1. Aim How do molecules move in and out of a cell?

2. Transport
The movement of molecules across the cell membrane

3. Examples of Transport Passive transport (No energy needed)
Active transport
(ATP Energy needed)
Plasma or cell membrane

4. Passive Transport Diffusion High to Low concentration
No energy required

5. Active Transport Low to High concentration Energy is needed
ATP is used

6. Which way do molecules move naturally across membrane?
Towards the side with the least amount so it evens up
Hi to low
Count them

7. Size of molecule counts
Can’t pass through (large)
Pass through (small)
Water(osmosis)
Oxygen
Carbon dioxide
Glucose
Amino Acids
Starch
Proteins

8. The diagram below shows molecules represented by X both outside and inside of a cell.
A process that would result in the movement of these molecules out of the cell requires the use of
DNA
ATP
antigens
antibodies

9. The diagram represents movement of a large molecule across a membrane.
Which process is best represented in this diagram?
active transport
diffusion
protein building
gene manipulation

10. Which factor prevented the protein molecules from moving out of the cell?
1.temperature
2.pH
3.molecule size
4.molecule concentration

11. The diagram below represents a container of water and two different kinds of molecules, A and B, separated into two chambers by a membrane through which only water and molecule A can pass.
Which diagram of the container below correctly indicates the distribution of molecules A and B after the net movement of these molecules stops?
                                                                                                                                                                                           

12. Molecules A and B come in contact with the cell membrane of the same cell. Molecule A passes through the cell membrane readily, but molecule B does not. Which statement could describe molecules A and B?
1.Molecule A is a protein, and molecule B is a fat.
2.Molecule A is a starch, and molecule B is a simple sugar.
3.Molecule A is an amino acid, and molecule B is a simple sugar.
4.Molecule A is a simple sugar, and molecule B is a starch