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Which of the statements given above is/are correct?
i. Enzymes require cofactors for catalytic activity, and the protein portion is known as the apoenzyme.
ii. Prosthetic groups are loosely associated with the apoenzyme and can be easily removed.
iii. Coenzymes are transiently associated with the apoenzyme and often derived from vitamins.
iv. Metal ions serve as cofactors and are essential for the activity of certain enzymes.
  • a)
    i and ii
  • b)
    iii and iv
  • c)
    i, iii, and iv
  • d)
    ii and iv
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Which of the statements given above is/are correct?i. Enzymes require ...
- Statement i is correct because enzymes do require cofactors to be catalytically active, and the protein part without the cofactor is indeed called the apoenzyme.
- Statement ii is incorrect; prosthetic groups are tightly bound to the apoenzyme, not loosely associated.
- Statement iii is correct because coenzymes are indeed transiently associated with the apoenzyme and are often derived from vitamins, such as NAD from niacin.
- Statement iv is correct as certain enzymes do require metal ions, which are essential for their catalytic activity, forming coordination bonds at the active site.
Thus, the correct combination of statements is i, iii, and iv, corresponding to Option C.
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Which of the statements given above is/are correct?i. Enzymes require cofactors for catalytic activity, and the protein portion is known as the apoenzyme.ii. Prosthetic groups are loosely associated with the apoenzyme and can be easily removed.iii. Coenzymes are transiently associated with the apoenzyme and often derived from vitamins.iv. Metal ions serve as cofactors and are essential for the activity of certain enzymes.a) i and iib) iii and ivc) i, iii, and ivd) ii and ivCorrect answer is option 'C'. Can you explain this answer?
Question Description
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