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CBSE Class 11-science Answered

Is photorespiration present at low co2 concentration in c3 and c4 plants?
Asked by arushidabhade | 18 Jan, 2020, 10:56: PM
Expert Answer
  • Photorespiration occurs when the concentration of CO2 is low in C3 and C4 plants. 
  • It is a wasteful metabolic pathway which occurs when rubisco, the carbon-fixing enzyme of the Calvin cycle, grabs O2 rather than CO2 in the absence of plenty of CO2.
  • It uses up fixed carbon, wastes energy, and tends to happens when plants close their stomata (leaf pores) to reduce water loss.
  • High temperatures make it even worse.
Answered by Sheetal Kolte | 20 Jan, 2020, 11:31: AM
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