Biology 06:10 Paper 3 Movement in&out of cells RY Page 4 May/june 2016 Syllabus-0610 Paper 43 4 A student investigated the diffusion of substances through Visking tubing, an artificial membrane which has some of the properties of cell membranes. . The student made a bag of Visking tubing as shown in Fig. 4.1. top of syringe elastic band test-tube Visking bag starch solution bag filled with starch solution and placed into a test-tube of water waier knot 1 Fig. 4.1 The student added some iodine solution to the water in the test-tube. After 30 minutes at room temperature, the contents of the Visking bag were stained blue-black, but the water outside remained a yellow colour. (a) (i) Explain these results,​