1.

Under what conditions are C4 plants superior to C3?

Answer»
ConditionsC4 plantsC3 plants
(1) CO2 fixation rate under light conditionsHighLow
(2) Whether Photorespiration is present at low light intensitiesNegligibleHigh
(3) Whether Photorespiration is present at high light intensitiesNegligibleHigh
(4) Whether Photorespiration would be present at low CO2 concentrationNegligibleHigh
(5) Whether Photorespiration would be present at high CO2 concentrationNegligibleHigh
(6) Optimum Temperature30–40°C20–25°C
7) Primary acceptor of CO2PEPARUBP
(8) Primary productOAA(4C) PGA(3C)
(9) Does the plant have RUBISCO?In bundle sheath cells onlyYes
(10) Does the plant have PEP case ?YesNo



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