The diagram shows an experiment in which two different cell surface membranes were joined to form a single large membrane.
The outer surface of one membrane contained molecules of protein P and the outer surface of the other membrane contained molecules of protein Q.
The positions of the two proteins in each membrane were observed just before they were joined together and 1 hour after they were joined.
Which statements are correct?
1 This provides evidence for the fluid mosaic model of cell membranes.
2 This shows that proteins can move freely in cell membranes.
3 This shows that the membrane is fluid but the proteins are not.
1 )
1, 2 and 3
1 and 2 only
3 )
1 and 3 only
4 )
2 and 3 only
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