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

DNA Structure

Genetics

7. DNA and Chromosome Structure

DNA Structure

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Multiple Choice

Which of the following statements correctly distinguishes DNA from RNA?

DNA contains the sugar deoxyribose, while RNA contains the sugar ribose.

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

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

DNA is found only in the cytoplasm, while RNA is found only in the nucleus.

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Verified step by step guidance

Step 1: Understand the structural differences between DNA and RNA. DNA (deoxyribonucleic acid) contains the sugar deoxyribose, whereas RNA (ribonucleic acid) contains the sugar ribose. The difference lies in the presence or absence of an oxygen atom on the sugar molecule.

Step 2: Examine the nitrogenous bases present in DNA and RNA. DNA contains the bases adenine (A), thymine (T), cytosine (C), and guanine (G). RNA contains adenine (A), uracil (U), cytosine (C), and guanine (G). Note that thymine is replaced by uracil in RNA.

Step 3: Consider the strand structure of DNA and RNA. DNA is typically double-stranded forming a double helix, while RNA is usually single-stranded, allowing it to fold into various shapes.

Step 4: Identify the cellular locations of DNA and RNA. DNA is primarily located in the nucleus of eukaryotic cells, while RNA is synthesized in the nucleus but functions mainly in the cytoplasm.

Step 5: Use these distinctions to evaluate the given statements and determine which correctly differentiates DNA from RNA based on sugar type, bases, strand structure, and cellular location.