Ornithine Serves Three Metabolically Important Roles but Is Not Found

question 9

Multiple Choice

Ornithine serves three metabolically important roles but is not found in proteins. Which of the following statements about ornithine is not true?

• A) It is a precursor in the synthesis of citrulline.
• B) It is an intermediate in the urea cycle.
• C) It is a precursor in the synthesis of arginine.
• D) It is biosynthesized from glutamine.
• E) It is a product of arginine hydrolysis.

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