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 statement best explains how enzymes speed up chemical reactions?

They lower the activation energy required for the reaction to proceed.

They provide additional reactants to the reaction.

They increase the temperature of the reaction environment.

They permanently bind to substrates, making the reaction irreversible.

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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.

Define activation energy: Activation energy is the minimum energy required for reactants to transform into products during a chemical reaction. Enzymes lower this energy barrier.

Explain how enzymes lower activation energy: Enzymes stabilize the transition state of the reaction, making it easier for reactants to convert into products. This increases the reaction rate.

Clarify why enzymes do not provide additional reactants or increase temperature: Enzymes do not alter the reactants or the environment's temperature; they only facilitate the reaction by lowering activation energy.

Discuss why enzymes do not permanently bind to substrates: Enzymes bind temporarily to substrates at their active site, forming an enzyme-substrate complex. After the reaction, the enzyme releases the product and remains unchanged, ready to catalyze another reaction.