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A-Level Biology OCR A

Detoxification Broken Forming Describe Examples Liver Hydrogen Peroxide

The liver detoxifies harmful substances like hydrogen peroxide and ethanol through enzymatic processes.

The liver detoxifies hydrogen peroxide using catalase and breaks down ethanol using alcohol dehydrogenase, converting it to ethanal and then ethanoate.

Front Describe two examples of detoxification by the liver.
Back Detoxification examples:
  • Hydrogen peroxide is broken down by catalase, forming oxygen and water
  • Ethanol is broken down by alcohol dehydrogenase, forming ethanal which is converted to ethanoate - used to build up fatty acids or in cellular respiration

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