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Help with the following light-dependent reactions: Noncyclic electron flow and the Calvin Cycle.© BrainMass Inc. brainmass.com March 4, 2021, 7:44 pm ad1c9bdddf
Help with the light-dependent reactions: Non-cyclic electron flow and The Calvin Cycle.
I. Non-cyclic electron flow
The first stage of photosynthesis is called non-cyclic electron flow. Photosynthesis begins when light energy enters what is called a photosystem, a cluster of pigment molecules in the thylakoid which reflect the light until it reaches a particular molecule of the pigment chlorophyll a. The particular photosystem that the light enters is called Photosystem II, and the chlorophyll a is called P680. The light energy is transferred to an electron in the P680 molecule. This high energy electron is released and accepted by a nearby electron acceptor molecule. Also, a water molecule is split into hydrogen ions and an oxygen atom, donating an electron to the P680 molecule to ...
This solution discusses noncyclic electron flow and the Calvin cycle.