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

2. Molecular Representations

Functional Groups

Organic Chemistry

2. Molecular Representations

Functional Groups

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Multiple Choice

Which of the following functional groups is present in the TATA box sequence of DNA?

Hydroxyl group

Carboxyl group

Methyl group

Amino group

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Verified step by step guidance

Understand the context: The TATA box is a DNA sequence found in the promoter region of genes in eukaryotes. It plays a crucial role in the initiation of transcription.

Identify the functional groups listed: Hydroxyl group (-OH), Carboxyl group (-COOH), Methyl group (-CH₃), and Amino group (-NH₂).

Recall the structure of DNA: DNA is composed of nucleotides, each containing a phosphate group, a deoxyribose sugar, and a nitrogenous base. The TATA box is rich in adenine (A) and thymine (T) bases.

Consider the chemical modifications: In the context of DNA, methylation often occurs on cytosine bases, but in the TATA box, the presence of a methyl group is significant in the regulation of gene expression.

Conclude the analysis: The TATA box sequence is associated with the presence of a methyl group, which is involved in the regulation of transcription initiation, making it the correct functional group in this context.