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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

Which of the following base pairs would be targeted and repaired by a mismatch repair system?

C-G

T-A

A-T

G-T

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Verified step by step guidance

Understand that the mismatch repair system targets base pairs that are incorrectly paired, meaning the bases do not follow the standard Watson-Crick base pairing rules.

Recall the normal base pairing rules: Cytosine (C) pairs with Guanine (G), and Adenine (A) pairs with Thymine (T). So, correct pairs are C-G and A-T (or T-A).

Identify that pairs like G-T do not follow these standard rules and represent mismatches that can occur during DNA replication or due to damage.

Recognize that the mismatch repair system scans the DNA for such incorrect pairs (e.g., G-T) and initiates repair to restore the correct base pairing.

Conclude that among the options given, the mismatch repair system would target the G-T pair because it is a mismatch, unlike the correctly paired C-G, T-A, or A-T.