Question

Which of the following statements are correct for photorespiration ?
Statement 1- Photorespiration takes place in $C_3$ plants at high temperatures.
Statement 2 - During the process RUBisCO brings about oxygenation of RuBP instead of carboxylation.

• A. Both statements 1 and 2 are correct.
• B. Both statements 1 and 2 are incorrect
• C. Statement 1 is correct but statement 2 is incorrect.
• D. Statement 1 is incorrect but statement 2 is correct

Answer 1

The correct option is A Both statements 1 and 2 are correct.

In $C_3$ plants photorespiration occurs at high temperature, low $C{O}_2$ concentration or high $O_2$. It does not take place in $C_4$ plants. Therefore, statement 1 is correct.

In this process the enzyme RUBisCO which normally brings about carboxylation of Ribulose Bis Phosphate catalyses its oxygenation.

Therefore, statement 2 is correct

So, the correct answer is 'Both statements 1 and 2 are correct.'