How did griffith determine that the s strain and not the r strain was pathogenic. Heating destroy...

How did griffith determine that the s strain and not the r strain was pathogenic. Heating destroys the virulence of S). Heating destroys the virulence of S (right). However, when he injected mice with heat-killed S strain bacteria (not lethal anymore), they lived. When he injected mice with S strain bacteria, the mice died. He called this the transforming principle (Figure 2). Mar 3, 2026 · Griffith’s Experiments Overview of Griffith’s Work Conducted experiments with pneumonia bacteria to understand the nature of genetic material. He used two strains of Streptococcus pneumoniae: a virulent strain (type III S, smooth) and a harmless strain (type II R, rough). Jan 21, 2026 · Griffith’s experiment laid the foundation for understanding genetic material and transformation. • Griffith was a doctor who studied pneumonia, and two different strains of a virus • One strain (S-strain) was pathogenic and the other strain (R-strain) was non-pathogenic • He injected S-strain into a rat, rat died. This transformation enabled the non-pathogenic R strain to become pathogenic. zmj uilf huddbp iawvu urobyy wlnjw yfai ynf cwgxsih mzux