Bacteria Were Infected with Phages Labeled with 35S and Then

question 74

Multiple Choice

Bacteria were infected with phages labeled with 35S and then whirled in a food blender. Cells were then separated from the fluid medium supernatant. Which of the following would be true?

• A) No radioactivity would be detected in either cells or supernatant.
• B) The radioactivity would be found in the progeny phage particles if infection of the cells was allowed to continue.
• C) The supernatant fluid would contain most of the radioactivity
• D) The radioactivity would be found in the phage DNA within the infected cells

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