what best describes the structure of a phospholipid? a. a non polar molecule attached to fatty acid b. a glycerol molecule between two fatty acids c. a lipid molecule with polar head an tail d.a phosphate molecule joined to a fatty acid

Correct answer is d ( phosphate molecule joined to a fatty acid) . 

Explanation: The structure of a phospholipid molecule contains two hydrophobic tails of fatty acids and one hydrophilic head of phosphate moiety, jointed together by an alcohol or glycerol molecule [90]. Due to this structural arrangement, PLs form lipid bilayers and are a key component of all the cell membranes.

Phospholipids like to line up and arrange themselves into two parallel layers, called a phospholipid bilayer. This layer makes up your cell membranes and is critical to a cell's ability to function.

Phospholipids are unique and versatile molecules. They are of natural occurrence and the main components in cellular membranes. Arranged as a lipid bilayer, phospholipids play a significant role in the structure and functionality of biological membranes.