Question

Which of the following amino acids play important role in ornithine cycle ?

• A. Citrubline, glycine
• B. Ornithine, citrulline
• C. Glycine, methionine
• D. Arginine, methionine

Answer 1

The correct option is B Ornithine, citrulline

Urea synthesis is a five-step cyclic process, with five distinct enzymes. The urea cycle is also called as Ornithine cycle. In the second step of Ornithine cycle, Citrulline(Intermediate product) is synthesized from carbamoyl phosphate and ornithine by ornithine transcarbamoylase. Hence the amino acids which play important role in ornithine cycle are Ornithine and citrulline.

So, the correct answer is 'Option B'.