Cataracts Facts. 1  Cataracts are changes in clarity of the natural lens inside the eye that gradually degrade visual quality. The natural lens sits behind the colored part of the eye (iris) in the area of the pupil, and cannot be directly seen with the naked eye unless it becomes extremely cloudy.
Hershey and Chase. Alfred Hershey and Martha Chase did an Experiment in 1952 that was called the Hershey-Chase Experiment. This experiment set out to determine what composed the genetic material of a bacteriophage. A bacteriophage is a virus that infects a bacterium.
6 Responses. 1  Lovely one. 2  Lovely write-up but i need to know the precautions taken or adopted by hershey and chase in the course of their experiment. 3  lovely one, i love you write -up but i want to know the precuations taken or adopted by hershey and chase in the cost of this experiment.