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

Polar Amino Acids

Biochemistry

3. Amino Acids

Polar Amino Acids

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Multiple Choice

Which of the following amino acids in a protein would have an affinity for water?

Phenylalanine

Leucine

Valine

Serine

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Verified step by step guidance

Step 1: Understand the concept of hydrophilic and hydrophobic amino acids. Hydrophilic amino acids have polar or charged side chains that interact favorably with water, while hydrophobic amino acids have nonpolar side chains that repel water.

Step 2: Analyze the chemical structure of each amino acid listed in the problem. Phenylalanine, Leucine, and Valine all have nonpolar side chains, making them hydrophobic and less likely to interact with water.

Step 3: Examine the structure of Serine. Serine has a polar hydroxyl (-OH) group in its side chain, which can form hydrogen bonds with water molecules, giving it an affinity for water.

Step 4: Compare the properties of Serine with the other amino acids listed. The presence of the polar hydroxyl group in Serine distinguishes it as hydrophilic, unlike the hydrophobic side chains of Phenylalanine, Leucine, and Valine.

Step 5: Conclude that Serine is the amino acid in the protein with an affinity for water due to its polar side chain, which allows it to interact with water molecules effectively.