KROK 1 2021 – Question 10 · KROK (Medicine) · Biological Chemistry
When a dentist applied hydrogen peroxide to the patient’s oral mucosa, it started frothing excessively. What enzyme breaks down hydrogen peroxide?
- A. Methemoglobin reductase
- B. Catalase
- C. Acetyltransferase
- D. Glucose-6-phosphate dehydrogenase
- E. Cholinesterase
Hint
Hydrogen peroxide is split into oxygen gas and water by a haem-containing peroxisomal enzyme; the bubbles seen on the mucosa are that gas.
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