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

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

The correct answer is An inhibitor is being used in reaction B. See the explanation below, please.

Explanation:

Inhibitors are substances that bind in the enzyme sector where the substrate would bind. In the case of B, it binds to the enzyme in question, generating a lower enzyme-substrate concentration. There are competitive inhibitors (the inhibitor binds at a different site to the active site and the substrate can bind) and non-competitive (the inhibitor binds to the enzyme, preventing enzyme-substrate formation).

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