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Question 19N.3.SL.TZ0.a

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

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.

Using the graph, estimate isotonic sucrose solutions for potato tissue and carrot tissue.

Potato:

Carrot:

[2]

Markscheme

potato: 0.26 mol dm–3 ✔ Allow a range of 0.22–0.32
carrot: 0.50 mol dm–3 ✔ Allow a range of 0.45–0.55 (Allow 1 max if no units or either unit is omitted)

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