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

1. Introduction to Biochemistry

Carbohydrates

Biochemistry

1. Introduction to Biochemistry

Carbohydrates

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Multiple Choice

What is the primary structural difference between starch and cellulose?

Starch is found in animal tissues, while cellulose is found in plant tissues.

Starch is a branched polymer, while cellulose is a linear polymer with α(1→6) linkages.

Starch is composed of α(1→4) glycosidic bonds, while cellulose is composed of β(1→4) glycosidic bonds.

Starch contains only fructose units, while cellulose contains only glucose units.

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Verified step by step guidance

Understand the structural composition of starch and cellulose: Both are polysaccharides composed of glucose units, but their glycosidic linkages differ.

Examine the glycosidic bonds in starch: Starch is composed of α(1→4) glycosidic bonds, which connect glucose molecules in a way that creates a helical structure. Additionally, amylopectin (a component of starch) contains α(1→6) linkages at branch points.

Examine the glycosidic bonds in cellulose: Cellulose is composed of β(1→4) glycosidic bonds, which connect glucose molecules in a linear fashion, allowing for the formation of strong hydrogen bonds between adjacent chains.

Compare the structural implications: The α(1→4) linkages in starch result in a structure optimized for energy storage, while the β(1→4) linkages in cellulose result in a rigid, fibrous structure ideal for providing structural support in plant cell walls.

Clarify the misconception: Starch is not found in animal tissues; it is a storage polysaccharide in plants. Cellulose is also found in plants, but it serves a structural role rather than a storage role.