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

9. Carbohydrates

Cellulose

Biochemistry

9. Carbohydrates

Cellulose

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Multiple Choice

Cellulose fibers most closely resemble _____________ in proteins.

α-helices.

β-sheets

β-turns.

Coiled-coils.

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Verified step by step guidance

Understand the structure of cellulose: Cellulose is a polysaccharide consisting of a linear chain of β(1→4) linked D-glucose units. Its structure is characterized by long, straight chains that form strong fibers due to hydrogen bonding between adjacent chains.

Review the structure of protein secondary elements: Proteins have several types of secondary structures, including α-helices, β-sheets, β-turns, and coiled-coils. Each of these structures has distinct characteristics.

Compare cellulose fibers to protein structures: Cellulose fibers are linear and form strong, sheet-like structures due to hydrogen bonding, similar to the way β-sheets in proteins are formed by hydrogen bonds between backbone atoms in different polypeptide chains or different segments of the same chain.

Analyze the characteristics of β-sheets: β-sheets are formed by linking two or more β-strands by hydrogen bonds, creating a sheet-like structure. This is similar to the parallel arrangement and hydrogen bonding seen in cellulose fibers.

Conclude the comparison: Based on the structural similarities, cellulose fibers most closely resemble β-sheets in proteins due to their linear, sheet-like arrangement and the role of hydrogen bonding in maintaining their structure.