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

Enzymes

Biochemistry

6. Enzymes and Enzyme Kinetics

Enzymes

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Multiple Choice

What is the effect of an enzyme on the activation energy of a chemical reaction?

It lowers the activation energy required for the reaction to proceed.

It changes the overall free energy (9G) of the reaction.

It increases the activation energy required for the reaction to proceed.

It has no effect on the activation energy of the reaction.

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Verified step by step guidance

Understand the concept of activation energy: Activation energy is the minimum energy required for reactants to transform into products during a chemical reaction. Enzymes play a critical role in modifying this energy barrier.

Learn the role of enzymes: Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy, making it easier for the reaction to proceed under physiological conditions.

Clarify the relationship between activation energy and reaction rate: Lowering the activation energy increases the rate of the reaction because more reactant molecules can overcome the energy barrier and form products.

Understand the distinction between activation energy and free energy (ΔG): Enzymes do not change the overall free energy (ΔG) of the reaction. ΔG determines whether a reaction is spontaneous, while activation energy determines the rate of the reaction.

Evaluate the options provided: Based on the above concepts, identify the correct statement about the effect of enzymes on activation energy. The correct answer is that enzymes lower the activation energy required for the reaction to proceed.