The Biology Project: Biochemistry

Energy, Enzymes, and Catalysis Problem Set

Problem 1: Features of enzyme catalyzed reactions.

Which statement about enzyme catalyzed reactions is NOT true?

A. enzymes form complexes with their substrates.
B. enzymes lower the activation energy for chemical reactions.
C. enzymes change the Keq for chemical reactions.
D. many enzymes change shape slightly when substrate binds.
E. reactions occur at the "active site" of enzymes, where a precise 3D orientation of amino acids is an important feature of catalysis.

The Biology Project
Department of Biochemistry and Molecular Biophysics
University of Arizona
Revised: October 2004
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