Question

Do enzymes change during a chemical reaction

Answer 1

Answer: enzymes change the Keq for chemical reactions.

Explanation: many enzymes change shape slightly when substrate binds. reactions occur at the "active site" of enzymes, where a precise 3D orientation of amino acids is an important feature of catalysis.

Answer 2

A catalyst is a substance which speeds up a chemical reaction but remains unchanged itself at the end. Thus, enzymes alter the rates of chemical reactions without themselves being chemically changed at the end of the reaction.