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

11. Biological Membranes and Transport

Biological Membrane Transport

Biochemistry

11. Biological Membranes and Transport

Biological Membrane Transport

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Multiple Choice

Rank the unfacilitated transmembrane diffusion of the following molecules from least → most permeable.

Acetamide → Urea → Butyramide.

Urea → Acetamide → Butyramide.

Butyramide → Acetamide → Urea.

Acetamide → Butyramide → Urea.

Urea → Butyramide → Acetamide.

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Verified step by step guidance

Understand that transmembrane diffusion is influenced by the size and polarity of the molecules. Smaller and less polar molecules generally diffuse more easily through the lipid bilayer.

Examine the structures of the molecules: Acetamide (CH3CONH2), Butyramide (C3H7CONH2), and Urea (CH4N2O). Note that Butyramide has a longer carbon chain compared to Acetamide, making it larger and less polar.

Consider the polarity of the molecules. Urea, with two amine groups, is more polar than Acetamide and Butyramide, which have one amide group each.

Rank the molecules based on size and polarity: Urea is the smallest and most polar, Acetamide is intermediate, and Butyramide is the largest and least polar.

Conclude that the order of permeability from least to most is: Urea (most polar and smallest) → Acetamide (intermediate) → Butyramide (least polar and largest).