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

Which element in the side chain is most likely responsible for methionine's unique properties?

Sulfur (S)

Nitrogen (N)

Phosphorus (P)

Oxygen (O)

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Verified step by step guidance

Understand the structure of methionine: Methionine is an amino acid with a side chain containing a sulfur atom. Its chemical formula is C5H11NO2S.

Recognize the role of sulfur in methionine: Sulfur is present in the thioether group (-CH2-S-CH3) of methionine's side chain, which contributes to its unique chemical properties.

Compare sulfur to other elements listed: Sulfur has distinct properties, such as its ability to form thioether bonds, which are not shared by nitrogen, phosphorus, or oxygen in this context.

Consider the biochemical significance: Methionine is often involved in methylation reactions and serves as the starting amino acid in protein synthesis, roles influenced by the sulfur atom in its side chain.

Conclude that sulfur is the element responsible for methionine's unique properties, as it is the defining feature of its side chain and contributes to its biochemical functions.