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

17. Mutation, Repair, and Recombination

DNA Repair

Genetics

17. Mutation, Repair, and Recombination

DNA Repair

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Multiple Choice

DNA methylation is a mechanism used by eukaryotes to do which of the following?

Repair double-strand breaks in DNA

Increase the rate of DNA replication

Regulate gene expression by silencing specific genes

Facilitate the removal of introns during mRNA processing

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Verified step by step guidance

Understand that DNA methylation involves the addition of a methyl group (CH3) to the DNA molecule, typically at cytosine bases in the context of CpG dinucleotides.

Recognize that DNA methylation does not directly participate in repairing double-strand breaks or increasing the rate of DNA replication, nor is it involved in the removal of introns during mRNA processing.

Recall that one of the primary roles of DNA methylation in eukaryotes is to regulate gene expression by modifying the accessibility of the DNA to transcriptional machinery.

Know that methylation of gene promoter regions often leads to gene silencing by preventing transcription factors from binding or by recruiting proteins that compact chromatin structure.

Conclude that DNA methylation is a key epigenetic mechanism used to silence specific genes, thereby regulating gene expression without altering the underlying DNA sequence.