(a) Who conducted the above experiment? [1]
(b) Name the radioactive elements used for labelling DNA and protein respectively. [1]
(c) Define the objective of the experiment. [1]

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Solution

a) Alfred Hershey and Martha Chase conducted the above experiment. [1 mark]

b) Radioactive isotope of Phosphorus 32P was used to label the DNA. [1/2 mark]
Radioactive 35S is used to label the proteins. [1/2 mark]

c) The objective of the experiment was to determine whether protein or DNA is the genetic material that was transferred when a bacteriophage infects an E. coli. [1 mark]

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