NATS 1670 Study Guide - Lipid Bilayer, Phospholipid, Hydrophile

• School: York University
• Department: Natural Science
• Course: NATS 1670
• Professor: Motti Anafi

Document Summary

The cell theory: developed during the mid 1600"s with the discovery of microscopy. Scientists were able to see that all living organisms are made of cells (the basic building units of life: also able to see that new cells are created by old cells dividing into two. Prokaryotic cells: believe in open concept, everything takes place within the cytoplasm (ribosomes, genetic material all in the same place) All dna replication, transcription, etc. takes place within the nucleus. Separates the inside of a cell from the outside environment. Provides a surface on which chemical reactions occur: regulates the passage of materials in/out of cells, consists of both lipids and proteins, the fundamental structure of the membrane is the phospholipid bilayer, which is. Water (h2o: oxygen is slightly negatively charged, hydrogen is slightly positively charged, overall, the molecule carries no net charge. Most naturally occurring phospholipids form bilayers spontaneously when they are dispersed in water.