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

Organic Chemistry Reactions

Organic Chemistry

3. Acids and Bases

Organic Chemistry Reactions

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Multiple Choice

In the context of organic chemistry reactions, why is the clear area surrounding an antibiotic disk called the zone of inhibition?

It shows the region where the antibiotic has been neutralized by enzymes.

It marks the area where bacteria have developed resistance to the antibiotic.

It represents the zone where the antibiotic has evaporated.

It indicates the area where the antibiotic has successfully killed bacteria.

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Verified step by step guidance

Understand the concept of the 'zone of inhibition': In microbiology, the zone of inhibition is a clear area surrounding an antibiotic disk on an agar plate, indicating the effectiveness of the antibiotic against bacteria.

Recognize the purpose of the antibiotic disk: The disk contains a specific concentration of an antibiotic, which diffuses into the agar and inhibits bacterial growth in its vicinity.

Identify the correct interpretation of the clear area: The clear area, or zone of inhibition, is where bacterial growth has been prevented due to the antibiotic's action, not because of neutralization, resistance, or evaporation.

Eliminate incorrect options: The zone of inhibition does not indicate neutralization by enzymes, resistance development, or evaporation of the antibiotic, as these would not result in a clear area.

Conclude with the correct explanation: The zone of inhibition indicates the area where the antibiotic has successfully killed or inhibited the growth of bacteria, demonstrating its effectiveness.