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

1. Introduction to Biochemistry

Proteins

Biochemistry

1. Introduction to Biochemistry

Proteins

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Multiple Choice

Which of the following statements correctly describes a structural difference between hemoglobin and myoglobin?

Hemoglobin and myoglobin have identical quaternary structures.

Both hemoglobin and myoglobin are tetramers.

Myoglobin contains four heme groups, while hemoglobin contains one.

Hemoglobin is a tetramer, while myoglobin is a monomer.

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Verified step by step guidance

Understand the structural organization of proteins: Proteins can have primary, secondary, tertiary, and quaternary structures. Hemoglobin and myoglobin differ in their quaternary structure, which refers to the arrangement of multiple polypeptide chains in a protein.

Recall the structural composition of hemoglobin: Hemoglobin is a tetramer, meaning it consists of four polypeptide chains (two alpha and two beta chains) and contains four heme groups, each capable of binding one oxygen molecule.

Recall the structural composition of myoglobin: Myoglobin is a monomer, meaning it consists of a single polypeptide chain and contains one heme group, which binds one oxygen molecule.

Compare the quaternary structures of hemoglobin and myoglobin: Hemoglobin has a quaternary structure due to its tetrameric nature, while myoglobin lacks a quaternary structure because it is a monomer.

Conclude that the correct statement is: 'Hemoglobin is a tetramer, while myoglobin is a monomer,' as this accurately describes the structural difference between the two proteins.