Multiple choice

Which of the following is a glucogenic amino acid but not ketogenic?

  1. Arginine

  2. Tyrosine

  3. Tryptophan

  4. Isoleucine
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A Correct answer
Explanation

Arginine is purely glucogenic - it can only be converted to glucose via gluconeogenic pathways. Tyrosine and tryptophan are both glucogenic and ketogenic (can form ketone bodies). Isoleucine is also both glucogenic and ketogenic.

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