Structure Of Cell Membrane

Question 1

Cell membrane composed of _ groups of chemicals

Answer 1

4

Question 2

Phospholipids make up _ percent of membrane

Answer 2

25

Question 3

Proteins make up _ percent of membrane

Answer 3

55

Question 4

Cholesterol make up _ percent of membrane

Answer 4

15

Question 5

Carbs and other lipids make up _ percent of membrane

Answer 5

5

Question 6

Phospholipids are made up of two layers known as a _

Answer 6

Bilayer

Question 7

Bilayer act as very thin, yet impenetrable barrier to _ and _

Answer 7

Water

Water-soluble molecules (glucose)

Question 8

_ can pass through Bilayer freely

Answer 8

Fat-soluble molecules

Question 9

Fat-soluble molecules such as _ (3)

Answer 9

CO2

O

Steroids

Question 10

_ provide a means by which water-soluble molecules can enter and leave a cell

Answer 10

Proteins

Question 11

Proteins also allow cells to communicate with _ and _ to each other

Answer 11

Recognize

Adhere

Question 12

Cholesterol molecules are, in a sense, _ within Bilayer

Answer 12

Dissolved

Question 13

Cholesterol reduces the fluidity of the membrane by interfering with _

Answer 13

Lateral movement of phospholipid tails

Question 14

Carbs attached to _ and _

Answer 14

Proteins (glycoproteins)

Lipids (glycolipids)

Question 15

Glycoproteins and glycolipids protrude on outer surface of membrane and are important for cell _ and _

Answer 15

Adhesión

Communication

Question 16

Carbs only found in _

Answer 16

Outside surface of cell membrane

Question 17

Internal scaffolding of cell is called the _

Answer 17

Cytoskeleton