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Enzymatic reactions-graphic curve of variation of speed

Regarding the enzymatic reactions, how different are the graphic curve of variation of speed of a reaction as function of substrate concentration and curve of variation of speed of a reaction as function of temperature?

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The curve of variation of speed of enzymatic reaction as a function of rising substrate concentration is a growing curve till the point where it stabilizes because of the saturation of the activation centers of enzymes.

The curve of variation of speed of enzymatic reaction as a function of rising temperature has a crescent portion and reaches a peak (or optimum temperature) then it decreases down and reaches nil in point of inactivity of enzymes through denaturation.

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