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 best describes the four protein chains that make up the immunoglobulin (antibody) monomer?

Two identical heavy chains and two identical light chains linked by disulfide bonds

Two alpha chains and two beta chains forming a quaternary structure

Four identical heavy chains arranged in a tetrameric structure

One heavy chain, one light chain, and two gamma chains

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Verified step by step guidance

Step 1: Begin by understanding the structure of an immunoglobulin (antibody) monomer. Immunoglobulins are proteins that play a key role in the immune system by recognizing and binding to antigens.

Step 2: Recall that the immunoglobulin monomer consists of four polypeptide chains: two identical heavy chains and two identical light chains. These chains are linked together by disulfide bonds, which stabilize the structure.

Step 3: Compare the given options to the known structure of immunoglobulins. Eliminate options that do not match the description of two identical heavy chains and two identical light chains linked by disulfide bonds.

Step 4: Note that the heavy chains are larger and contain regions responsible for antigen binding and effector functions, while the light chains contribute to the antigen-binding site.

Step 5: Confirm that the correct answer is the option describing 'Two identical heavy chains and two identical light chains linked by disulfide bonds,' as this matches the established structure of immunoglobulin monomers.