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Question 18M.2.HL.TZ2.2b.ii

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Date May 2018 Marks available [Maximum mark: 3] Reference code 18M.2.HL.TZ2.2b.ii
Level HL Paper 2 Time zone TZ2
Command term Outline Question number b.ii Adapted from N/A
b.ii.
[Maximum mark: 3]
18M.2.HL.TZ2.2b.ii
(b.ii)

Outline how Hershey and Chase’s experiment provided evidence for DNA as the genetic material.

[3]

Markscheme

a. experiment is meant to determine whether DNA or protein is the genetic material 

b. viruses/bacteriophages grown in radioactive S/S35 which enters the protein coat 

c. viruses/bacteriophages grown in radioactive P/P32 which enters the DNA 

d. «radioactive» viral DNA entered the bacterial cell during infection
OR
«radioactive» viral protein did not enter the bacterial cell during infection

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