NEET 1997 · Class 11

Respiration in Plants

The end product of fermentation are

  1. (A)O2 and C2H5OH
  2. (B)CO2 and acetaldehyde
  3. (C)CO2 and O2
  4. (D)CO2 and C2H5OH

The NCERT line that answers it

Verbatim line

In fermentation, say by yeast, the incomplete oxidation of glucose is achieved under anaerobic conditions by sets of reactions where pyruvic acid is converted to $\text{CO}_2$ and ethanol.

Chapter
Respiration in Plants
Section
12.3 FERMENTATION
Page
4
Words matched
25 of 28

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

How this line gives the answer

6667, emb=1.0, combined=0.8667). Verified: high — The span explicitly states that in fermentation by yeast, pyruvic acid is converted to CO₂ and ethanol (C₂H₅OH), which directly matches option D and distinguishes it from the incorrect options.

We did this for 1,565 questions.

Every one traced to the exact sentence in NCERT that answers it, including 90% of the 2026 paper. Sit a mock on the real NEET 2027 computer interface and every mark you drop comes back with its line attached.

Take the free 5-minute checkMore from this chapter

Question text is reproduced from the published NEET 1997 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.