Which description applies to a carrier protein in cell surface membranes?
- Aa glycoprotein that is found on the outer surface of the membranes allowing cell recognition
- Ba glycoprotein that is involved in moving substances through the membranes by both active and passive transport
- Ca protein that allows the attachment of signalling molecules which brings about changes within the cell
- Da protein that is involved in moving substances through the membranes by passive transport through water-filled pores