Fig. 1 illustrates cells from a plant tissue that were placed on a slide in distilled water and examined with a microscope. Fig. 2 illustrates cells from the same plant tissue after they had been placed on a slide in concentrated salt solution.
(a)[4]
Explain why the cells in Fig. 2 appear this way.
(b(i))[2]
Identify the structures labelled P and Q in Fig. 2.
(b(ii))[1]
State what is present in location R in Fig. 2.
(b(iii))[3]
The concentrations of substances in structure Q are not the same as those in location R. Explain how the features of structure P lead to differences in the concentrations of substances in Q and R.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “membrane or P / cytoplasm or Q moving away from wall” …