Biotin is required for the activity of_____________?
Correct answer: A. Pyruvate carboxylase
- A. Pyruvate carboxylase
- B. Lactate dehydrogenase
- C. Succinate thiokinase
- D. Phosphohexose isomerase
Explanation
Biotin is the covalently bound cofactor for carboxylases and carries activated carbon dioxide during carboxylation. Pyruvate carboxylase therefore requires biotin, unlike the other listed enzymes.
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