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Sagot :
To absorb light energy, photons (from light) to be excited and pumped with energy.
The main problem is that a single photon does not have enough energy to pump an electron in a single motion. They consequently employ two distinct photosystems to raise the electrons into higher energy states by means of two photons (see figure). After reaching the main electron acceptor, the excited electron is sent along the electron transport chain, where it is converted from NADP+ to NADPH, storing the energy of the excited electron.
LEARN MORE ABOUT photosystems HERE :
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Which of the answer choices is an advantage of having two slightly different photosystems in the chloroplasts? a) Cells are able to use light energy at twice the maximum efficiency predicted for cells with a single photosystem. b) The electrons can be elevated to a higher energy level than is possible with a single photosystem. c) Twice as many electrons can be excited by a given amount of light energy. d) Cells are able to use both blue and green wavelengths of light for photosynthesis.
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