FireChat, the clever app that lets people talk to each other without using cell reception, just got an update that gives its users fixed handles. That might not mean a damn thing to you, which is understandable. FireChat doesn't have the name recognition of Snapchat.
This oxidative stress can directly damage DNA. It is the associated repairing of the oxidatively damaged DNA that sometimes fails, thus creating a mutation in the DNA. 3) Direct attachment of chemicals to DNA forming DNA Adducts.These 'adducts' must be removed from the DNA by DNA Repair mechanisms.t is the associated repairing of the oxidatively damaged DNA that sometimes fails, thus creating a mutation in the DNA. 3) Direct attachment of chemicals to DNA forming DNA Adducts. These 'adducts' must be removed from the DNA by DNA Repair mechanisms.
From Wikipedia, the free encyclopedia. DNA Polymerase I (or Pol I) is an enzyme that participates in the process of DNA replication. Discovered by Arthur Kornberg in 1956, it was the first known DNA polymerase (and, indeed, the first known of any kind of polymerase).It was initially characterized in E. coli and is ubiquitous in prokaryotes. A 3'â5' (reverse) exonuclease activity that mediates proofreading. 2  A 5'â3' (forward) exonuclease activity mediating nick translation during DNA repair. 3  A 5'â3' (forward) RNA-Dependent DNA polymerase activity.