answer the following regarding DNA repairmechanisms
What is \"direct repair\"? Give a couple of examples of theenzymes involved. Which one requires light and what kind ofmutation does it repair? Which one repairs bases with alkyl groupsattached? Which base is involved?
What is “nucleotide-excision repair”? What kinds of mutationscan it repair? In prokaryotes, what four key proteins are involvedand how did they get their names? What two enzymes areinvolved?
What is “mismatch repair”? What does it do? This system correctsmistakes that have been missed by the normal correction system thatoccurs during DNA replication. Which enzyme normally corrects thesemistakes during replication?
What source of DNA is usually used in “homologous recombinationrepair” to fix the mutated strand of DNA? During which parts of thecell cycle can this type of repair occur? HRR can also occasionallyoccur at other times, but the homologous regions may not beidentical. Why might that be the case?
What happens during “nonhomolgous end joining”? During whichpart of the process might some of the sequence be lost? When duringthe cell cycle can this type of repair occur?
