Question 1
The classic Hershey and Chase (1952) experiment that offered evidence in support of DNA being the genetic material in bacteriophages made use of which of the following labeled component(s)?
◦ hydrogen
◦ phosphorus and sulfur
◦ nitrogen and oxygen
◦ tritium
◦ None of the answers listed is correct.
Question 2
In the classic experiment conducted by Hershey and Chase, why was the pellet radioactive in the centrifuge tube that contained bacteria with viruses?
◦ The radioactive viruses (coats plus DNA) were in the pellet.
◦ The radioactive protein coats of the viruses were in the pellet.
◦ The radioactive viruses were in the pellet, and the bacteria were in the supernatant.
◦ The bacteria were in the pellet, and they had incorporated radioactive proteins into their cell membranes.
◦ The bacteria were in the pellet, and many contained the radioactive viral DNA.
An example of an experiment that supported Beadle and Tatum's one gene
Classic Iphone
Schematic Diagram of the fluidized bed for the experiment (CHE415 Unit Operations)
An Example of an Electrical Stimulation Experiment
Radioactive waste
Experiment: Response to Auxin