Table of contents

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

RNA

Genetics

7. DNA and Chromosome Structure

RNA

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Multiple Choice

RNA molecules differ from DNA molecules because only RNA:

contains the nitrogenous base uracil instead of thymine

is always double-stranded

contains deoxyribose as its sugar

is found exclusively in the nucleus

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Verified step by step guidance

Step 1: Understand the basic structural differences between RNA and DNA molecules. Both are nucleic acids but differ in sugar, nitrogenous bases, and strand structure.

Step 2: Recall that DNA contains the sugar deoxyribose, while RNA contains ribose. This is a key chemical difference between the two.

Step 3: Identify the nitrogenous bases present in each molecule. DNA has adenine (A), thymine (T), cytosine (C), and guanine (G), whereas RNA has adenine (A), uracil (U), cytosine (C), and guanine (G). Note that RNA uses uracil instead of thymine.

Step 4: Consider the strand structure: DNA is typically double-stranded forming a double helix, while RNA is usually single-stranded.

Step 5: Recognize the cellular location: DNA is mostly found in the nucleus, while RNA can be found both in the nucleus and cytoplasm, so RNA is not exclusive to the nucleus.