The graph given below shows the effect of pot | vedclass

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(D) The graph shows that at low light intensities,the rate of photosynthesis is the same for both untreated and treated $Chlorella$ samples,indicating

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Potassium cyanide appears to have no inhibiting effect on photosynthesis at low light intensities

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(D) The graph shows that at low light intensities,the rate of photosynthesis is the same for both untreated and treated $Chlorella$ samples,indicating that light is the limiting factor and potassium cyanide has no effect here.As light intensity increases,the rate of photosynthesis in the untreated sample continues to rise,whereas in the treated sample,it plateaus.Potassium cyanide is a known inhibitor of the dark reaction (Calvin cycle) by inhibiting enzymes like cytochrome oxidase. Since the dark reaction becomes the limiting factor at higher light intensities,the inhibition by potassium cyanide becomes apparent only at these higher intensities.Therefore,it can be deduced that potassium cyanide has no inhibiting effect on photosynthesis at low light intensities,where the light reaction is the limiting factor.

The graph given below shows the effect of potassium cyanide on the rate of photosynthesis of Chlorella at different light intensities. Which one of the following can be deduced from the graph?

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