The presence of the marker gene tells researchers that the transformation was successful. A sterile, enclosed dish with a layer of a jelly-like substance containing complete food requirements for growth of bacteria, other small organisms or cells. If the bacteria are well-spaced when they are introduced to the plate, each bacterium will produce a colony of bacteria. An organism capable of causing a disease. plasmid . A small, circular DNA molecule.
Bacteria can have plasmids in addition to the DNA of the main chromosome.
Foreign DNA can be added to plasmids. The modified plasmid then transports the DNA into a new cell. A large molecule composed of a linear sequence of amino acids. This linear sequence is a protein's primary structure. Further folding from interaction between sites in the secondary structure forms the tertiary structure of the protein.