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

1. A Review of General Chemistry

Intro to Organic Chemistry

Organic Chemistry

1. A Review of General Chemistry

Intro to Organic Chemistry

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Multiple Choice

In the context of organic chemistry, how does a molecular clock allow scientists to study evolutionary history?

By measuring the rate of radioactive decay in organic compounds.

By analyzing the changes in DNA sequences over time to estimate the timing of evolutionary events.

By comparing the structural similarities of proteins across different species.

By determining the half-life of carbon isotopes in fossilized remains.

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Verified step by step guidance

Understand the concept of a molecular clock: A molecular clock is a method used to determine the time of evolutionary events based on the rate of genetic mutations. It relies on the assumption that mutations accumulate at a relatively constant rate over time.

Recognize the role of DNA sequences: Scientists analyze changes in DNA sequences to estimate the timing of evolutionary events. By comparing genetic differences between species, they can infer how long ago two species diverged from a common ancestor.

Differentiate from radioactive decay: Unlike methods that measure radioactive decay, such as carbon dating, molecular clocks focus on genetic changes rather than isotopic decay rates.

Consider protein structural similarities: While comparing protein structures can provide insights into evolutionary relationships, molecular clocks specifically use genetic sequence data rather than structural comparisons.

Understand the limitations and applications: Molecular clocks are useful for studying evolutionary history, but they require calibration with known evolutionary events and can be affected by varying mutation rates across different organisms.