Chapter 24, Problem 91A

Interpretation Introduction

Interpretation: The formation of an enzyme-substrate complex in the active site of the enzyme is described.

Concept introduction: Enzymes are present in every living thing. Enzymes are proteins that catalyze the biochemical reactions that occur in living organisms.

Answer to Problem 91A

An enzyme-substrate complex is formed when the substrate binds to an enzyme's active site, like a lock and key.

Explanation of Solution

An enzyme-substrate complex is formed when a substrate is bound to the corresponding active site of an enzyme. According to the lock and key model, the substrate molecules that match the active site of an enzyme can fit together like a real key in a real lock.

The catalytically active functional groups of the enzyme are located on the contact surface between the enzyme and the substrate. On the other hand, the atoms and chemical bonds of the substrate that are to be acted upon are located on this contact surface.

Conclusion

An enzyme-substrate complex is formed when the substrate binds to an enzyme's active site, like a lock and key.