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

What is the name for the chemical group that is unique for each of the 20 amino acids?

Carboxyl group

R group (side chain)

Peptide bond

Amino group

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Verified step by step guidance

Step 1: Begin by understanding the structure of amino acids. Each amino acid has a central carbon atom (α-carbon) bonded to four groups: an amino group (-NH₂), a carboxyl group (-COOH), a hydrogen atom, and a unique side chain (R group).

Step 2: Recognize that the amino group (-NH₂) and carboxyl group (-COOH) are common to all amino acids and are not unique to any specific amino acid.

Step 3: Identify the R group (side chain) as the chemical group that varies among the 20 amino acids. This variation in the R group determines the chemical properties and functions of each amino acid.

Step 4: Understand that the peptide bond is not a chemical group but rather a covalent bond formed between the amino group of one amino acid and the carboxyl group of another during protein synthesis.

Step 5: Conclude that the correct answer to the question is the R group (side chain), as it is the chemical group unique to each of the 20 amino acids.