NEET 2023 · Class 11

Photosynthesis in Higher Plants

The reaction centre in PS II has an absorption maxima at

  1. (A)700 nm
  2. (B)660 nm
  3. (C)780 nm
  4. (D)680 nm

The NCERT line that answers it

Verbatim line

In photosystem II the reaction centre chlorophyll *a* absorbs 680 nm wavelength of red light causing electrons to become excited and jump into an orbit farther from the atomic nucleus.

Chapter
Photosynthesis in Higher Plants
Section
11.6 THE ELECTRON TRANSPORT
Page
7
Words matched
30 of 30

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 explicitly states 'the reaction centre chlorophyll a absorbs 680 nm wavelength of red light' for photosystem II, which directly matches the correct answer and distinguishes it from the other options.

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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.

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Question text is reproduced from the published NEET 2023 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.