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Photosynthesis and Respiration

Photosynthesis and Respiration
The electrons that are released by the splitting of water during photosynthesis ultimately end up in

ATP
O2
NADPH
rubisco

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Photosynthesis and Respiration
The manufacture of ATP in both photosynthesis and respiration is made possible by

All of these
the existence of a proton gradient across specific membranes
energy from the movement of electrons
the action of ATP synthase

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Photosynthesis and Respiration
In oxygenic photosynthesis, water is split in order to provide the

O2 needed for the dark reactions
electrons needed to reduce P680
electrons needed for cyclic photophosphorylation
electrons needed to reduce NADH

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Photosynthesis and Respiration
The rate of photorespiration in most plants increases at.higher temperatures. Some plants have evolved a somewhat round-about system to deal with this problem. This series of reactions is called

Calvin cycle
ETS (electron transfer system in light reactions
C4 pathway
Photosystem II

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Photosynthesis and Respiration
The followings are the products of the light reactions of photosynthesis except

NADPH
glucose
oxygen
ATP

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Photosynthesis and Respiration
In the Calvin cycle, carbon dioxide is fixed in a reaction with the

ribulose phosphate
ribulose diphosphate
3-phosphoglyceric acid
ribose tri phosphate

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