If the graph of an enzyme -catalyzed reaction shows a sigmoidal relationship between substrate concentration and reaction rate, then what can be said about the reaction?
A) It is allosterically regulated.
B) It is part of an oxidation -reduction process.
C) It is covalently regulated.
D) It is exergonic.
E) It is endergonic.

Question

Quizplus · Accepted Answer

A sigmoidal curve in the context of enzyme kinetics typically indicates allosteric regulation. Allosteric enzymes have multiple binding sites, and the binding of a substrate or other molecule at one site can affect the enzyme's activity at another site, leading to a non-linear (sigmoidal) relationship between substrate concentration and reaction rate.

If the Graph of an Enzyme -Catalyzed Reaction Shows a Sigmoidal