How might a plant cope with the fact that the Calvin cycle uses more ATP than NADPH,yet produces roughly the same amount of both energy intermediates in photosystems I and II?
A) Electron flow rate can be increased,increasing both ATP and NADPH production.
B) Plants often increase the amount of NADP reductase,thereby increasing NADPH production to match ATP output.
C) Photosynthesis can revert from a noncyclic to cyclic electron flow,producing more ATP than NADPH.
D) Increase the electrochemical gradient for H+ across the thylakoid membrane,producing more ATP but not NADPH.
E) More pigment can be rapidly created for greater photosynthetic capacity,producing equal amounts of ATP and NADPH.
Correct Answer:
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Q32: When NADP+
A)accepts electrons in the light reaction,it
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Q34: The primary advantage C4 plants have over
Q35: In the reaction,6CO2 + 6H2O
Q36: A thylakoid that is placed in a
Q38: If a C3 plant that normally closes
Q39: Where does the Calvin cycle occur?
A)chloroplast inner
Q40: The purpose of the light reaction is
Q41: A C4 plant minimizes photorespiration by
A)stomata that
Q42: In the Calvin Cycle,CO2 binds to
A)photosystem II
B)water
C)NADPH
D)glucose
E)ribulose
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