Multiple Choice
If the concentrations of CO2 and O2 were equal in the atmosphere, rubisco would favor CO2 over O2 as a substrate by about 2000:1 at 25°C. Why, in today's atmosphere (and at 25°C) , is the photosynthesis/photorespiration ratio of C3 plants only about 4:1?
A) O2 is much more abundant than CO2 in today's atmosphere.
B) Rubiscos that are more selective for CO2 are slower.
C) O2 is continually produced in the leaves of C4 plants.
D) RuBP reacts readily with O2.
Correct Answer:
Verified
Correct Answer:
Verified
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