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

Which of the following statements best describes enzyme function?

Enzymes permanently alter their structure after catalyzing a reaction.

Enzymes increase the equilibrium constant of a reaction.

Enzymes lower the activation energy of a reaction, increasing the reaction rate without being consumed.

Enzymes provide energy to drive endergonic reactions.

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Verified step by step guidance

Understand the role of enzymes in biochemical reactions: Enzymes are biological catalysts that speed up reactions by lowering the activation energy required for the reaction to proceed.

Clarify the concept of activation energy: Activation energy is the minimum energy required for reactants to transform into products. Enzymes achieve this by stabilizing the transition state, making it easier for the reaction to occur.

Examine the statement about enzyme structure: Enzymes do not permanently alter their structure after catalyzing a reaction. They remain unchanged and can be reused for multiple reaction cycles.

Evaluate the equilibrium constant claim: Enzymes do not change the equilibrium constant of a reaction. They only affect the rate at which equilibrium is reached, not the position of equilibrium itself.

Address the energy provision claim: Enzymes do not provide energy to drive endergonic reactions. Instead, they couple endergonic reactions with exergonic ones or utilize energy sources like ATP to facilitate the process.