NEET 1991 · Class 11

Biological Classification

Name the organisms which do not derive energy directly or indirectly from sun.

  1. (A)Chemosynthetic bacteria
  2. (B)Pathogenic bacteria
  3. (C)Symbiotic bacteria
  4. (D)Mould

The NCERT line that answers it

Verbatim line

**Chemosynthetic autotrophic** bacteria oxidise various inorganic substances such as nitrates, nitrites and ammonia and use the released energy for their ATP production.

Chapter
Biological Classification
Section
2.1.2 Eubacteria
Page
3
Words matched
22 of 22

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

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states that chemosynthetic autotrophic bacteria oxidize inorganic substances and use the released energy for ATP production, which directly indicates they do not derive energy from sunlight.

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 1991 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.