Helicase, Primase, DNA polymerase, Ligase, RNA polymerase, telomoerase.
2007-03-18 11:21:10 · 7 answers · asked by daoudi2287 1 in Science & Mathematics ➔ Biology
only ~DNA polymerase~ has proof-reading function.
DNA ligase can only seal two complementary strands of DNA. It can do it incorrectly, there is no proof-reading activity.
2007-03-18 11:30:40 · answer #1 · answered by pink 5 · 1⤊ 0⤋
The following site says: "RNA polymerase II (pol II) is an enzyme that, by itself, can unwind the DNA double helix, synthesize RNA, and proofread the result. "
http://www-als.lbl.gov/als/science/sci_archive/polymerase2.html
This web site says: "Most DNA polymerases have 3’ to 5’ exonuclease activities that allow polymerase to proofread."
http://www.msu.edu/course/lbs/149h/DNArep.html
This web site says: "DNA polymerase makes very few errors, and most of those that are made are quickly corrected by DNA polymerase and other enzymes that "proofread" the nucleotides added into the new DNA strand."
http://ircamera.as.arizona.edu/NatSci102/text/dnareplicate.htm
2007-03-18 18:28:12 · answer #2 · answered by ecolink 7 · 1⤊ 0⤋
DNA polymerase
2007-03-18 18:31:06 · answer #3 · answered by renolibrado 2 · 1⤊ 0⤋
DNA polymerase...
It has 3'-->5' exonuclease activity to remove nucleotides that are wronly incorparated on a replicating strand...
2007-03-19 03:00:44 · answer #4 · answered by lam_tensai 2 · 0⤊ 0⤋
I think it's the Ligase, but could be wrong. It's been 2 years since my last Bio class.
2007-03-18 18:24:51 · answer #5 · answered by F1reflyfan 4 · 0⤊ 0⤋
dna polymerase
2007-03-18 19:05:27 · answer #6 · answered by wesnaw1 5 · 0⤊ 0⤋
Ligase has a proof reading function.
2007-03-18 18:24:34 · answer #7 · answered by Geddy_V 2 · 0⤊ 1⤋