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

3. Amino Acids

Amino Acid Groups

Biochemistry

3. Amino Acids

Amino Acid Groups

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Multiple Choice

Removal of the sulfhydryl (–SH) functional group would disrupt the structure of which amino acid?

Cysteine

Lysine

Serine

Phenylalanine

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Verified step by step guidance

Understand the question: The problem is asking which amino acid's structure would be disrupted by the removal of the sulfhydryl (–SH) functional group. This requires knowledge of amino acid structures and their functional groups.

Recall the structure of cysteine: Cysteine is a sulfur-containing amino acid with a sulfhydryl (–SH) group attached to its side chain. This group is critical for forming disulfide bonds, which stabilize protein structures.

Review the structures of the other amino acids: Lysine has an amino group (–NH2) in its side chain, serine has a hydroxyl group (–OH), and phenylalanine has a benzyl group. None of these contain a sulfhydryl (–SH) group.

Analyze the impact of removing the sulfhydryl group: Removing the –SH group from cysteine would disrupt its ability to form disulfide bonds, which are important for protein folding and stability. This disruption would not occur in lysine, serine, or phenylalanine because they do not have an –SH group.

Conclude that the amino acid affected by the removal of the sulfhydryl group is cysteine, as it is the only amino acid in the list with this functional group.