A biologist working in a lab adds a compound to a solution t

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 following is true of the compound?

a. The compound is an allosteric activator.

b. The compound is an allosteric inhibitor.

c. The compound is a catalyst for the reaction.

d. The effect of the compound can be overcome by adding more substrate.

Solution

d. The effect of the compound can be overcome by adding more substrate.

The remaining three options does not fit the statement.

Allosteric inhibitor or activator does not bind at the active site of enzyme , instead they bind at regulatory site. In the same way, if compound would have been catalyst for three reaction, then it would have bound to substrate and not to enzyme in solution.