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.
Students will be able to: Students will be able to explain how DNA is extracted from strawberries. Performance/Observations Performance Task(s): Students will perform DNA extraction experiment. Students will observe the formation of DNA globules while experimenting. Students will complete the DNA extraction worksheet.he salt in the buffering solution makes the DNA molecules stick together, and the salt also helps separate the proteins that are being released from the cells. Notes: Step 3: Ask students to place the cheesecloth over a 4 oz. plastic cup (you may have them use a funnel in the cup if you feel it is necessary).