lipids

• triglycerides are made of glycerol with three fatty acids attached.
• lipids form ester bonds
• phospholipids have phosphate molecule replacing one of the fatty acids
• lipids are found in the cell membrane as phospholipids and it adds flexibility to the membrane as well as it allows lipid soluble compounds to pass.
• lipids are waterproof, and insulating as they conduct heat very slowly. and fat are often stored around internal organs to protect them.
• the phosphate group (head) is hydrophilic
• fatty acids or the tail are hydrophobic
• testing for lipids uses an emulsion test
• if there was cloudy white color then the sample contains lipids