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

Enzymes work by _____.

providing energy to drive endergonic reactions

increasing the equilibrium constant of a reaction

permanently altering the products of a reaction

lowering the activation energy of a reaction

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Verified step by step guidance

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

Recall the concept of activation energy: Activation energy is the minimum energy required for a reaction to proceed. Enzymes lower this energy barrier, making it easier for reactants to convert into products.

Clarify why enzymes do not provide energy: Enzymes do not supply energy to drive reactions; instead, they facilitate the reaction by stabilizing the transition state and reducing the activation energy.

Explain why enzymes do not alter equilibrium constants: Enzymes accelerate the rate at which equilibrium is reached but do not change the equilibrium constant itself, as they do not affect the overall thermodynamics of the reaction.

Conclude that enzymes work by lowering the activation energy of a reaction, enabling the reaction to occur more efficiently without permanently altering the products or themselves.