Creatine is formed metabolically from______________?
Correct answer: A. Arginine
- A. Arginine
- B. Tryptophan
- C. Phenylalanine
- D. Histidine
Explanation
Creatine synthesis uses arginine and glycine in the kidney or pancreas, followed by methylation using methionine-derived SAM in the liver. Among the listed choices, arginine is the correct precursor.
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