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 Configuration

Biochemistry

3. Amino Acids

Amino Acid Configuration

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Multiple Choice

Which of the following amino acids has more than one asymmetric (chiral) center?

Serine

Glycine

Alanine

Isoleucine

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Verified step by step guidance

Step 1: Understand the concept of an asymmetric (chiral) center. A chiral center is a carbon atom that is bonded to four different groups. This property makes the molecule non-superimposable on its mirror image.

Step 2: Analyze the structure of each amino acid provided in the question. Use the general formula for amino acids and their specific side chains to determine the number of chiral centers.

Step 3: Glycine has no chiral centers because its side chain is a hydrogen atom, making two of the groups bonded to the alpha carbon identical.

Step 4: Serine and Alanine each have one chiral center at the alpha carbon, which is bonded to four different groups: the amino group (-NH2), the carboxyl group (-COOH), the hydrogen atom, and their respective side chains.

Step 5: Isoleucine has two chiral centers. The alpha carbon is chiral, and an additional chiral center exists in its side chain. This makes Isoleucine unique among the options provided.