Other possible versions of this question that could be used:

1. Enzymes help chemical reactions in living organisms. How would a molecular biologist explain how an enzyme molecule binds to its correct substrate and reduces the possibility of incorrect interactions?

2.  Enzymes help in chemical reactions in living organisms. There are thousands of different molecules in a cell. How would a molecular biologist explain the mechanism that allows an enzyme to bind to a correct molecule?

We recommend that you administer these questions as homework and preface the question with these instructions for students:

"For the following question, please respond to the best of your knowledge and using only the information in the question and what you know. Please do not refer to any outside sources (textbooks, notes, internet, etc.). Any reasonable attempt to answer the question will be awarded full credit."