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 describes how enzymes catalyze reactions?

Alter the equilibrium constant (K_eq) of a reaction.

Decrease the thermodynamic free energy (ΔG) of a reaction.

Change nonspontaneous reactions into spontaneous reactions.

Force reactions to proceed in only one direction.

Stabilizing the transition state.

c & d.

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Verified step by step guidance

Understand that enzymes are biological catalysts that speed up chemical reactions without being consumed in the process.

Recognize that enzymes do not alter the equilibrium constant (Keq) of a reaction. The equilibrium position remains the same; enzymes only help the reaction reach equilibrium faster.

Note that enzymes do not change the thermodynamic free energy (ΔG) of a reaction. The ΔG is a property of the reaction itself and is not affected by the presence of an enzyme.

Realize that enzymes do not change nonspontaneous reactions into spontaneous ones. They can only accelerate reactions that are already thermodynamically favorable.

Understand that enzymes catalyze reactions by stabilizing the transition state, which lowers the activation energy required for the reaction to proceed, thereby increasing the reaction rate.