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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 components form the backbone of the DNA molecule?

Nitrogenous bases only

Fatty acids and glycerol

Alternating sugar and phosphate groups

Amino acids

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Verified step by step guidance

Recall the basic structure of a DNA molecule, which consists of a long chain of nucleotides.

Understand that each nucleotide is composed of three parts: a nitrogenous base, a sugar molecule (deoxyribose), and a phosphate group.

Identify that the backbone of the DNA strand is formed by the sugar and phosphate groups linked together through phosphodiester bonds.

Recognize that the nitrogenous bases extend from this sugar-phosphate backbone and pair with complementary bases on the opposite strand.

Conclude that the correct components forming the backbone of DNA are the alternating sugar and phosphate groups, not the nitrogenous bases or other molecules like fatty acids or amino acids.