<P> Phospholipids are a class of lipids that are a major component of all cell membranes . They can form lipid bilayers because of their amphiphilic characteristic . The structure of the phospholipid molecule generally consists of two hydrophobic fatty acid `` tails '' and a hydrophilic `` head '' consisting of a phosphate group . The two components are joined together by a glycerol molecule . The phosphate groups can be modified with simple organic molecules such as choline . </P>
<P> Phospholipids are a class of lipids that are a major component of all cell membranes . They can form lipid bilayers because of their amphiphilic characteristic . The structure of the phospholipid molecule generally consists of two hydrophobic fatty acid `` tails '' and a hydrophilic `` head '' consisting of a phosphate group . The two components are joined together by a glycerol molecule . The phosphate groups can be modified with simple organic molecules such as choline . </P>
what is the hydrophilic portion of a phospholipid molecule
what is the hydrophilic portion of a phospholipid molecule
a hydrophilic `` head '' consisting of a phosphate group
a hydrophilic `` head '' consisting of a phosphate group