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1. Introduction to Genetics51m
2. Mendel's Laws of Inheritance3h 37m
3. Extensions to Mendelian Inheritance2h 41m
4. Genetic Mapping and Linkage2h 28m
5. Genetics of Bacteria and Viruses1h 21m
6. Chromosomal Variation1h 48m
7. DNA and Chromosome Structure56m
8. DNA Replication1h 10m
9. Mitosis and Meiosis1h 34m
10. Transcription1h 0m
11. Translation58m
12. Gene Regulation in Prokaryotes1h 19m
13. Gene Regulation in Eukaryotes44m
14. Genetic Control of Development44m
15. Genomes and Genomics1h 50m
16. Transposable Elements47m
17. Mutation, Repair, and Recombination1h 6m
18. Molecular Genetic Tools19m
- Genetic Cloning
  9m
- Methods for Analyzing DNA
  9m
19. Cancer Genetics29m
- Overview of Cancer
  21m
- Cancer Mutations
  7m
20. Quantitative Genetics1h 26m
21. Population Genetics50m
- Hardy Weinberg
  19m
- Allelic Frequency Changes
  31m
22. Evolutionary Genetics29m

7. DNA and Chromosome Structure

DNA Structure

Genetics

7. DNA and Chromosome Structure

DNA Structure

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Multiple Choice

Which of the following is a key structural difference between DNA and RNA?

DNA contains deoxyribose sugar, while RNA contains ribose sugar.

DNA is usually single-stranded, while RNA is usually double-stranded.

Both DNA and RNA contain the base thymine.

DNA contains the base uracil, while RNA contains the base thymine.

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Verified step by step guidance

Identify the sugar component in both DNA and RNA. DNA contains deoxyribose sugar, which lacks one oxygen atom compared to ribose sugar found in RNA.

Examine the strand structure of DNA and RNA. DNA is typically double-stranded forming a double helix, whereas RNA is usually single-stranded.

Look at the nitrogenous bases present in DNA and RNA. DNA contains adenine, thymine, cytosine, and guanine, while RNA contains adenine, uracil, cytosine, and guanine.

Understand that thymine is found only in DNA, and uracil replaces thymine in RNA, which is a key difference in their base composition.

Summarize the key structural differences: sugar type (deoxyribose vs ribose), strand number (double vs single), and base composition (thymine vs uracil).