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

Activation Energy

Biochemistry

6. Enzymes and Enzyme Kinetics

Activation Energy

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Multiple Choice

Which of the following best describes the energy of activation for a reaction?

The difference in free energy between the substrate and product.

The difference in entropy between the substrate and transition state.

The difference in free energy between the substrate and the transition state.

The difference in entropy between the product and transition state.

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Verified step by step guidance

Understand the concept of activation energy: Activation energy is the minimum energy required for a chemical reaction to occur. It is the energy barrier that must be overcome for reactants to be transformed into products.

Identify the role of the transition state: In a chemical reaction, the transition state is a high-energy, unstable state that occurs between the reactants and products. It represents the point at which old bonds are breaking and new bonds are forming.

Differentiate between free energy and entropy: Free energy, often denoted as Gibbs free energy (G), is a thermodynamic quantity that combines enthalpy and entropy to predict the spontaneity of a reaction. Entropy (S) is a measure of disorder or randomness in a system.

Relate activation energy to free energy: The activation energy is related to the difference in free energy between the substrate (reactants) and the transition state. This difference determines the energy barrier that must be overcome for the reaction to proceed.

Clarify the correct description: The correct description of activation energy is the difference in free energy between the substrate and the transition state, not between the substrate and product or involving entropy differences.