Q36 / 200 · NEET 2023 (All India) · Botany

The reaction centre in PS II has an absorption maxima at

  • A
    780 nm
  • Correct answer
    B
    680 nm
  • C
    700 nm
  • D
    660 nm

Solution

The pigments involved in photochemical reactions are organised into two discrete photochemical light harvesting complexes (LHC) within the Photosystem I (PS I) and Photosystem II (PS II).

  • In PS I, the reaction centre chlorophyll-a has an absorption peak at 700 nm, hence is called P700.
  • In PS II the reaction centre chlorophyll-a has an absorption maxima at 680 nm, and is called P680.

Hence, the correct answer is option: 'B'.

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