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| Description: Avery, MacLeod, and McCarty’s use of in vitro transformation to identify DNA as the most likely hereditary molecule. A purified extract from heat-killed SIII bacteria successfully transforms RII cells in the control experiment. Destruction of lipids and polysaccharides , proteins , or RNA does not affect transformation; however, destruction of DNA prevents transformationAvery, MacLeod, and McCarty’s use of in vitro transformation to identify DNA as the most likely hereditary molecule. A purified extract from heat-killed SIII bacteria successfully transforms RII cells in the control experiment. Destruction of lipids and polysaccharides , proteins , or RNA does not affect transformation; however, destruction of DNA prevents transformation Extract from heat-killed Slll bacteria . . Protease Control Lipids and ’ . added, RNase added, DNase added, no 5233302?“ pogzacrcgagades proteins RNA destroyed DNA destroyed y y destroyed Type RII added a Type Rll added a Type RII added a Type RII added a Type RII added J l l l l l 50 K“) a No lip 35, J J® @ No changes polysaccharides NO protein J0 @ Live type SIII No bacteria bacteria recovered recovered Conclusion: Transformation is not Conclusion: No transformation disrupted by the removal of lipids, occurs DNA is the hereditary polysaccharides, proteins, or RNA; molecule required for therefore, none of these is the transformation. transformation factor. Picture Stats: Views: 75 Filesize: 273.79kB Height: 1547 Width: 1648 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=49122 |