The diagram illustrates the fluid mosaic model of part of a cell surface membrane. What functions does each of the components labelled 1 to 3 have?
- A1 antigen; 2 chemical receptor; 3 allow lipid soluble molecules to pass through
- B1 barrier to polar molecules; 2 stabilise the membrane; 3 antigen
- C1 chemical receptor; 2 allow lipid soluble molecules to pass through; 3 regulate the fluidity of the membrane
- D1 stabilise the membrane; 2 control the fluidity of the membrane; 3 barrier to polar molecules