In order to repair damage to one of the two paired molecules of DNA, there exist a number of excision repair mechanisms that remove the damaged nucleotide and replace it with an undamaged nucleotide complementary to that found in the undamaged DNA strand.
Depending on the type of Quicken program used and the document(s) created, Quicken files can have one of several different extension types. The most common Quicken file extensions are the following: .qdf, .qsd, .qel, .qph.ata files in Quicken end with the file extension .QDF, and this is another way to search for your Quicken data files....
MicroStation files can actually have any extension, however it is recommended that you use the .DGN for consistency and standardization. MicroStation also uses cell library files to store standard cells, similar to blocks in AutoCAD. A cell library file uses a .CLE extension by default, but the format of this file is identical to that of a .DGN file. The .CLE extension is used to differentiate it from the other file type. Another important file type for you to learn is the DGN library file. A DGN library file uses the .DGBLIB file extension, and as with the others, it's format is identical to the DGN file format. Again, the .DGNLIB extension is used to differentiate it from other file types.