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

The term 'insoluble fiber' on food packages refers to which of the following molecules?

Cellulose

Lactose

Glycogen

Amylose

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Verified step by step guidance

Understand the term 'insoluble fiber': Insoluble fiber refers to dietary components that cannot dissolve in water and pass through the digestive system largely intact, aiding in digestion and promoting bowel health.

Identify the molecular structure of cellulose: Cellulose is a polysaccharide composed of β-glucose units linked by β-1,4-glycosidic bonds. Its structure is highly rigid and forms fibers that are insoluble in water.

Compare cellulose with the other options: Lactose is a disaccharide (sugar) composed of glucose and galactose, soluble in water. Glycogen is a highly branched polysaccharide used for energy storage in animals, and amylose is a linear polysaccharide component of starch, which is partially soluble in water.

Relate cellulose to its role in insoluble fiber: Cellulose is a major component of plant cell walls and is not digestible by humans due to the lack of enzymes to break β-1,4-glycosidic bonds, making it an ideal candidate for insoluble fiber.

Conclude that cellulose is the correct answer: Based on its structural properties and role in digestion, cellulose is the molecule referred to as 'insoluble fiber' on food packages.