The addition of an inorganic phosphate to ADP using energy originally from light to make ATP.
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Why is is called non-cyclic?
the electron lost at the start does not return, but a new electron replaces it
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What happens when light reaches Photosystem II and I?
An excited electron leaves the photosystem to a higher energy level
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How is the electron lost from Photosystem II replaced?
Water is broken down using dehydrogenase enzymes into 1/2O2 + 2H+ + 2e- which are used to replace the electrons lost. This is called photolysis
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What happens to the electron lost from photosystem II?
It moves down energy levels by moving between electron carriers until it replaces the electron lost from photosystem I when light was absorbed, creating chemiosmosis
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What is chemiosmosis?
Electrons move down electron carriers, moves H+ ions through membrane into cell, gradient increases until larger than outside cell, H+ ions move back through ATPase protein channels, making ATP as they do so
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What happens to the 2H+ from photolysis?
NADP, a reductase enzyme, becomes reduced NADP as it bonds to hydrogen and the electrons released from photosystem I
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What are the products of Photophosphorylation?
O2, ATP and reduced NADP
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What happens to the electron from photosystem I?
after it reaches a high energy level, it moves down energy levels by electron carriers again until it is bonded to NADP to reduce the enzyme
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Other cards in this set
Card 2
Front
Why is is called non-cyclic?
Back
the electron lost at the start does not return, but a new electron replaces it
Card 3
Front
What happens when light reaches Photosystem II and I?
Back
Card 4
Front
How is the electron lost from Photosystem II replaced?
Back
Card 5
Front
What happens to the electron lost from photosystem II?
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