InterviewSolution
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InterviewSolution
| 1. |
Notes of photo respiration topic |
| Answer» \tThe first step of the Calvin pathway is the first CO2 fixation step.\tRespiration is the reaction where RuBP combines with CO2 to form 2 molecules of 3PGA, that is catalysed by RuBisCO.RuBP + CO2\xa0-> 2 X 3PGA\tRuBisCO has a much greater affinity for CO2 than for O2.\tIn C3 plants, some O2 do bind to RuBisCO, and hence CO2 fixation is decreased.\tThe RuBP instead of being converted to 2 molecules of PGA binds with O2 to form one molecule and phosphoglycolate in a pathway called photorespiration.\tIn the photorespiratory pathway, there is neither synthesis of sugars, nor of ATP. | |