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

Biology & Microbiology

You might also like to view...

Functions of the cytoskeleton include all of the following EXCEPT ____

a. sperm motility b. amoeboid motion c. skeletal muscle contraction d. cell division e. autophagy

Biology & Microbiology

Consider a living plant cell in a living leaf that is not wilted. The solute potential (?S) of such a cell

____ than that in the fluids surrounding the cell.

a. is typically lower b. varies widely from higher to lower c. is typically higher d. is typically about the same as e. is typically less negative

Biology & Microbiology

Plasma membrane glycolipids are found

a. exclusively in the inner leaflet. b. exclusively in the outer leaflet. c. equally distributed between the inner and outer leaflets. d. only on the basal surface of epithelia.

Biology & Microbiology

Which of the following is NOT a natural means of DNA recombination?

A) Viral infection B) Transformation in bacteria C) PCR D) Sexual reproduction

Biology & Microbiology