MCQ
Given below are two statements:

Statement $I$: In $\mathrm{C}_3$ plants, some $\mathrm{O}_2$ binds to $\mathrm{RuBisCO}$, hence $\mathrm{CO}_2$ fixation is decreased.

Statement $II$: In $\mathrm{C}_4$ 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
    Both Statement $I$ and Statement $II$ are false
  • Statement $I$ is true but Statement $II$ is false
  • C
    Statement $I$ is false but Statement $II$ is true
  • D
    Both Statement $I$ and Statement $II$ are true

Answer

Correct option: B.
Statement $I$ is true but Statement $II$ is false
b
photorespiration does not occur in $\mathrm{C}_4$ plants as they lack RuBis$CO$ in mesophy$ll$. Hence statement $I$ is the only correct option.

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