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

34. Nucleic Acids

Intro to Nucleic Acids

Organic Chemistry

34. Nucleic Acids

Intro to Nucleic Acids

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Multiple Choice

On which of the following DNA strands will UV light have the most effect?

A strand with a high concentration of cytosine bases

A strand with a high concentration of adenine bases

A strand with a high concentration of guanine bases

A strand with a high concentration of thymine bases

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Verified step by step guidance

Understand the effect of UV light on DNA: UV light can cause damage to DNA by inducing the formation of pyrimidine dimers, primarily affecting thymine and cytosine bases.

Identify the bases susceptible to UV-induced damage: Thymine and cytosine are pyrimidine bases, and UV light can cause them to form dimers, disrupting the DNA structure.

Consider the types of bases in the given options: Adenine and guanine are purine bases, which are less susceptible to UV-induced dimer formation compared to pyrimidine bases.

Evaluate the strand with the highest concentration of thymine bases: Since thymine is a pyrimidine base, a strand with a high concentration of thymine bases will be more affected by UV light due to the potential for dimer formation.

Conclude that the strand with a high concentration of thymine bases will have the most effect from UV light exposure, as thymine dimers are a common form of UV-induced DNA damage.