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

Previous problemNext problem

Struggling with Biochemistry?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

The enzyme catalase converts hydrogen peroxide into water and oxygen gas. Which of the following is true?

All enzymes utilize ATP to catalyze reactions.

All hydrogen peroxide is converted to products.

Catalase stops catalyzing when reaction reaches equilibrium.

Catalase catalyzes forward & reverse reactions at equilibrium.

Previous problemNext problem

Verified step by step guidance

Understand the role of catalase: Catalase is an enzyme that catalyzes the decomposition of hydrogen peroxide (H₂O₂) into water (H₂O) and oxygen gas (O₂). This reaction is crucial for protecting cells from oxidative damage caused by hydrogen peroxide.

Review enzyme catalysis: Enzymes, including catalase, lower the activation energy of a reaction, allowing it to proceed more quickly. They do not alter the equilibrium position of the reaction, meaning they do not change the concentrations of reactants and products at equilibrium.

Consider the concept of equilibrium: At equilibrium, the rate of the forward reaction (conversion of hydrogen peroxide to water and oxygen) equals the rate of the reverse reaction (recombination of water and oxygen to form hydrogen peroxide). Enzymes can catalyze both the forward and reverse reactions, maintaining equilibrium.

Evaluate the statement about ATP: Not all enzymes utilize ATP to catalyze reactions. ATP is often used in reactions that require energy input, but catalase does not require ATP to catalyze the decomposition of hydrogen peroxide.

Analyze the statement about reaction completion: Not all hydrogen peroxide is converted to products. At equilibrium, there is a balance between reactants and products, meaning some hydrogen peroxide remains unconverted.