In the Hershey and Chase experiment, phage-infected bacteria and viral progeny were radioactive following bacterial
infection with 32P-labeled viruses. Why?
a. Bacteria had incorporated radioactive proteins into their DNA.
b. Bacteria and viral progeny had incorporated 32P into their DNA.
c. Viral progeny had used the 32P to build new viral proteins.
d. Bacteria had incorporated radioactive proteins into their cell membranes.
e. 32P was left outside the cell during viral infection.
ANSWER: b
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