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Photosynthesis and Respiration

Photosynthesis and Respiration
In oxygenic photosynthesis, the electron donor is

water
NADPH
NADH
oxygen

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Photosynthesis and Respiration
In noncyclic photophosphorylation, the ultimate acceptor of electrons that have been produced from the splitting of water is

chlorophyll a
chlorophyll b
carbon dioxide
NADP+

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Photosynthesis and Respiration
Assume the combined processes of photosynthesis and cellular respiration, the electrons that start as part of H2O at the beginning of the light reactions end up attaching to

pyruvate to make ethanol
NADPH to make new glucose
electron transport carriers to make O2
O2 to make new H2O

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

oxygen
glucose
ATP
NADPH

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Photosynthesis and Respiration
The breakdown of glucose occurs by the process known as

fermentation
glycolysis
anaerobic respiration
Krebs cycle

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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

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

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