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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

In the DNA double helix, which type of bond holds the two complementary strands together?

Hydrogen bonds

Disulfide bonds

Ionic bonds

Phosphodiester bonds

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Verified step by step guidance

Understand the structure of the DNA double helix: it consists of two complementary strands made up of nucleotides.

Recall that the backbone of each DNA strand is held together by phosphodiester bonds, which connect the sugar and phosphate groups within a single strand.

Identify the type of bond that connects the two strands to each other, which must allow for the strands to separate during processes like replication and transcription.

Recognize that the complementary nitrogenous bases (adenine-thymine and guanine-cytosine) on opposite strands pair through hydrogen bonds.

Conclude that hydrogen bonds are the specific type of bond responsible for holding the two complementary DNA strands together.