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

17. Mutation, Repair, and Recombination

DNA Repair

Genetics

17. Mutation, Repair, and Recombination

DNA Repair

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 enzyme breaks the hydrogen bonds between the strands of parental DNA during DNA replication?

Helicase

DNA ligase

DNA polymerase

Topoisomerase

Previous problemNext problem

Verified step by step guidance

Understand the role of each enzyme listed in the context of DNA replication.

Recall that DNA replication involves unwinding the double helix to separate the two parental strands.

Identify that the enzyme responsible for breaking the hydrogen bonds between the complementary base pairs to separate the strands is the one that 'unzips' the DNA.

Recognize that Helicase is the enzyme that breaks the hydrogen bonds between the strands, allowing the replication fork to form.

Differentiate Helicase from other enzymes: DNA ligase joins Okazaki fragments, DNA polymerase synthesizes new DNA strands, and Topoisomerase relieves supercoiling tension.