NEETBotanyPhotosynthesis in Higher Plants
Read the following statements and choose the following option: 1. The basic pathway that results in the formation of the sugars, the Calvin pathway, is different in the C3 and C4 plants. 2. First step in Calvin cycle is CO2 fixation 3. RuBisCO has a much greater affinity for O2 when the CO2: O2 is nearly equal. 4. In photorespirationn, there is synthesis of sugars.
Options
- ABoth 2 and 3 is correct
- BOnly 4 is correct
- COnly 2 is correct
- DBoth 1 and 2 is incorrect
Correct answer
C. Only 2 is correct
Step-by-step solution
The first step of the Calvin pathway – the first CO2 fixation step. This is the reaction where RuBP combines with CO2 to form 2 molecules of 3PGA, that is catalysed by RuBisCO.