Published on March 5, 2014
8.1 Identifying DNA as the Genetic Material KEY CONCEPT DNA was identified as the genetic material through a series of experiments.
8.1 Identifying DNA as the Genetic Material Griffith finds a ‘transforming principle.’ • Griffith experimented with the bacteria that cause pneumonia. • He used two forms: the S form (deadly) and the R form (not deadly). • A transforming material passed from dead S bacteria to live R bacteria, making them deadly.
8.1 Identifying DNA as the Genetic Material Avery identified DNA as the transforming principle. • Avery isolated and purified Griffith’s transforming principle. • Avery performed three tests on the transforming principle. – Qualitative tests showed DNA was present. – Chemical tests showed the chemical makeup matched that of DNA. – Enzyme tests showed only DNA-degrading enzymes stopped transformation.
8.1 Identifying DNA as the Genetic Material Hershey and Chase confirm that DNA is the genetic material. • Hershey and Chase studied viruses that infect bacteria, or bacteriophages. – They tagged viral DNA with radioactive phosphorus. – They tagged viral proteins with radioactive sulfur. • Tagged DNA was found inside the bacteria; tagged proteins were not.
Fig. 1 F shows the gene ral appear ance of a doub le-bal loon end osc op y ... The view obt ai ned covers 140° – 17 0° at 8 ... devic e, whi ch ...
Final Order Nov. 8, ... Wife Lena b. 15 January 1882 Visope Litovsk Russia; 3 ch: ... To US from Gettenberg, Sweden to NY 1 April 1894 on SS Majestic; ...
rev tst dtd 1/21/97 ... dtd september 8,1994 jeanne t spring trustee the jerome & anne c fisher ... ch 06612 robert lemle 7 grace drive
... fl 33431 235 garth road 235 garth road dtd 8/1/2005 3030 ... de zoete wedd sec ltd barclaytrust ... trustee ch-4002 basle ch ...
arthur j ohnson and mary j ohnson trust dtd 8/1/2005 ... barclays de zoete wedd sec ltd 2swan ... credit suisse basle st alben-graben 1-3 ch ...
1 n shore rdabsecon, nj 08201 usa ... 8 s morris aveatlantic city, nj 08401 usa ... gettenberg & wellisch llc
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