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Photosynthesis and Respiration

Photosynthesis and Respiration
Electron transport systems play a vital role in

all of these
Calvin cycle
light-dependent reactions
photorespiration

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Photosynthesis and Respiration
Where do the protons come from that make up the proton gradient used in the light reactions of photosynthesis?

ATP
H2O
NADPH
Glucose

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Photosynthesis and Respiration
In cells having organelles, the steps of the Krebs cycle and the electron transport system occur in the

mitochondria
endoplasmic reticulum
cell membrane
none of these

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

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

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Photosynthesis and Respiration
What is the maximum absorption wavelength for photosystem I in green plants?

700 nm
550 nm
600 nm
750 nm

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

water
chlorophyll pigments
adenosine triphosphate (ATP)
carbon dioxide

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