This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: STRUCTURES INTERNAL TO THE CELL WALL 1. PLASMA (CYTOPLASMIC) MEMBRANE-----lies inside the cell wall and encloses the cytoplasm. a. Consists of phospolipids and proteins. Phospholipids form a bilayer that consists of 2 layers of phospholipid molecules. A phospholipid molecule looks like this: Head-polar and water soluble, hydrophilic (glycerol + phosphate) 2 tails, non-polar, hydrophobic, not water soluble (fatty acids) They line up like this to form the phospholipid bilayer: b. Membrane proteins are placed in 2 groups 1) Peripheral proteins---loosely attached to the inner or outer surface of the membrane. Some are enzymes and some give support to the membrane. These are easily removed. 2) Integral proteins are built into the membrane and cannot be removed without damage. Some of these extend from one side of the membrane to the other (transmembrane proteins). Some these extend from one side of the membrane to the other (transmembrane proteins)....
View Full Document