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

Enzyme-Substrate Complex

Biochemistry

6. Enzymes and Enzyme Kinetics

Enzyme-Substrate Complex

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Multiple Choice

How does an enzyme speed up chemical reactions?

By lowering the activation energy required for the reaction to proceed

By increasing the temperature of the reaction environment

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

By providing additional reactants to the 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 chemical reactions without being consumed in the process.

Learn about activation energy: Activation energy is the minimum energy required for a chemical reaction to occur. Enzymes work by lowering this energy barrier, making it easier for the reaction to proceed.

Clarify the mechanism of enzyme action: Enzymes bind to substrates (reactants) at their active site, forming an enzyme-substrate complex. This stabilizes the transition state and reduces the activation energy.

Eliminate incorrect options: Enzymes do not increase the temperature of the reaction environment, permanently bind to substrates, or provide additional reactants. Their role is specific to lowering activation energy.

Conclude the correct answer: The correct explanation is that enzymes speed up chemical reactions by lowering the activation energy required for the reaction to proceed.