Table of contents

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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 nitrogenous bases is found in DNA but not in RNA?

Cytosine

Adenine

Thymine

Uracil

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Verified step by step guidance

Understand the basic structure of nucleic acids: DNA and RNA are both made up of nitrogenous bases, sugars, and phosphate groups.

Recall that DNA contains four nitrogenous bases: Adenine (A), Thymine (T), Cytosine (C), and Guanine (G).

Recall that RNA contains four nitrogenous bases as well, but instead of Thymine, it has Uracil (U) paired with Adenine.

Identify which base is unique to DNA by comparing the bases listed: Cytosine and Adenine are found in both DNA and RNA, Uracil is found only in RNA, and Thymine is found only in DNA.

Conclude that Thymine is the nitrogenous base found in DNA but not in RNA.