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Question

Which of the following statements is correct with reference to enzymes?

A
Apoenzyme = Holoenzyme + Coenzyme
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B
Holoenzyme = Apoenzyme + Coenzyme
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C
Coenzyme = Apoenzyme + Holoenzyme
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D
Holoenzyme = Coenzyme + Co-factor
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Solution

The correct option is B Holoenzyme = Apoenzyme + Coenzyme
Holoenzyme is the active form of the enzyme. It is made of two components called the apoenzyme and co-factor.
  • The protein part of an enzyme is called apoenzyme.
  • The non-protein part is called co-factor. Co-factor may be prosthetic group, co-enzyme and metal ion.
Association of the co-factor with the apoenzyme is necessary for the proper functionality of the enzyme.

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