NEET 2010 · Class 11

Biomolecules

Three of the following statements about enzymes are correct and one is wrong. Which one is wrong?

  1. (A)Enzymes require optimum pH for maximal activity.
  2. (B)Enzymes are denatured at high temperature but in certain exceptional organisms they are effective even at temperatures 80°C - 90°C
  3. (C)Enzymes are highly specific.
  4. (D)Most enzymes are proteins but some are lipids.

The NCERT line that answers it

Verbatim line

Almost all enzymes are proteins.

Chapter
Biomolecules
Section
9.8 ENZYMES
Page
8
Words matched
14 of 14

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

5, emb=1.0, combined=0.8). Verified: high — The span 'Almost all enzymes are proteins' directly contradicts option D's claim that some enzymes are lipids, establishing that enzymes are proteins (with rare exceptions like ribozymes being nucleic acids, not lipids), which is the specific fact needed to identify option D as incorrect.

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Question text is reproduced from the published NEET 2010 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.