Q. Given below are two statements: Statement I : In $C_3$ Plants, some $O_2$ binds RuBisCO, hence $CO_2$ fixation is decreased. Statement II: In $C_4$ plants, mesophyll cells show very little photorespiration while bundle sheath cells do not show photorespiration. In the light of the above statements, choose the correct answer from the options given below:
A) Statement I is true but Statement II is false.
B) Statement I is false but Statement II is true.
C) Both Statement I and Statement II are true.
D) Both Statement I and Statement II are false
Explanation
[Solution by Claude - not from source] I is true (oxygenase activity lowers carboxylation). In $C_4$ plants photorespiration is essentially absent because $CO_2$ is concentrated at RuBisCO in the bundle sheath, so II as worded is not accepted. (Medium confidence.) Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.