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amino acid molecules are water soluble meaning they cannot enter the cell. Fatty acid molecules CAN enter the cell.
Fatty acids are the building blocks of fats found in food and in the body of most organisms. They can differ in length and in degree of saturation.
To form a molecule of fat, the two types of molecules that are needed are glycerol and fatty acid. One glycerol molecule attaching itself to three molecules of fatty acid will give one molecule of fat.
lipid
It is 'hexanoic acid' or 'caproic acid'.
differ from what?
One glycerol molecule and three fatty acid molecule
a triglyceride
This is called the hydrophobic 'side' of the phospholipid molecule
To form a molecule of fat, the two types of molecules that are needed are glycerol and fatty acid. One glycerol molecule attaching itself to three molecules of fatty acid will give one molecule of fat.
eicosanoid
Fat is a fairly complicated compound: it is composed of a glycerin molecule with 3 fatty acid molecules attached. Each of the fatty acid molecules is composed of a carboxylic acid molecule and a hydrocarbon polymer molecule chain. The hydrocarbon polymer molecule chains can be of any length and either flexible or rigid. The hydrocarbon polymer molecule chains will likely be different in each of the 3 fatty acid molecules in a given fat molecule.