Table of contents

Skip topic navigation

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

Previous problemNext problem

Struggling with Genetics?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Which part of DNA carries genetic information?

The hydrogen bonds between strands

The sequence of nitrogenous bases

The sugar-phosphate backbone

The double helix shape

Previous problemNext problem

Verified step by step guidance

Understand that DNA is composed of several key components: a sugar-phosphate backbone, nitrogenous bases, hydrogen bonds, and its overall double helix structure.

Recognize that the sugar-phosphate backbone provides structural support but does not carry genetic information itself.

Know that hydrogen bonds connect complementary nitrogenous bases between the two DNA strands, stabilizing the double helix but not encoding information.

Focus on the sequence of nitrogenous bases (adenine, thymine, cytosine, and guanine) along one strand of DNA, as this sequence is what encodes genetic information.

Conclude that the order or sequence of these nitrogenous bases is the part of DNA that carries the genetic instructions used in the development and functioning of living organisms.