BIO 181 ASU Unit 5 questions well answered

BIO 181 ASU Unit 5DNA as hereditary material- Griffith - correct answer Griffith worked with two strands of Streptococcus Pneumoniae. One virulent strand and 1 non virulent strand. Results of mouse test - correct answer Found that the benign strand + the heat killed virulent strand still killed the mouse. Griffith found that heat-killed virulent S. pneumonia cells could transform a nonvirulent rough strain into a smooth virulent strain. He called this transformation Is protein, DNA, or RNA responsible for the transformations ? - correct answer Avery, Macleod, and McCarty found out that DNA was the transforming factor. DNA is hereditary material Hershey and chase - correct answer looked at T2 infection of E coli. T2 attaches itself to the cell then injects it with its genetic information. use host cell machineary to direct production of the genes. Protein coat stays behind on outside of cell. found out that the viral genes conatin DNA, the viral coats consisted of protein. DNA is the genetic material DNA structure - correct answer its a linear polymer made up of nucleotides (monomers). Each nucleotide is made up of deoxyribose, phosphate group, nitrogenous base Major componenents - correct answer sugar-phosphate backbone and a series of nitrogen containing bases that project from the back bone. DNA goes in opposite directions it goes 5' to 3'. Phosphate at 5', OH at 3' Structure - correct answer Line up in opposite direction, anti paralle. Lets the nitrogeous bases of opposite strands fit together in pairs. The base pairs are held by hydrogen bonds meselson and stahl - correct answer grow ecoli in lots of nitrogen after many generations put it back in normal nitrogen and then seperate it by its density.