34. The rate of reaction rate slows down
and then levels off at point B because when their is a constant enzyme concentration,
the reaction levels off when the amount of substrate exceeds the amount of enzyme.
In this case, at point B, all the enzyme molecules are working to catalyze the
reaction, so the rate of reaction can't increase. The only way at this point
to increase the reaction would be to add more enzyme.
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Slichter