BIL 150 Lecture Notes - Lecture 4: Nitrogenous Base, Adenosine, Pentose
Document Summary
Lipids: one big molecule, fats, phospholipids, and steroids, hydrophobic molecules, major function, energy storage, mammals store fat in adipose cells, adipose tissue also cushions vital organs and insulates. Unsaturated: one or more than one double bonds. Diet rich in saturated fats may contribute to cardiovascular disease through plaque deposits. Hydrogenation: converting unsaturated fats to saturated fats by adding hydrogens, vegetable oils creates unsaturated fats with trans double bonds. Omega 3 fatty acid: commonly found in marine and plant oils. Lipids characterized by carbon skeleton of 4 fused rings: cholesterol: component of animal cell membrane. Proteins: diverse structures, 50% of the dry mass of most cells, speed up chemical reactions, other protein functions include defense(antibodies), storage, transport, cellular transport, cellular communication, movement, or structural support. Polypeptides: polymers built from the same set of 20 amino acids, protein: 1 or more polypeptides.
