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

What characteristic of short tandem repeats (STRs) in DNA makes them useful for DNA fingerprinting?

They have a high mutation rate.

They are highly variable between individuals.

They are located in coding regions of the genome.

They are identical in all humans.

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Verified step by step guidance

Understand the concept of Short Tandem Repeats (STRs): STRs are sequences in DNA where a short nucleotide sequence is repeated multiple times in a row. The number of repeats can vary between individuals.

Recognize the significance of variability: The key characteristic of STRs that makes them useful for DNA fingerprinting is their high variability between individuals. This means that the number of repeats at a given STR locus can differ from person to person.

Consider the application in DNA fingerprinting: In DNA fingerprinting, multiple STR loci are analyzed to create a unique genetic profile for an individual. The variability in STRs allows for distinguishing between different individuals based on their DNA.

Clarify why other options are incorrect: STRs do not have a high mutation rate; they are not located in coding regions of the genome, and they are not identical in all humans. These characteristics would not contribute to their usefulness in DNA fingerprinting.

Conclude with the correct characteristic: The high variability of STRs between individuals is what makes them particularly useful for DNA fingerprinting, as it allows for the creation of unique genetic profiles.