Looking for STEM projects and challenges for kids? Building and engineering projects are awesome for developing thinking skills and encouraging the ability to design and create. The tough part, though, is that teachers often have to purchase the materials at their own expense. At home, we don’t need to supply enough materials for a class, …
AP Biology, Experiments Which Led to Our Current Knowledge of Molecular Biology
This is a great review worksheet for an AP Biology class reviewing early experiments that led to our current knowledge of molecular biology. It includes a student chart with an answer key that provides information on Morgan, Griffith, Hershey and Chase, Chargaff, Watson and Crick, Meselson and Stalh, and Beadle and Tatum.
Frederick Griffith (1877–1941) was a British bacteriologist. In January 1928 he performed "Griffith's Experiment", demonstrations of bacterial transformation, whereby a bacterium distinctly changes its form and function. He showed that Streptococcus pneumoniae, implicated in many cases of lobar pneumonia, could transform from one #strain into another. The observation was attributed to an unidentified transforming principle or transforming factor. This was later identified as #DNA.