Which of the following is a characteristic of an isoenzyme?
A) More than one enzyme is regulated by the same mechanism.
B) The same reaction can be catalyzed by multiple enzyme variants.
C) Multiple binding sites on the same enzyme enable multiple regulation mechanisms.
D) More than one gene makes the same enzyme.

Question

Quizplus · Accepted Answer

An isoenzyme is a variant form of an enzyme that catalyzes the same reaction but differs in its amino acid composition and/or physical properties. Therefore, the same reaction can be catalyzed by multiple enzyme variants, making B the correct characteristic of an isoenzyme. While A, C, and D are all characteristics of enzymes, they do not specifically apply to isoenzymes.

Which of the Following Is a Characteristic of an Isoenzyme