Final Exam Review, Section 2 Bio 190, Section 2 Spring 2001 Study Guide Outline for chapters 3-10. Four covalent bonds form a tetrahedron shape. In biological molecules the other molecules are carbon compounds. Mono, di and tri glycerides. Diglycerides plus a phosphate group on an end carbon that is linked to an organic molecule such as choline.
Phospholipids have a non polar hydrophobic tail and a polar head.
They are amphipathic. Cell phospholipids become more unsaturated to prevent them from becoming more solid. Saturated fatty acids in phospholipids makes them more solid. Example animal fat. Think about how his might relate to plants or animals that must experience a wide range of temperatures.