Unit 2: Mebrane Permiability

Question 1

Transport proteins

Answer 1

Move hydrophilic substances (large, polar)
Two types:
1. Channel protein
2. Carrier protein

Question 2

Channel protein

Answer 2

Hydrophilic tunnel that allows specific target molecules to pass through

Question 3

Carrier protein

Answer 3

Spans the membrane and changes shape to move molecules from one side to the other.

Question 4

Function of the Cell wall (plant only)

Answer 4

1. Structural boundary
2. Permeable barrier

Question 5

Structural boundary:

Answer 5

1. Protects/maintains cell shape
2. Prevent cell rupture
3. Helps plants stand against gravity

Question 6

Permeable barrier:

Answer 6

1. Small holes, plasmodesmata, that transfer nutrients, water, and ions.

Question 7

Cell wall is composed of what?

Answer 7

Complex carbohydrates

Question 8

Cell wall of a plant:

Answer 8

Polysaccharide : cellulose

Question 9

Cell wall of fungi

Answer 9

Polysaccharide : chitin

Question 10

Cell wall of a prokaryote

Answer 10

Polymer made up of sugar and amino acids : peptidoglycan