Light Reactions of Photosynthesis · NCERT Biology

What is the primary role of accessory pigments like carotenoids during the light reactions?

  1. Fixing CO2 into glucose in the stroma
  2. Protecting chlorophyll a from photo-oxidation
  3. Splitting water molecules in the thylakoid
  4. Synthesizing ATP directly from ADP
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Correct answer: Protecting chlorophyll a from photo-oxidation

Accessory pigments broaden the spectrum of light absorbed for photosynthesis and transfer that energy to chlorophyll a. They also play a crucial role in protecting chlorophyll a from damage by intense light, known as photo-oxidation.

Difficulty: Medium Question 7 of 20

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