Table of contents

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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

Which of the following best explains how enzymes function as metabolic catalysts?

They are consumed during the reaction and cannot be reused.

They increase the overall free energy change (9G) of the reaction.

They change the equilibrium position of the reaction.

They lower the activation energy required for a 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.

Recall the concept of activation energy: Activation energy is the energy barrier that must be overcome for a reaction to proceed. Enzymes function by lowering this energy barrier.

Clarify the misconception about free energy (ΔG): Enzymes do not change the overall free energy change (ΔG) of a reaction. They only affect the rate at which equilibrium is reached.

Explain equilibrium position: Enzymes do not alter the equilibrium position of a reaction. They simply help the reaction reach equilibrium faster by lowering the activation energy.

Conclude with the correct explanation: Enzymes lower the activation energy required for a reaction to proceed, making it easier for reactants to be converted into products.