Question

Plants which exhibit photorespiration are:

• A. $C_4$ plants
• B. $C_3$ plants
• C. CAM plants
• D. Alpine plants

Answer 1

The correct option is B $C_3$ plants

Photorespiration is a process in which oxygen rather than carbon dioxide reacts with ribulose 1, 5 bisphosphate (RUBP). This reaction is catalyzed by oxygenase activity of the RUBISCO enzyme and reduces the net fixation of carbon dioxide. This phenomenon is seen in C${}_3$ plants. The C${}_4$ plants have a carbon dioxide concentrating mechanism and they concentrate carbon dioxide in the bundle sheath cell where RUBISCO is located. Hence,$C_4$ plants do not show photorespiration.

So, the correct answer is 'C${}_3$ plants'