No, they are called phospholipids because they are made of lipids and phosphate group. Most phospholipids contain a diglyceride, a phosphate group, and a simple organic molecule such as choline.
protein
No, keratin is protein No, keratin is protein
A phospholipid attached to a carbohydrate (sugar) chain is called a Glycolipid. -A protein attached to a carbohydrate is called a Glycoprotein.
Actiually, hemoglobin is a protein that carries oxygen throughout your body.
Osmosis moves water molecules across the phospholipid bilayer of a cell membrane. Protein channels help facilitate the movement of water and other molecules by providing a pathway through the membrane.
It depends on which lipid bilayer you're talking about. There is the phospholipid bilayer that surrounds eukaryotic cells, cholesterol phospholipid bilayers, protein lipid bilayers, phase transition lipid bilayer, lipid bilayer membrane...
A protein that forms an ion channel through a membrane is most likely to be a transmembrane protein. Transmembrane proteins span the lipid bilayer, allowing them to create channels for ions to pass through the membrane. Peripheral proteins are typically found on the surface of the membrane and do not form channels.
Protein Molecules
moecules passing accross the phospholipid bilayer, AGIANST the graient because the carrier protein is using ATP to do this e.g. glucose
Phospholipid head and protein
Membrane proteins.
I'm not sure what your question is asking - if you mean what waterproofs cells in general, it's the phospholipid bilayer. In cells, the phospholipid bilayer has a hydrophobic (water hating) tail, pointed inwards, and a hydrophillic head (water loving) head on the outside.