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Question 19N.3.SL.TZ0.d

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Date November 2019 Marks available [Maximum mark: 2] Reference code 19N.3.SL.TZ0.d
Level SL Paper 3 Time zone TZ0
Command term Explain Question number d Adapted from N/A
d.
[Maximum mark: 2]
19N.3.SL.TZ0.d

An experiment was carried out on osmosis in carrot (Daucus carota) root tissue and potato (Solanum tuberosum) tuber tissue. Similar sized pieces of tissue were cut and soaked in different sucrose solutions for 24 hours. The results are shown in the graph below.

Explain one reason for calculating the percentage change in mass.

[2]

Markscheme

a. the change in mass indicates whether the tissue has gained/lost water ✔

b. the pieces of tissue will not be the same mass «at the beginning of the experiment» ✔

c. to compare the relative changes in mass ✔

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