Question

In ornithine cycle, enzyme arginase breaks down arginine into

• A. Citrulline and ammonia
• B. Ornithine and ammonia
• C. Ornithine and urea
• D. Citrulline and urea

Answer 1

The correct option is C Ornithine and urea

Urea is a waste product that liver produces and kidneys secrete. Arginine is a necessary component of the urea cycle, which is the process your body uses to make urea. To start this cycle, the enzyme arginase breaks down arginine to form urea and ornithine, another amino acid. The ornithine then reacts with other chemicals in the liver to produce more arginine, and the cycle begins again.