BIO 311C Lecture Notes - Lecture 9: Activation Energy, Lipid Bilayer, Kinetic Energy
Document Summary
Atp (adenosine triphosphate) is the cell"s energy "currency" energy "transfers" w/ this phosphate energy is released from atp when terminal bonds break provides energy by phosphorylation, transferring the terminal phosphate group to another molecule third phosphate is phosphorylyzed. Phosphorylation is the addition of a phosphate group (po4. Many enzymes and receptors are switched on or o by phosphorylation and dephosphorylation, causing them to become activated or deactivated. Electrogenic pump (h+ pump) generates voltage across a membrane. Cotransport: occurs whena ctive transport of a solute indirectly drives transport of another solute. Bulk transport: tranport of large proteins across plasma membrane. Small molecules and water enter or leave the cell thrru the lipid bilayer or by transport proteins. Large molecules, such as polysaccharides and proteins, cross the membrane via vesicles. Transport vesicles migrate to the plasma membrsane, fuse w/ it, and release their contents. Many secretory cells use exocytosis to export their products.
