KROK 1 2015 – Question 14 · KROK (Medicine) · Biological Chemistry

It has been found out that one of a pesticide components is sodium arsenate that blocks lipoic acid. Which enzyme activity is impaired by this pesticide?

  1. A. Glutathione peroxidase
  2. B. Pyruvate dehydrogenase complex
  3. C. Methemoglobin reductase
  4. D. Glutathione reductase
  5. E. Microsomal oxidation
Hint

Think about which of the listed enzymatic systems depends on lipoic acid as a cofactor for its activity.

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