Assertion: In C4 plants, photorespiration does not occur. Reason: C4 plants have a mechanism that increases the concentration of CO2 at the enzyme site.

Question

Assertion: In C4 plants, photorespiration does not occur. Reason: C4 plants have a mechanism that increases the concentration of CO2 at the enzyme site. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

In C4 plants photorespiration does not occur 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. This ensures that the RuBisCO functions as a carboxylase, thus, minimising the oxygenase activity.

Q. Assertion: In C4​ plants, photorespiration does not occur. Reason : C4​ plants have a mechanism that increases the concentration of CO2​ at the enzyme site.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

Q. Assertion: In $C_{4}$ plants, photorespiration does not occur.
Reason : $C_{4}$ plants have a mechanism that increases the concentration of $C O_{2}$ at the enzyme site.