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Photosynthesis and Respiration

Photosynthesis and Respiration
Which of the following is the reduced form of a temporary electron carrier molecule?

FADH2
NADP+
CO2
ATP

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Photosynthesis and Respiration
If the oxygen is labeled in CO2 and provide this CO2 to a plant, where it is expected to find this labeled oxygen after the plant had undergone photosynthesis?

In the oxygen given off by the plant
In the water used
In the NADPH
In the carbohydrate produced

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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 for cyclic photophosphorylation
electrons needed to reduce P680

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Photosynthesis and Respiration
Hydrogen (electron) acceptor in the light reactions is

NAD+
NADP+
FADH
ADP

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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

cell membrane
none of these
mitochondria
endoplasmic reticulum

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Photosynthesis and Respiration
Electron transport systems play a vital role in

light-dependent reactions
photorespiration
Calvin cycle
all of these

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