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

Each amino acid contains a central (alpha) carbon atom attached to a hydrogen atom, along with which three groups?

A carbonyl group, a hydroxyl group, and a methyl group

A sulfhydryl group, a carboxyl group, and a benzene ring

An amino group, a carboxyl group, and a variable R group (side chain)

A phosphate group, a methyl group, and a hydroxyl group

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Verified step by step guidance

Step 1: Begin by understanding the structure of an amino acid. Each amino acid has a central alpha carbon atom, which is the backbone of its structure.

Step 2: Identify the groups attached to the alpha carbon. These include a hydrogen atom, an amino group (-NH2), a carboxyl group (-COOH), and a variable R group (side chain).

Step 3: Recognize that the R group (side chain) is what differentiates one amino acid from another. It can vary in size, charge, and chemical properties.

Step 4: Compare the options provided in the question. Eliminate choices that do not match the standard structure of an amino acid. For example, a phosphate group or benzene ring is not part of the basic amino acid structure.

Step 5: Confirm that the correct answer is: 'An amino group, a carboxyl group, and a variable R group (side chain),' as these are the three groups universally present in all amino acids.