Q27 / 200 · NEET 2024 · Botany

Given below are two statements: Statement I: In $\mathrm{C}_3$ plants, some $\mathrm{O}_2$ binds to 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
  • Correct answer
    B
    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

Solution

In $\mathrm{C}_3$ plant, some $\mathrm{O}_2$ bind to RuBisCO, and hence $\mathrm{CO}_2$ fixation is decreased. Statement II is incorrect, photorespiration does not occur in $\mathrm{C}_4$ plants as they lack RuBisCO in mesophyll. Hence statement I is the only correct option.

Hence, the correct answer is option: 'B'.

Relevant Questions