genetic q - raheem

[ArchivalUser]

6. DNA replication is not perfect; a mistake is made for every 104 to 105 nucleotides added. However, there are proofreading enzymes that excise incorrect bases and insert the correct one. Which of the following enzymes proofread DNA?
A. DNA ligase

B. DNA gyrase

C. DNA Polymerase I and II

D. DNA Polymerase III

[ArchivalUser]

dd even DNA polymerase I has it.

[ArchivalUser]

All 3 PROCARIOTIC DNA polymerase have proof reading activity and remove mismatched nucleotides via 3' to 5' exonuclease activity .Only DNA plymerase I has 5' to 3' exonuclease activity which is used to exice and replace RNA primers and damaged DNA sequences.

[ArchivalUser]

please post the answer

[ArchivalUser]

...C.....FROM THE SOURCE