7.1 fluid mosaic model

Question 1

most of the membrane is

Answer 1

lipids and proteins

also carbohydrates are important

Question 2

most abundant lipid in membrane

Answer 2

phospholipid

Question 3

amphipathic molecule has

Answer 3

hydrophilic and hydrophobic end

Question 4

fluid mosaic mode l

Answer 4

model of the membrane with-

• mosaic of proteins
• in phospholipids

Question 5

Gorter and Grnedel

Answer 5

Dutch scientists that said that he membrane must be of phospholipid bilayers

Question 6

Davson and Danielli

Answer 6

propose the sandwich model

phospholipid bilayer between 2 layers of proteins

Question 7

2 problems of the sandwich model

Answer 7

1- generalized that all membranes are the same
2-proteins are also amphipathic
so if they are on the outside of the phospholidpid bilayer, the hydrophobic parts would touch water

Question 8

Singer and Nicolson

Answer 8

propose that proteins are integrated in the the membrane with their hydrophilic parts sticking ut

(fluid mosaic model)

Question 9

freeze fracturing

Answer 9

splits membrane along phospholidpids