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Photosynthesis and Respiration

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

ribose tri phosphate
ribulose phosphate
3-phosphoglyceric acid
ribulose diphosphate

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Photosynthesis and Respiration
The cytochrome c oxidase complex

donates four electrons to O2
all of these
accepts electrons from cyt c
pumps protons out of the matrix space

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Photosynthesis and Respiration
The end products of noncyclic photophosphorylation are

O2, ATP and NADPH
carbon dioxide, ATP and water
water, ADP and NADP+
carbon dioxide, PGAL (phosphoglyceraldehyde), and H2

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Photosynthesis and Respiration
NADP+ is reduced to NADPH during

none of these
calvin cylcle
light dependent reactions
photorespiration

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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

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

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Photosynthesis and Respiration
In the initial step of photosynthesis, sunlight energizes the electron pair of

water
carbon dioxide
adenosine triphosphate (ATP)
chlorophyll pigments

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