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 lists the three major structural components of a standard amino acid?

A central (alpha) carbon, an amino group ($-\mathrm{NH}_2$), and a carboxyl group ($-\mathrm{COOH}$)

A central (alpha) carbon, a sulfhydryl group, and a benzene ring

A central (alpha) carbon, a phosphate group, and a methyl group

A carboxyl group, a phosphate group, and a hydroxyl group

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Verified step by step guidance

Step 1: Begin by recalling the general structure of a standard amino acid. Amino acids are the building blocks of proteins and share a common structure consisting of three major components.

Step 2: Identify the central (alpha) carbon. This is the backbone of the amino acid structure, to which all other groups are attached.

Step 3: Recognize the amino group ($-\mathrm{NH}_2$). This functional group is attached to the alpha carbon and contributes to the basic properties of the amino acid.

Step 4: Identify the carboxyl group ($-\mathrm{COOH}$). This functional group is also attached to the alpha carbon and contributes to the acidic properties of the amino acid.

Step 5: Compare the options provided in the problem. The correct answer must include the central (alpha) carbon, the amino group ($-\mathrm{NH}_2$), and the carboxyl group ($-\mathrm{COOH}$), as these are the three major structural components of a standard amino acid.