1
Question
The exceptional difference between C3 and C4 plants is exhibited by phenomenon
The exceptional difference between C3 and C4 plants is exhibited by phenomenon
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Solution
The correct option is B Photorespiration
In C3 plants, CO2 is pumped directly into the Calvin cycle, leaving rubisco exposed to O2. Rubisco in a C3 will take up O2 rather than CO2 to undergo photorespiration. Photorespiration occurs under low concentrations of CO2 and high concentrations of O2. C4 plants capture carbon dioxide in their mesophyll cells forming oxaloacetate. This oxaloacetate is then converted to malate and is transported into the bundle sheath cells, where oxygen concentration is low to avoid photorespiration.
Photosynthesis and transpiration occurs in both C3 and C4 plants. Crassulacean metabolism does not occur in both C3 and C4 plants.
So, the correct answer is option B.
In C3 plants, CO2 is pumped directly into the Calvin cycle, leaving rubisco exposed to O2. Rubisco in a C3 will take up O2 rather than CO2 to undergo photorespiration. Photorespiration occurs under low concentrations of CO2 and high concentrations of O2. C4 plants capture carbon dioxide in their mesophyll cells forming oxaloacetate. This oxaloacetate is then converted to malate and is transported into the bundle sheath cells, where oxygen concentration is low to avoid photorespiration.
Photosynthesis and transpiration occurs in both C3 and C4 plants. Crassulacean metabolism does not occur in both C3 and C4 plants.
So, the correct answer is option B.
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