Which of the following would be unlikely to contribute to the substrate specificity of an enzyme? a. a similar shape exists between a pocket on the surface of the enzyme and a functional group on the substrate. b. a hydrophobic group on the substrate interacts with several hydrophobic amino acids on the enzyme. c. the enzyme has the ability to change its configuration in response to the substrate binding. d. the enzyme has an allosteric regulatory site. e. a positive charge on the substrate is attracted to a negative charge in the active site of the enzyme.

The correct answer is d The enzyme has an allosteric regulatory site.

Explanation:

The allosteric site of an enzyme does not contribute to substrate specificity of an enzyme because allosteric site does not act to bind with the substrate because allosteric site is a regulatory site of an enzyme which interacts with modulators molecules.

          All the other options mentioned in the question contribute to substrate specificity of an enzyme such as similar shape exist between a pocket on the surface of the enzyme and functional group on the substrate. The enzyme undergo Configurational change in response to substrate binding.

"a.) well–developed vascular system."