On a molecular level, how might global warming affect carbon dioxide fixation? O

Question

On a molecular level, how might global warming affect carbon dioxide fixation? O Ribusco's carboxylase activity O Ribusco's oxygenase activity increases with an increase in temperature, requiring more plants to use the C4 pathway O Rubisco's oxygenase activity decreases with an increase in temperature, requiring more plants to use the C3 cycle. O Carbon dioxide, being a denser gas than oxygen, will cause more plants to sequester CO2 in mesophyll cells. O Increase in temperatures leads to increase in water loss in leafy plants compared to succulents, thus, the light reactions y increases with an increase in temperature, requiring more plants to use the C3 pathway are inhibited

Explanation / Answer

The correct option will be "RuBisCo oxygenated activity increases with the increase in temperature, requiring more plants to use c4 pathway."

Reasons:

(i) With the rise in temperature, CO2 solubility will decrease which result in increase in RuBisCo oxygenase activity because O2 solubility will be higher than CO2.

(ii) C4 plants are mostly found in warm, dry and high temperature environment which makes them suitable for survival. They use PEPcarboxylase to capture more CO2 in mesophyll cells.

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