Enzymes are catalysts that increase the rate of reactions bypulling two substrates together. lowering the energy of activation. binding to a substrate and releasing protons. binding to a substrate and producing energy.

Answered: Enzymes are catalysts that increase the…

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter4: Energy And Metabolism

Section: Chapter Questions

Problem 2SQ

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Question

Enzymes are catalysts that increase the rate of reactions by

pulling two substrates together.
lowering the energy of activation.
binding to a substrate and releasing protons.
binding to a substrate and producing energy.

Expert Solution

Step 1

Catalysts speed up the chemical reaction without being changed themselves. All living organisms prepare biological catalysts called enzymes. Enzymes are globular proteins that act as biocatalysts for many chemical reactions. In the absence of enzymes, many chemical processes occur at a very slow rate in living organisms. By preparing enzymes, cells can regulate what chemical reactions happen in their cytoplasm.