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Question: Answered & Verified by Expert
Three of the following statements about enzymes are correct and one is wrong. Which one is wrong?
BiologyBiomolecules (B)NEETNEET 2010 (Mains)
Options:
  • A Enzymes require optimum $\mathrm{pH}$ for maximal activity
  • B Enzymes are denatured at high temperature but in certain exceptional organisms they are effective even at temperatures $80^{\circ}-90^{\circ} \mathrm{C}$
  • C Enzymes are highly specific
  • D Most enzymes are proteins but some are lipids
Solution:
1324 Upvotes Verified Answer
The correct answer is: Most enzymes are proteins but some are lipids
Enzymes show $\mathrm{pH}$ sensitivity and require an optimum $\mathrm{pH}$ for maximal activity.
Enzymes are thermolabile (heat sensitive) and denatured at high temperatures. However, extremophiles (thermophilic bacteria) are exceptions.
Most of the enzymes are highly specific in their action.
Most enzymes are proteins but exceptionally some are RNA enzymes, eg, ribozymes.

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