chapter 5 biology

Question 0

Fluid mosaic model

Answer 0

Mosaic of proteins floats in or on the fluid lipid bilayer like boars on a pond

Question 1

Membrane structure

Answer 1

Phospholipids arranged in a bilayer

Globular protiens inserted in the lipid bilayer

Question 2

Cellular membranes have 4 components

Answer 2

1. Phospholipid bilayer
   - flexible matrix, barrier to permeability
2. Transmembrane proteins
   - integral membrane proteins- can move about
3. Interior protein network
   - peripheral membrane proteins- structural support- attached to cytoskeleton, held to transmembrane proteins by ionic or hydrogen bonds
4. Cell surface marker
   - glycoproteins ( attached to integral proteins) and glycolipids ( attached to phospholipid)

Question 3

Phospholipids

Answer 3

Structure consists of
 - glycerol - a 3 - carbon polyalchol
- 2 fatty acids attached to the glycerol
      - non polar Abadan hydrophilic 
Spontaneous forms a bilayer
 - fatty acids are on the inside
 - phosphate groups are on both surfaces

Question 4

What spontaneously form bilayers?

Answer 4

Phospholipids