Photosynthesis

AP Biology· difficulty 2/5

Carotenoids contribute to photosynthesis by

  • A

    Storing chemical energy as carbohydrates and releasing it gradually during the dark reactions of photosynthesis

  • B

    Absorbing wavelengths chlorophyll misses (especially blue-green) and dissipating excess light energy

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  • C

    Catalyzing the splitting of water at PSII and donating extra electrons to the cytochrome complex

  • D

    Replacing chlorophyll molecules in low light conditions and shuttling protons across the thylakoid membrane

Explanation

Carotenoids broaden the absorption spectrum and protect against photo-oxidative damage from excess light.

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