4) Examine the diagrams below (from the power point presentation) for bacterial

Question

4) Examine the diagrams below (from the power point presentation) for bacterial cyclic anoxygenic photophosphorylation. The first diagram depicts initial capture of light by antenna pigments and transfer of energy to the reaction center. The second diagram includes these intial steps, and adds the flow of electrons. At what point does electron transport (movement of the electrons to another component) begin? How does this electron transport result in conversion of light energy into usable energy for the cell? 23 center Pigment antea

Explanation / Answer

For cyclic Photosynthesis Photosystem I or P 700 absorbs photons and passes it on to other component molecules like a chlorophyll a molecule called A0 then to phylloquinone and three iron-sulfur centers ( Fx FA and FB ) that form an Electron transport chain linking to ferredoxin.

While Ferrodoxin pases electrons its reduces NADP+ to NADPH. This NADPH enters the calvin cycle where it forms trioses (carbohydrates with three carbons), which is ultimately converted into starch the enrgy storing molecule

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