Question

the plasma membrane is mostly made of molecules that have hydrophilic heads and hydrophobic tails. these molecules are called __________.
multiple choice
glycoproteins
phospholipids
lipoproteins
glycolipids
proteoglycans

Explanation:

Phospholipids have a hydrophilic (water - loving) head and hydrophobic (water - fearing) tails. Glycoproteins are proteins with attached carbohydrate chains. Lipoproteins are complexes of lipids and proteins. Glycolipids are lipids with attached carbohydrate chains. Proteoglycans are proteins with a large number of attached glycosaminoglycan chains. The plasma membrane's main structural component with hydrophilic heads and hydrophobic tails is phospholipids.

Answer:

phospholipids