as light intensity increases, so does the rate as light provides the energy in this endothermic reaction, light is no longer affecting photosynthesis so either carbon dioxide or temperature is a limiting factor, as carbon dioxide increases it increases the rate of photosynthesis as it is a reactant required for this reaction. The gas is a limiting factor at this point, either temperature of light intensity is a limiting factor at this point, as temperature increases enzymes have more frequent collisions with their substrates that speed up photosynthesis, this is the optimum temperature, high temperatures are still a limiting factor and here they decrease the rate of photosynthesis as some enzymes are now denatured.

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