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Questions and Answers
What is the main focus of DNA repair mechanisms discussed in the text?
What is the main focus of DNA repair mechanisms discussed in the text?
- Reversal of DNA base alterations
- Base excision repair
- Repair of double-strand breaks (correct)
- Correction of replication errors
Which repair mechanism can fix damaged bases or nucleotides specifically?
Which repair mechanism can fix damaged bases or nucleotides specifically?
- Mismatch repair
- Double-strand break repair
- Base excision repair (correct)
- Homologous recombination
In DNA repair, what is the purpose of the SOS system?
In DNA repair, what is the purpose of the SOS system?
- Correcting mismatched bases
- Reversing deaminated bases
- Reversing alkylated bases
- Error-prone repairs in case of extensive damage (correct)
Which mechanism can repair errors that occur during DNA replication?
Which mechanism can repair errors that occur during DNA replication?
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What distinguishes methyl-directed mismatch repair in DNA repair mechanisms?
What distinguishes methyl-directed mismatch repair in DNA repair mechanisms?
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Which system is involved in fixing breaks that occur in both strands of the DNA helix?
Which system is involved in fixing breaks that occur in both strands of the DNA helix?
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What is the outcome of nonhomologous end-joining mechanisms used to repair double-strand breaks?
What is the outcome of nonhomologous end-joining mechanisms used to repair double-strand breaks?
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