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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

17. Mutation, Repair, and Recombination

DNA Repair

Genetics

17. Mutation, Repair, and Recombination

DNA Repair

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Multiple Choice

The separated strands of DNA are completed into two double helices by DNA _________.

polymerase

topoisomerase

ligase

helicase

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Verified step by step guidance

Understand the role of each enzyme listed in the options in DNA replication and repair processes.

Recall that DNA helicase is responsible for unwinding and separating the two strands of the DNA double helix.

Recognize that DNA polymerase is the enzyme that adds complementary nucleotides to each separated strand, synthesizing new DNA strands and completing the double helices.

Note that DNA ligase is involved in joining Okazaki fragments on the lagging strand, not in synthesizing new strands.

Identify that topoisomerase helps relieve the tension caused by unwinding DNA but does not synthesize new strands.