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 class of enzymes is primarily responsible for detoxifying reactive oxygen species (ROS) in cells?

Ligases

Oxidoreductases

Hydrolases

Isomerases

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Verified step by step guidance

Understand the role of reactive oxygen species (ROS) in cells: ROS are highly reactive molecules that can cause oxidative damage to proteins, lipids, and DNA. Cells have mechanisms to detoxify ROS to prevent damage.

Review the function of oxidoreductases: Oxidoreductases are enzymes that catalyze oxidation-reduction reactions, which involve the transfer of electrons. These enzymes are crucial in neutralizing ROS by converting them into less harmful molecules.

Compare the functions of the other enzyme classes: Ligases catalyze the joining of two molecules, hydrolases catalyze the cleavage of bonds using water, and isomerases catalyze the rearrangement of molecular structures. None of these classes are primarily involved in detoxifying ROS.

Identify examples of oxidoreductases involved in ROS detoxification: Key enzymes include superoxide dismutase (SOD), which converts superoxide radicals into hydrogen peroxide, and catalase, which further breaks down hydrogen peroxide into water and oxygen.

Conclude that oxidoreductases are the primary class of enzymes responsible for detoxifying ROS, as their function aligns with the biochemical processes required to neutralize these reactive molecules.