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 major structural difference between amylose and glycogen?

Amylose is a linear polymer of glucose, while glycogen is highly branched.

Amylose is composed of β(1→4) linkages, while glycogen contains only α(1→6) linkages.

Amylose contains fructose units, while glycogen contains only glucose units.

Glycogen is a linear polymer, while amylose is highly branched.

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Verified step by step guidance

Step 1: Begin by identifying the key structural components of amylose and glycogen. Amylose is a polysaccharide composed of glucose units linked primarily by α(1→4) glycosidic bonds, forming a linear structure. Glycogen, on the other hand, is also composed of glucose units but includes both α(1→4) glycosidic bonds for linear chains and α(1→6) glycosidic bonds at branch points, making it highly branched.

Step 2: Clarify the type of glycosidic linkages present in each molecule. Amylose contains only α(1→4) linkages, while glycogen contains both α(1→4) and α(1→6) linkages. This difference in linkage types contributes to the structural variation between the two molecules.

Step 3: Address the misconception in the problem statement regarding β(1→4) linkages. Amylose does not contain β(1→4) linkages; it is composed of α(1→4) linkages. β(1→4) linkages are found in cellulose, not amylose.

Step 4: Discuss the branching pattern. Amylose is linear and unbranched, while glycogen is highly branched due to the presence of α(1→6) linkages at branch points. This branching allows glycogen to be more compact and efficient for energy storage.

Step 5: Conclude by emphasizing that both amylose and glycogen are composed of glucose units, not fructose. The problem statement incorrectly suggests that amylose contains fructose units, which is not true. Both molecules are glucose-based polysaccharides with distinct structural differences.