Question

The enzyme RuBiSCO has
1) more affinity for CO2, than for O2
2) more affinity for O2, than for CO2
3) equal affinity for both
4) more affinity for sugars, than for CO2

Answer 1

More affinity for CO2 than O2 (around 80x more)

Explanation:

RuBiSCO has an affinity for carbon dioxide that is 80 times higher than its affinity for oxygen. However, the relatively low ratio of CO2 to O2 of mesophyll fluids in contact with air (0.04) means that, in a typical plant, the Calvin cycle only occurs about three times faster than photorespiration

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Answer 2

Answer:

1) the more affinity CO²,than for O² and electron affinity defined asa when energy is liberated when an atom is added to its neutrals gases atom