biology 1406 exam 5 Questions and Answers with complete solution

In 1928, __________ was surprised to find that when he killed pathogenic bacteria, then mixed the bacterial remains with living harmless bacteria, some living bacterial cells became pathogenic. - Frederick Griffith In 1952, ___________ used bacteriophages to show that DNA is the genetic material of T2, a virus that infects the bacterium Escherichia coli (E. coli). - Hershey-Chase __________ are viruses that infect bacterial cells. - Bacteriophages ______ discovered the relationships between DNA bases - Erwin Chargaff ______ Discovered the basic structure of DNA by x-ray crystallography - Rosalind Franklin ______ Built the first accurate model of a DNA molecule - James Watson and Francis Crick The sugar in DNA is - deoxyribose. The sugar in RNA is - ribose Pyrimidines - c,t and u Purines - a and gSides of DNA are_______ - sugar and phosphate backbone Rungs of a DNA are - nitrogenous bases A=T - 2 Hydrogen bonds