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

Nonpolar Amino Acids

Biochemistry

3. Amino Acids

Nonpolar Amino Acids

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Multiple Choice

Which of the following nonpolar amino acids is classified as nonessential in humans?

Leucine

Alanine

Isoleucine

Valine

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Verified step by step guidance

Step 1: Understand the classification of amino acids. Amino acids are categorized as essential or nonessential based on whether the human body can synthesize them. Essential amino acids must be obtained through the diet, while nonessential amino acids can be synthesized by the body.

Step 2: Review the properties of nonpolar amino acids. Nonpolar amino acids have side chains that are hydrophobic and do not interact well with water. Examples include alanine, leucine, isoleucine, and valine.

Step 3: Identify which amino acids in the list are essential. Leucine, isoleucine, and valine are classified as essential amino acids because the human body cannot synthesize them and they must be obtained through dietary sources.

Step 4: Determine which amino acid is nonessential. Alanine is classified as a nonessential amino acid because the human body can synthesize it from pyruvate through transamination reactions.

Step 5: Conclude that among the given options, alanine is the nonpolar amino acid classified as nonessential in humans.