Posts: 1,252. Wales has the most castles per square miles; with the UK in general having many impressive structures, and interesting clan tales, if you're in the Scottish highlands. Also, Germany and Austria cannot be underestimated in this regard either, as Neuschwanstein is legendary.
The Mimivirus, a virus infecting Acanthamoeba polyphaga, was the largest DNA virus yet isolated (Claverie et al, 2006).
When a retrovirus infects a cell. 1  its molecules of reverse transcriptase are carried into the cell attached to the viral RNA molecules. 2  The reverse transcriptase synthesizes DNA copies of the RNA. 3  These enter the nucleus and are. 4  inserted into the DNA of the host.