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Which of the following enzymes is responsible for the metabolism of medications and detoxifications?

  • A.Cytochrome F
  • B.Cytochrome D
  • C.Cytochrome P450
  • D.Cytochrome b

Answer: C

The enzyme family is Cytochrome P450.

Cytochrome P450 enzymes, found mainly in the liver, oxidise many drugs and toxins so that they can be removed from the body.

Cytochrome F, D and b are components of electron-transport chains in photosynthesis or respiration, not the main drug-metabolising enzymes.

These enzymes, a large family of haem proteins, are found mostly in the liver and are named after their absorption peak at 450 nm. They help to metabolise a wide range of drugs and toxins. The other cytochromes named work in electron transport in cells and do not do this job.

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