Saturated vs. Unsaturated vs. Polyunsaturated Fats due to type of carbon-carbon bonds in the fatty acid chains. Principle lipid component of biological membranes. Amphipathic molecule due to polar, hydrophilic phosphate group and nonpolar, hydrophobic fatty acid region. Major component of membranes 2. Energy stores 3.
Proteins have unique amino acid sequences as specified by genes.
Amino acids are linked together by Peptide bonds to form Peptides or Proteins. Proteins have several levels of structural organization. This 3-D shape is called the molecules conformation. Proteins can change 3D structure. These changes in 3D structure are important steps in physiological processes of transport, enzyme action and cytoskeletal adjustment.