The Hershey-Chase Experiments, in Which ³²P and ³⁵S Were Used

Multiple Choice

The Hershey-Chase experiments, in which ³²P and ³⁵S were used to label biological molecules, demonstrated ____.

A) the semiconservative nature of DNA replication
B) that harmless bacterial cells can be permanently and heritably transformed into lethal bacterial cells
C) that pure DNA extracted from disease-causing bacteria transformed harmless strains into killer strains
D) that bacteriophages transfer their DNA, but not their protein coats, to their host bacteria
E) that DNA content of a cell does not vary over time