5
Complete the table below and then plot a graph to show the effect of salt
concentration on percentage of red blood cells plasmolysed (4)
Salt concentration Number of red blood cells Percentage of red blood cells
(gdm)
plasmolysed /87
destroyed by haemolysis (%)
0.0
87
0.5
87
1.0
87
1.5
87
2.0
0 0 0 0 0
87
2.5
83
3.0
80
3.5
74
4.0
62
4.5
42
5.0
23
5.5
8
6.0
0