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

How does an enzyme work to catalyze a reaction?

By providing additional reactants to the reaction

By permanently binding to the substrate and becoming part of the product

By increasing the temperature of the reaction environment

By lowering the activation energy required for the reaction to proceed

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Verified step by step guidance

Understand the role of enzymes: Enzymes are biological catalysts that speed up chemical reactions without being consumed in the process. They achieve this by lowering the activation energy required for the reaction to proceed.

Define activation energy: Activation energy is the minimum amount of energy required for reactants to transform into products. Enzymes reduce this energy barrier, making it easier for the reaction to occur.

Explain the mechanism: Enzymes bind to substrates (reactants) at their active site, forming an enzyme-substrate complex. This stabilizes the transition state and reduces the energy needed for the reaction.

Clarify why other options are incorrect: Enzymes do not provide additional reactants, permanently bind to substrates, or increase the temperature of the reaction environment. Instead, they facilitate the reaction by lowering activation energy.

Summarize the correct answer: The correct explanation is that enzymes catalyze reactions by lowering the activation energy required for the reaction to proceed, making the process faster and more efficient.