9. Place the steps in a cycle of PCR (Polymerase Chain React…

9. Place the steps in a cycle of PCR (Polymerase Chain Reaction) in the correct order.    1.Annealing—Cool mix to allow primers to form hydrogen bonds with ends of target sequence 2.Extension—DNA polymerase adds free nucleotides to the 3′ end of each primer 3.Denaturation—Heat briefly to near boiling temp to separate DNA strands

5.  In the late 1950s, Meselson and Stahl grew bacteria in a…

5.  In the late 1950s, Meselson and Stahl grew bacteria in a medium containing heavy nitrogen (15N) and then transferred them to a medium containing lighter nitrogen (14N). Which of the results in figure below would be expected after one round of DNA replication in the presence of 14N?