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

Enzymes catalyze chemical reactions by lowering the:

equilibrium constant

activation energy

free energy of the products

concentration of substrates

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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 achieve this by lowering the activation energy required for the reaction to proceed.

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, making it easier for the reaction to occur.

Clarify equilibrium constant: The equilibrium constant (K_eq) is a ratio that describes the balance between reactants and products at equilibrium. Enzymes do not alter the equilibrium constant; they only speed up the rate at which equilibrium is reached.

Explain free energy of products: The free energy of the products is a thermodynamic property that remains unchanged by the presence of enzymes. Enzymes do not affect the overall energy change (ΔG) of the reaction.

Discuss substrate concentration: Enzymes do not directly lower the concentration of substrates. Instead, they bind to substrates to form enzyme-substrate complexes, facilitating the conversion of substrates into products.