Genetics DNA I: The genetic material by Nathan H Lents, Ph.D. Reading Quiz Teach with this In the late 19th and early 20th century, most scientists believed that ________ was the genetic material because it offers more potential complexity. carbohydrate protein DNA lipid Frederick Griffith made his important observations about "transformation" while attempting to develop a vaccine against which pathogenic organism? E. coli bacteriophage HIV S. pneumoniae When Frederick Griffith coined the term "transformation," this was in reference to the genetic re-programming of strains of bacteria. laboratory mice. patients with pneumonia. bacteriophages. In the famous Avery, MacLeod, and McCarty experiment, the tube that was treated with _______ resulted in the destruction of the "transforming material." lipase RNase DNase protease The Hershey and Chase experiment served as powerful independent confirmation that DNA was indeed the genetic material. They made their discovery using which type of organism? S. pneumoniae mice strains of bacteria bacteriophage As determined by Frederick Griffith's experiment, when DNA is "transformed" its structure completely changes. it produces a slightly different organism. its structure does not change at all. it produces a pathogenic organism. After Griffith's results were made known, scientists all over the world began to repeat his experiment in slightly different ways. Which statement BEST explains why that happened? The scientific community did not trust Griffith's results. Scientists wanted to build on and extend his research. Scientists in different countries were competing to prove Griffith wrong. Scientists wanted to create new forms of S. pneumoniae. Score Quiz