Table of contents

1. Introduction to Biochemistry4h 34m
2. Water3h 23m
3. Amino Acids8h 10m
4. Protein Structure10h 4m
5. Protein Techniques14h 5m
6. Enzymes and Enzyme Kinetics13h 38m
7. Enzyme Inhibition and Regulation 8h 42m
8. Protein Function 9h 41m
9. Carbohydrates7h 49m
10. Lipids5h 49m
11. Biological Membranes and Transport 6h 37m
12. Biosignaling9h 45m
Review 1: Nucleic Acids, Lipids, & Membranes2h 47m
Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway3h 12m
Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism2h 26m
Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation1h 48m

6. Enzymes and Enzyme Kinetics

Enzyme Kinetics

Biochemistry

6. Enzymes and Enzyme Kinetics

Enzyme Kinetics

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Multiple Choice

How do enzymes affect the rate of a chemical reaction?

They provide energy to drive the reaction forward.

They change the overall free energy change (\( \Delta G \)) of the reaction.

They increase the equilibrium constant of the reaction.

They lower the activation energy required for the reaction to proceed.

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Verified step by step guidance

Understand the role of enzymes in biochemical reactions: Enzymes are biological catalysts that speed up chemical reactions without being consumed in the process.

Clarify the concept of activation energy: Activation energy is the minimum energy required for reactants to reach the transition state and form products. Enzymes lower this energy barrier, making it easier for the reaction to proceed.

Explain why enzymes do not change the overall free energy change (

∆ G

): The free energy change of a reaction is determined by the difference in energy between reactants and products, which remains constant regardless of the presence of an enzyme.

Discuss equilibrium constant and reaction rate: Enzymes do not alter the equilibrium constant of a reaction, as they do not change the relative concentrations of reactants and products at equilibrium. Instead, they increase the rate at which equilibrium is reached by lowering the activation energy.

Conclude with the correct answer: Enzymes lower the activation energy required for the reaction to proceed, thereby increasing the reaction rate without altering the energy dynamics or equilibrium constant.