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Photosynthesis and Respiration

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

cell membrane
endoplasmic reticulum
mitochondria
none of these

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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

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

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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 NADH
electrons needed to reduce P680
electrons needed for cyclic photophosphorylation

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

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

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Photosynthesis and Respiration
Oxidative phosphorylation is to respiration as __________ is to photosynthesis

electron transport chain
carbon fixation
reduction of NADPH
light capture by chlorophyll

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

glycolysis
fermentation
anaerobic respiration
Krebs cycle

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