Whereas old dependency theory was Marxist in presentation, but nationalist in orientation, seeking to combine a theory of class struggle with a nationalist âthird worldistâ ideology, the new dependency theory is institutionalist in its analysis and political orientation.
Griffith concluded that the type II-R had been transformed into the lethal III-S strain by a transforming principle that was somehow part of the dead III-S strain bacteria. Today, we know that the transforming principle Griffith observed was the DNA of the III-s strain bacteria. While the bacteria had been killed, the DNA had survived the heating process and was taken up by the II-R strain bacteria. The III-S strain DNA contains the genes that form the protective polysaccharide capsule.
Regional Science Resource Center 2 resistance (Amp R) gene codes for an enzyme (called Î²-lactamase), which is able to destroy ampicillin. Transformation is the process by which the genetic content of a cell is changed. In the case of bacterial. transformation, DNA is introduced into bacterial cells.Transformation occurs naturally among bacteria. that are able to conjugate, a form of mating, but this is rare.ells that do not carry this gene are able to grow on normal nutrient media, but not on nutrient media containing ampicillin, whereas cells that do carry the Amp R gene grow on both nutrient media and nutrient media plus ampicillin. Transformation is the process by which the genetic content of a cell is changed.