DNA Genetic Coding and Cell Regulation Is Now Understood to Be

DNA genetic coding and cell regulation is now understood to be incredibly important to every cell among organisms, and is also associated with viruses. Through the early and mid 1900s, scientists developed new molecular analysis methods that changed the foundations of how we understand "life" to function. Normal health and homeostasis, as well as disease, and natural variations in form and function among organisms are now better understood. Medical and biological applications have increased dramatically with the understanding of DNA molecule structure, and it is helpful to have recognition of the scientists and sequence of events contributing to our understanding.
-The technique that allowed Hershey and Chase to show that the bacteriophage injects a specific molecule,was to

A) apply X-ray diffraction to detect whether protein or DNA was injected into a bacterium.
B) tag both DNA and protein with radioactive markers, to identify which was injected into a bacterium.
C) tag DNA in the virus with radioactive phosphorus, to identify if it as injected into a bacterium.
D) apply heat to the polysaccharide of the bacterium, then determine if protein or DNA was responsible for infection.
E) tag protein with radioactive sulfur, to identify if it was injected into a bacterium.