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

In the structure of DNA, what type of bonds hold the base pairs together?

Hydrogen bonds

Peptide bonds

Ionic bonds

Covalent bonds

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Verified step by step guidance

Recall the structure of DNA, which consists of two strands forming a double helix, with nitrogenous bases pairing in the center.

Understand that the bases pair specifically: adenine (A) pairs with thymine (T), and guanine (G) pairs with cytosine (C).

Identify the type of bond that connects these complementary bases across the two strands, which must be strong enough to hold the strands together but weak enough to allow separation during replication.

Recognize that these bonds are hydrogen bonds, which are weaker than covalent bonds but essential for the stability and flexibility of the DNA double helix.

Differentiate hydrogen bonds from other bond types such as peptide bonds (which link amino acids), ionic bonds, and covalent bonds (which form the backbone of DNA).