A-LevelBiologyCell membranes and transportOct/Nov 2019Paper 2 Q36 Marks
A student carried out an experiment to investigate the effect of increasing the concentration of sucrose solution on the mass of potato tissue. • Potato tissue was cut into cylinders of equal length and diameter. • The mass of each cylinder was recorded. • Each cylinder was put into a solution of sucrose, as shown in Fig. 3.1. [Figure 3.1] • After one hour each cylinder was removed, blotted dry and reweighed. • The percentage change in mass of each cylinder was calculated. • The experiment was repeated three times. • The mean percentage change in mass of the potato cylinders in each sucrose solution was calculated. Fig. 3.2 shows the results of this investigation. [Figure 3.2]
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