Cyanide Poisons Mitochondria by Blocking the Final Step in the Electron

question 62

Multiple Choice

Cyanide poisons mitochondria by blocking the final step in the electron transport chain. Human red blood cells placed in an isotonic solution containing cyanide are likely to

• A) retain the normal cell shape, but the mitochondria will be poisoned.
• B) lyse as the cyanide concentration increases inside the cell.
• C) switch to anaerobic metabolism.
• D) become unable to carry oxygen.
• E) be unaffected.

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