Table of contents

1. A Review of General Chemistry5h 5m
2. Molecular Representations1h 14m
3. Acids and Bases2h 46m
4. Alkanes and Cycloalkanes4h 17m
5. Chirality3h 39m
6. Thermodynamics and Kinetics1h 22m
7. Substitution Reactions1h 48m
8. Elimination Reactions2h 30m
9. Alkenes and Alkynes2h 9m
10. Addition Reactions3h 19m
11. Radical Reactions1h 58m
12. Alcohols, Ethers, Epoxides and Thiols2h 42m
13. Alcohols and Carbonyl Compounds2h 17m
14. Synthetic Techniques1h 26m
15. Analytical Techniques:IR, NMR, Mass Spect7h 3m
16. Conjugated Systems6h 13m
17. Ultraviolet Spectroscopy51m
18. Aromaticity2h 34m
19. Reactions of Aromatics: EAS and Beyond5h 1m
20. Phenols55m
21. Aldehydes and Ketones: Nucleophilic Addition4h 56m
22. Carboxylic Acid Derivatives: NAS2h 51m
23. The Chemistry of Thioesters, Phophate Ester and Phosphate Anhydrides1h 10m
24. Enolate Chemistry: Reactions at the Alpha-Carbon1h 53m
25. Condensation Chemistry2h 9m
26. Amines1h 43m
27. Heterocycles2h 0m
28. Carbohydrates5h 53m
29. Amino Acids4h 20m
30. Peptides and Proteins2h 42m
31. Catalysis in Organic Reactions1h 30m
32. Lipids 2h 50m
33. The Organic Chemistry of Metabolic Pathways2h 52m
34. Nucleic Acids1h 32m
35. Transition Metals6h 14m
36. Synthetic Polymers1h 49m

3. Acids and Bases

Acids and Bases

Organic Chemistry

3. Acids and Bases

Acids and Bases

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Multiple Choice

Which of the following statements correctly describes the difference between facilitated diffusion and regular diffusion in the context of acid-base transport across cell membranes?

Facilitated diffusion requires energy input, while regular diffusion does not.

Facilitated diffusion involves the use of transport proteins, while regular diffusion does not.

Facilitated diffusion can move substances against their concentration gradient, while regular diffusion cannot.

Facilitated diffusion is faster than regular diffusion due to the involvement of enzymes.

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Verified step by step guidance

Identify the key concepts: facilitated diffusion and regular diffusion. Facilitated diffusion involves the use of transport proteins to move substances across cell membranes, while regular diffusion does not involve proteins and occurs directly through the lipid bilayer.

Understand the energy requirements: Regular diffusion is a passive process that does not require energy input, as it relies on the natural movement of molecules from an area of higher concentration to an area of lower concentration. Facilitated diffusion is also passive and does not require energy, but it uses transport proteins to assist in the movement of molecules.

Consider the direction of movement: Regular diffusion moves substances down their concentration gradient (from high to low concentration). Facilitated diffusion also moves substances down their concentration gradient, but with the help of transport proteins.

Evaluate the role of transport proteins: In facilitated diffusion, specific transport proteins in the cell membrane assist in the movement of molecules that cannot easily pass through the lipid bilayer, such as ions or polar molecules. Regular diffusion does not involve these proteins.

Clarify the speed and involvement of enzymes: Facilitated diffusion can be faster than regular diffusion due to the specificity and efficiency of transport proteins, but it does not involve enzymes in the same way that enzymatic reactions do. The speed is due to the transport proteins, not enzymes.