Macromolecules review
Chapter 4: Carbon and the Molecular Diversity of Life 4 Major Macromolecules: Lipids Carbohydrates Nucleic Acid Protein Lipids Fat- a combination of a glycerol and three fatty acids also called a triglyceride Used for long term energy storage, which is located in the long carbon chains Phospholipid- a combination of a glycerol, two fatty acids and a phosphate group Makes up cell membrane (lipid bilayer) Selectively permeable Hydrophilic heads (the phosphate group) Hydrophobic tails Steroid- lipids with a structure of four fused rings General Information Glycerol is combined to fatty acid by an ester linkage (dehydration synthesis) Ester linkage is polar CH2 groups are nonpolar Saturated Fat- a triglyceride with only single bonds