The proof reading during replication of a DNA molecule to eliminate a wrong in the elongating strand is brought about by _____________________.
A
The $$3'$$-exonuclease activity of DNA polymerase I and III
B
The $$5-3'$$ exonuclease activity of DNA polymerase II
C
The $$3'$$-endonuclease activity of DNA polymerase I and III
D
RNA polymerase
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Solution
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Correct option is A. The $$3'$$-exonuclease activity of DNA polymerase I and III
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