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#Question id: 3796


Incorrect pairing of bases during bacterial DNA replication occurs about once every 10^5 to 10^6 nucleotides, but the spontaneous mutation rate is only one error in 10^9 base pairs. What accounts for the difference?

#XL - Q Biochemistry
  1. proofreading and correcting by the DNA polymerase

  2. mismatch repair following replication

  3. both (a) and (b)

  4. neither (a) nor (b)


Answer:- Option(s): 3


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