Three biological molecules found in cell surface membranes are described below. • X is a molecule made up of carbon, hydrogen and oxygen, with a non-polar part and one section that projects from the membrane and is able to form hydrogen bonds. • Y is a molecule with a hydrophilic end that forms hydrogen bonds with the water outside the membrane, and a hydrophilic part that lies within the cell membrane. • Z is a molecule that can arrange itself in the membrane because it has a hydrophilic region at one end and two hydrophobic extensions located within the membrane. Which row correctly identifies a carrier protein and a glycolipid?
- Acarrier protein: X; glycolipid: Z
- Bcarrier protein: X; glycolipid: Y
- Ccarrier protein: Z; glycolipid: Y
- Dcarrier protein: Y; glycolipid: X