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Isozymes (isoenzymes) are enzymes which

  • A.have same structural forms
  • B.have different structural forms but identical catalytic properties
  • C.catalyses oxidation reactions
  • D.none of these

Answer: B

Correct answer: have different structural forms but identical catalytic properties

Isozymes are different molecular forms of an enzyme catalysing the same reaction. They differ in amino acid sequence and often in kinetic detail - which is what lets the same reaction be tuned differently in different tissues - but the reaction itself is identical, and that is what makes them isozymes rather than separate enzymes.

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