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

What happens to the enzyme sucrase when it binds to its substrate sucrose?

Sucrase is permanently altered and cannot catalyze further reactions.

Sucrase is hydrolyzed along with sucrose.

Sucrase undergoes a conformational change to better fit the sucrose molecule.

Sucrase dissociates from the active site before catalysis occurs.

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Verified step by step guidance

Understand the role of sucrase: Sucrase is an enzyme that catalyzes the hydrolysis of sucrose into glucose and fructose. Enzymes are biological catalysts that speed up reactions without being consumed or permanently altered in the process.

Learn about enzyme-substrate interaction: Enzymes bind to their specific substrate at the active site, forming an enzyme-substrate complex. This binding is highly specific and often described by the 'lock and key' or 'induced fit' models.

Explore the induced fit model: When sucrase binds to sucrose, the enzyme undergoes a conformational change. This change allows the active site to better fit the substrate, stabilizing the transition state and facilitating the catalytic reaction.

Clarify the catalytic process: After the conformational change, sucrase catalyzes the hydrolysis of sucrose into glucose and fructose. The enzyme itself is not hydrolyzed or permanently altered during this process.

Understand enzyme recovery: Once the reaction is complete, sucrase releases the products (glucose and fructose) and returns to its original state, ready to catalyze another reaction with a new sucrose molecule.