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and Energy

Module 3: Photosynthesis

Photosynthesis is a process where energy and CO2 is converted in to O2. Thought to be a process
first occurring in some prokaryotes. And can sometimes refer to as the most important biochemical
process since nearly all life on earth depends on it. The…

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into special structures called photosystems, which allow maximum absorption of light. Proteins
embedded in the grana hold the photosynthetic pigment in place. Stroma contains enzymes which
are needed to catalyse reactions. Chloroplasts contain genetic material in the cytoplasm's DNA which
are used to make some proteins they need for photosynthesis.…

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Cyclic photophosphorylation

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This only uses photosystem 1 (P ) exited electrons

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pass through electron acceptor and into the chlorophyll molecule from which it was lost. Small amount
of ATP are made. This may be used in the light independent reaction or the guard cells.

Non-cyclic photophosphorylation
Involves PS1 and PS2

1. Light hits PS2 and excites a pair of electrons that…

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