What is the major difference between the mechanisms of homology-directed repair, copy choice, and gene conversion...
What is the major difference between the mechanisms of homology-directed repair, copy choice, and gene conversion in DNA repair?
Homework Answers
Homology directed repair (HDR) mechanism: The homologous recombination is the most common form of homology directed repair, which is used in the repair of double stranded lesions of DNA. The cell can use HDR mechanism only if it contains the homologous region of DNA, probably either in the G2 or S phase.
Copy-choice repair or copy-choice recombination mechanism: The new DNA molecule is formed by the replication of each selected parental DNA (or RNA) molecules (with alternative maternal and paternal copies).
Gene conversion is a mismatch repair mechanism in which one allele is replaced by another homologous allele (transfer is unidirectional from the donor to recipient), the allele may be of the same gene.
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What is the major difference between the mechanisms of
homology-directed repair, copy choice, and gene conversion...
Understand how non homologous end joining proteins and homology-directed repair work
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Molecular biology of the gene. From the paper “DNA repair mechanisms and the bypass of DNA...
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3. In general for methyltransferase a. b. What type of damage does it repair? How does it repair the damage? lanhy the damaged guanine woulr hymine nstead of eyriosine
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Part 1. Eukaryotes use at least two distinct mechanisms to control gene expression by altering the structure of chromatin around a particular gene. One of these mechanisms is the covalent modification of histones to switch DNA between an open and closed confirmation. A second mechanism is the covalent modification of DNA (typically on cytosines) by methylation. A. Describe a type of histone modification and explain what effect is has on chromatin, and how that effect is achieved. a. One type...
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What are the 4 forms of gene transfer in bacteria? What is the difference between horizontal and vertical gene transfer? What is gene transfer? How genes move between genomes of bacteria.by the processes of transformation, transduction, conjugation, and transposition? How can gene transfer (conjugation, transformation) contribute to bacteria becoming resistant to antibiotic drugs?
Molecular biology of the gene. From the paper “DNA repair
mechanisms and the bypass of DNA damage in saccaromyces cerevisiae”
3. In general for methyltransferase a. b. What type of damage does it repair? How does it repair the damage? lanhy the damaged guanine woulr hymine nstead of eyriosine
Part 1. Eukaryotes use at least two distinct mechanisms to control gene expression by altering the structure of chromatin around a particular gene. One of these mechanisms is the covalent modification of histones to switch DNA between an open and closed confirmation. A second mechanism is the covalent modification of DNA (typically on cytosines) by methylation. A. Describe a type of histone modification and explain what effect is has on chromatin, and how that effect is achieved. a. One type...
What are the 4 forms of gene transfer in bacteria? What is the difference between horizontal and vertical gene transfer? What is gene transfer? How genes move between genomes of bacteria.by the processes of transformation, transduction, conjugation, and transposition? How can gene transfer (conjugation, transformation) contribute to bacteria becoming resistant to antibiotic drugs?
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