What is the difference bet/w a plasmid and a recombinant plasmid?
A plasmid is a small circular piece of DNA that exists naturally in some bacteria. If it’s a recombinant plasmid, then it will contain DNA from another source. For example, if you wanted the E.coli to produce insulin, you could get the human gene for insulin production, cleave it out of the human DNA and splice it into a plasmid. Now you have recombinant DNA. What you originally put about transformation is correct. The term transformation means the bacteria take in DNA from an outside source. The plasmids and recombinant plasmids will transform into the E.coli bacteria, so some of the bacteria that have taken in the recombinant plasmid will now be able to produce insulin, or whatever protein you want it to produce by inserting the correct gene.