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Photosynthesis and Respiration

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

chlorophyll pigments
water
carbon dioxide
adenosine triphosphate (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 carbohydrate produced
In the NADPH
In the oxygen given off by the plant
In the water used

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Photosynthesis and Respiration
The end products of noncyclic photophosphorylation are

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

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Photosynthesis and Respiration
The vast majority of the molecules that act as energy carriers to power cellular activities are made in

the Golgi apparatus
the mitochondria and chloroplasts
the cytosol
the nucleus

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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
NADPH
H2O
Glucose

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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
O2 to make new H2O
electron transport carriers to make O2

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