Given below are two statements
Statement I: Photorespiration does not occur in $C_{4}$ plants.
Statement II: $C_{4}$ plants possess a mechanism that increases the concentration of ${CO}_{2}$ at the site of the enzyme, RuBisCO.
In light of the above statements, choose the correct answer from the options given below.

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Statement I is incorrect but statement II is correct.

Both statement I and statement II are correct.

Statement I is correct but statement II is incorrect.

Both statement I and statement II are incorrect.

answer is A.

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Detailed Solution

In C4 plants photorespiration does not occur. This is because they have a mechanism that increases the concentration of CO2 at the enzyme site. This takes place when the C4 acid from the mesophyll is broken down in the bundle sheath cells to release CO2 – this results in increasing the intracellular concentration of CO2 . In turn, this ensures that the RuBisCO functions as a carboxylase minimising the oxygenase activity.

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