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Which of the following is NOT a function of accessory pigments?

  • (a) protecting chlorophyll a from photo-oxidation Your answer
  • (b) absorbing a wider range of wavelengths Your answer
  • (c) acting as the primary electron donor of the reaction centre Correct
  • (d) passing the absorbed energy to chlorophyll a Your answer
Your answer: Correct answer: (c)
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Explanation

Why (c) is correct

Accessory pigments do not act as the primary electron donor; that role belongs to the reaction-centre chlorophyll a. The other options are functions of accessory pigments.

Why the other options are wrong

  • (a) · your answer True: they protect chlorophyll a from photo-oxidation.
  • (b) · your answer True: they absorb wavelengths that chlorophyll a absorbs poorly.
  • (d) · your answer True: they pass absorbed energy to chlorophyll a.
NCERT point: Only chlorophyll a forms the reaction centres.
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