a five step cyclic process, with five distinctive enzymes. In the third step of the urea cycle, citrulline condenses with the aspartate to form arginosuccinate by the enzyme arginosuccinate synthetase.
So, the correct answer is 'Arginosuccinate synthetase'.

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Similar questions

Q. Which of the following statement/statements are not true according to urea cycle?
I. Two ATP molecules are required for synthesis of carbamoyl phosphate.
II. Products of urea cycle are: 1 molecule of urea, 2 molecules of ADP, 1 molecule each of AMP and fumaric acid.
III. Urea cycle takes place in kidney cells.
IV. Reaction of citrulline and aspartate requires ATP.

Q. Which of these statements are true regarding urea cycle?
1. Fumarate acts as a connecting link between urea cycle and Krebs cycle.2. Urea cycle solely occurs in mitochondria only.3. Citrulline and arginine reacts to form argininosuccinate.4. Ornithine formed in the last reaction is directly excreted along with urea.5. Arginase promotes cleavage of arginine to urea and ornithine.

Q. Which of the following is/are the connecting link between the urea cycle and TCA/Krebs cycle ?
I. Fumarate
II. Ornithine
III. Aspartate
IV. Citrulline

Q. Which of the following steps are ATP dependent in urea cycle?
I. Combination of ammonia and

C O_{2}

II. Conversion of ornithine to citrulline
III. Reaction of citrulline with aspartate
IV. Formation of urea

Q. Which of these are reactants in urea cycle?
(i)

C O_{2}

(ii) Aspartic acid
(iii) Arginine
(iv) Ornithine

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