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 best describes the primary function of enzymes in biological systems?

They provide energy for cellular processes.

They increase the equilibrium constant of reactions.

They act as structural components of cell membranes.

They lower the activation energy of biochemical reactions.

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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 do not provide energy or act as structural components; their primary function is to facilitate reactions.

Clarify the concept of activation energy: Activation energy is the minimum energy required for a chemical reaction to proceed. Enzymes lower this energy barrier, making it easier for reactions to occur.

Distinguish between equilibrium constant and reaction rate: Enzymes do not change the equilibrium constant of a reaction; they only affect the rate at which equilibrium is reached by lowering the activation energy.

Eliminate incorrect options: Review the provided choices and eliminate those that do not align with the primary function of enzymes. For example, enzymes do not provide energy or act as structural components.

Select the correct answer: Based on the understanding of enzyme function, the correct answer is that enzymes lower the activation energy of biochemical reactions, enabling faster reaction rates.