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the graph above shows the progress of an enzyme-catalyzed chemical reaction. based on the graph, which of the following is true?

a. an inhibitor is being used in reaction a.
b. an inhibitor is being used in reaction b.
c. a substrate is being used in reaction a.
d. a substrate is being used in reaction b.

Option (A) is the correct answer.

Explanation:

An inhibitor is defined as a substance which stops or inhibits the occurrence of a chemical reaction. So, an inhibitor basically slow down a chemical reaction by increasing the activation energy of the chemical reaction.

On the other hand, a catalyst helps in increasing the rate of a chemical reaction. This is because a catalyst lowers the activation energy and hence, more number of reactant molecules take part in the chemical reaction.

This causes an increase in the rate of a chemical reaction.

A substrate is a substance at which an enzyme acts. Basically, an enzyme binds to the active site of substrate.

So, in the given reaction energy of reaction A is more than reaction B.

Thus, we can conclude that in the given graph an inhibitor is being used in reaction A.

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this is really easy just look up what these words mean