Question

Given below are two statements:
Statement I : In C3 plants, some O2 binds to RuBisCO, hence CO, fixation is decreased.
Statement II : In C4 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. Both Statement I and Statement II are true
• B. Both Statement I and Statement II are false
• C. Statement I is true but Statement II is false
• D. Statement I is false but Statement II is true

Answer 1

Answer: (C)

Statement I is true but Statement II is false

Answer 2

In C3 plants , RuBisCO can bind oxygen instead of carbon dioxide, leading to photorespiration and reduced CO2 fixation.

In C4 plants , mesophyll cells indeed have low photorespiration, but the bundle sheath cells also show some degree of photorespiration, contrary to the second statement.