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Question 18N.1.SL.TZ0.16

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Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.1.SL.TZ0.16
Level SL Paper 1 Time zone TZ0
Command term Deduce Question number 16 Adapted from N/A
16.
[Maximum mark: 1]
18N.1.SL.TZ0.16

The image shows the results of Griffith’s experiment with S and R strains of Streptococcus pneumoniae in mice (Mus musculus).

What is an explanation for the results?

A.  Mice vary in their resistance to bacteria.

B.  The R strain and S strain mated.

C.  R strain bacteria are more heat-stable than S strain.

D.  DNA was transferred from heat-killed S cells to R cells.

[1]

Markscheme

D

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