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 of the following is an amino acid?

Glycine

Glucose

Adenine

Cholesterol

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Verified step by step guidance

Step 1: Understand the definition of an amino acid. Amino acids are organic compounds that contain both an amino group (-NH₂) and a carboxyl group (-COOH). They are the building blocks of proteins.

Step 2: Analyze the options provided. Glycine, Glucose, Adenine, and Cholesterol are listed. Determine which of these fits the structural criteria of an amino acid.

Step 3: Recall the structure of Glycine. Glycine is the simplest amino acid with the chemical formula NH₂-CH₂-COOH. It contains both an amino group and a carboxyl group, making it an amino acid.

Step 4: Examine the other options. Glucose is a carbohydrate (a sugar), Adenine is a nitrogenous base found in nucleotides, and Cholesterol is a lipid. None of these fit the structural definition of an amino acid.

Step 5: Conclude that Glycine is the correct answer because it meets the structural and functional criteria of an amino acid.