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

Which of the following polysaccharides is digestible by humans?

Starch

Peptidoglycan

Cellulose

Chitin

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Understand the structural differences between the polysaccharides listed: Starch, Peptidoglycan, Cellulose, and Chitin. Focus on the type of glycosidic bonds present in each polysaccharide.

Recall that humans can digest polysaccharides with α-glycosidic bonds, as enzymes like amylase can break these bonds. Starch contains α-1,4 and α-1,6 glycosidic bonds, making it digestible.

Examine the other polysaccharides: Peptidoglycan, Cellulose, and Chitin. These contain β-glycosidic bonds, which human digestive enzymes cannot break down effectively.

Note that Cellulose has β-1,4 glycosidic bonds, Chitin has β-1,4 glycosidic bonds with an acetylated amino group, and Peptidoglycan has β-glycosidic bonds in its structure. These structural features make them indigestible to humans.

Conclude that Starch is the only polysaccharide among the options that is digestible by humans due to its α-glycosidic bonds.