DNA Repair Mechanisms

Question 1

Polymerase proofreading

Answer 1

DNA polyermase while replicating has proofreading abilities to check

Question 2

Direct Repair

Answer 2

repairs dimers by using DNA photolyase to fix pyrimidine dimer to break bond and absorb light

OR: using methylguanine methyltrasnferase to more the methyl from G–C when it doesn’t belong there

Question 3

Base excision repair

Answer 3

replaces the wrong base, for non-ioninzing/non-distorting repairs uusing DNA Glycosylase

Question 4

nucleotide exision repair

Answer 4

changes the entire nucleotide in distorting change using the NER complex

Question 5

mismatch

Answer 5

fixes the mismatched pair in teh daughter cell, this is dangerous due to the misfolding of the DNA causing a deformity

Question 6

recombination

Answer 6

breaks the double strand or inner strand caued by crosslinking by ionizing radiation

Question 7

non-homologous end joining

Answer 7

cuts cross linking out and just puts them back together, could be missing DNA

Question 8

homologous end joining

Answer 8

you have the template to fix and fill in

Question 9

transcription coupled repair

Answer 9

will see RNA stalling and allow it to continue on