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

Functional Groups

Biochemistry

1. Introduction to Biochemistry

Functional Groups

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Multiple Choice

Which functional group is involved in the formation of disulfide bridges in proteins?

Amino (–NH_2)

Thiol (–SH)

Carboxyl (–COOH)

Hydroxyl (–OH)

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Verified step by step guidance

Understand the context: Disulfide bridges are covalent bonds that stabilize the tertiary and quaternary structure of proteins. These bonds are formed between specific functional groups in amino acids.

Identify the amino acid responsible: The thiol group (–SH) is found in the side chain of the amino acid cysteine. This group is crucial for forming disulfide bridges.

Explain the chemical reaction: Two thiol groups from cysteine residues undergo oxidation to form a disulfide bond (–S–S–). This reaction involves the removal of hydrogen atoms from the thiol groups.

Compare functional groups: Amino (–NH_2), carboxyl (–COOH), and hydroxyl (–OH) groups do not participate in disulfide bridge formation. Only the thiol group (–SH) has the chemical properties required for this reaction.

Conclude: The functional group involved in the formation of disulfide bridges in proteins is the thiol group (–SH), specifically from cysteine residues.