BIO120H1 Lecture Notes - Lecture 2: Short-Chain Fatty Acid, Lipid Bilayer, Carboxylic Acid
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BIO120H1 Full Course Notes
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Document Summary
Physiology day 2 cell i: membranes, forces. Important roles of proteins in cells: make up almost all enzymes( though many have non-protein components, form the cytoskeleton and the extracellular matrix. Proteins are made up of 20 amino acids that can be strung together in infinite ways. The blueprint for proteins is in dna, which is transcribed to rna and then translated to form the appropriate proteins at the right time. Stabilized through hydrogen bonds between the c=o of one amino acid and the n-h of the amino acid four positions down the chain. Also stabilized when opposing side chains interact with those on amino acids 3 or 4 positions away such as hydrophobic interactions between two aromatic side groups or electrostatic interactions between a negative and positive group: -sheet. Class of hydrophobic organic molecules including fatty acids, triglycerides, phospholipids, steroids, and steroid derivatives. Roles in animal cells: substrate for energy production, building blocks for membranes, signaling molecules.
