Which of the following statements about sequence proofreading during DNA replication is false?

Which of the following statements about sequence proofreading during DNA replication is false?



(a) The exonuclease activity is in a different domain of the DNA polymerase.
(b) The exonuclease activity cleaves DNA in the 5'-to-3' direction.
(c) The DNA proofreading activity occurs concomitantly with strand elongation.
(d) If an incorrect base is added, it is "unpaired" before removal.


Answer: B


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