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

Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism

Glycogen Metabolism 1

Biochemistry

Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism

Glycogen Metabolism 1

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Multiple Choice

Which of the following best describes glycogen?

A disaccharide composed of glucose and galactose

A linear polymer of fructose found in plant cell walls

A highly branched polysaccharide that serves as the main storage form of glucose in animals

A lipid molecule used for long-term energy storage in animals

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Verified step by step guidance

Step 1: Understand the term 'glycogen' and its role in biochemistry. Glycogen is a polysaccharide, meaning it is a carbohydrate composed of many monosaccharide units (glucose) linked together.

Step 2: Recall the structural characteristics of glycogen. Glycogen is highly branched, which allows for rapid mobilization of glucose when energy is needed. This branching is achieved through α-1,4-glycosidic bonds in the linear chains and α-1,6-glycosidic bonds at the branch points.

Step 3: Identify the function of glycogen. Glycogen serves as the main storage form of glucose in animals, particularly in the liver and muscle tissues. It is broken down into glucose when the body requires energy.

Step 4: Compare glycogen to the other options provided. Glycogen is not a disaccharide (like glucose and galactose), nor is it a linear polymer of fructose (which describes cellulose in plants). It is also not a lipid molecule, as lipids are used for long-term energy storage, whereas glycogen is for short-term energy storage.

Step 5: Conclude that the correct description of glycogen is: 'A highly branched polysaccharide that serves as the main storage form of glucose in animals.' This matches its biochemical structure and function.