A biologist working in a lab adds a compound to a solution that contains an enzyme and substrate. This particular compound binds reversibly to the enzyme at the active site. Once the compound is bound to the enzyme, the catalysis of substrate to product stops. Which of the statements is true of the compound? a. The compound is a catalyst for the reaction. b. The effect of the compound cannot be overcome by adding more substrate. c. The compound is an allosteric inhibitor. d. The effect of the compound can be overcome by adding more substrate. e. The compound is an allosteric activator.

An inhibitor works in many ways, but this particular one binds to the allosteric site in the enzyme causing a decrease of the enzymatic activity. When this situation happens, the inhibitor doesn't bind to the active site, but it changes the enzyme's shape so it cannot work properly anymore.

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Histrionicus Histrionicus · Answer 2 · 2022-02-17T15:52:32+01:00

The statement is true of compound - d. The effect of the compound can be overcome by adding more substrate.

Competitive Inhibitor

Inhibitors slow down the rate of enzyme activity and are classified as competitive and non-competitive inhibitors.

Competitive inhibitors - these compounds compete with the substrate to bind the active sites on the enzyme. The effect of competitive inhibitors may be reduced by increasing the concentration of the substrate.

In this case, the biologist was using a competitive inhibitor, and therefore adding more substrate would overcome its effect on enzyme catalysis

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