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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

8. Protein Function

Myoglobin vs. Hemoglobin

Biochemistry

8. Protein Function

Myoglobin vs. Hemoglobin

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Multiple Choice

Which of the following best describes the primary role of myoglobin in vertebrate muscle tissue?

It catalyzes the breakdown of hydrogen peroxide.

It stores oxygen and facilitates its diffusion to muscle cells.

It acts as a buffer to maintain blood pH.

It transports oxygen from the lungs to peripheral tissues.

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Verified step by step guidance

Understand the role of myoglobin: Myoglobin is a globular protein found in muscle tissue, and its primary function is related to oxygen storage and transport within muscles.

Eliminate incorrect options: Myoglobin does not catalyze the breakdown of hydrogen peroxide. This is a function typically associated with enzymes like catalase.

Eliminate another incorrect option: Myoglobin does not act as a buffer to maintain blood pH. Buffers like bicarbonate are responsible for pH regulation in the blood.

Differentiate myoglobin from hemoglobin: Myoglobin is not responsible for transporting oxygen from the lungs to peripheral tissues. This is the role of hemoglobin in red blood cells.

Conclude the correct role: Myoglobin stores oxygen in muscle tissue and facilitates its diffusion to muscle cells, especially during periods of high metabolic demand, such as exercise.