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

1. Which of the following best describes the term 'peptide chain' in the context of amino acid groups?

A circular arrangement of amino acids forming a ring structure

A single amino acid with a modified side chain

A group of amino acids with similar side chain properties

A linear sequence of amino acids linked by peptide bonds

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Verified step by step guidance

Understand the term 'peptide chain': A peptide chain refers to a linear sequence of amino acids that are covalently linked together by peptide bonds. Peptide bonds are formed through a condensation reaction between the carboxyl group (-COOH) of one amino acid and the amino group (-NH2) of another amino acid.

Clarify the structure: Unlike circular arrangements or single amino acids, a peptide chain is a linear structure. It has a defined directionality, starting with the amino (N-) terminus and ending with the carboxyl (C-) terminus.

Eliminate incorrect options: The first option, 'A circular arrangement of amino acids forming a ring structure,' describes a cyclic peptide, which is not the same as a peptide chain. The second option, 'A single amino acid with a modified side chain,' refers to an individual amino acid, not a chain. The third option, 'A group of amino acids with similar side chain properties,' describes a classification based on side chain characteristics, not a peptide chain.

Focus on the correct definition: The correct answer is 'A linear sequence of amino acids linked by peptide bonds,' which accurately describes the structure and formation of a peptide chain.

Relate to biological significance: Peptide chains are fundamental components of proteins, which are essential macromolecules in biological systems. Proteins are formed when one or more peptide chains fold into specific three-dimensional structures.