Photosynthesis

AP Biology· difficulty 3/5

Photosystem RC Antenna pigments funnel energy → RC

What is the function of the antenna (light-harvesting) pigments?

  • A

    Capture photons over a wide spectrum and transfer excitation energy to the reaction-center chlorophyll

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  • B

    Split water to release O2 directly

  • C

    Pump H+ into the lumen

  • D

    Reduce NADP+ to NADPH

Explanation

Antenna pigments harvest light at many wavelengths and pass energy by resonance to the reaction-center pair, which performs the actual photochemistry.

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