Transport Across Cell Membranes

Question 1

Selectively permeable…

The two molecules that cell membranes are made of

Answer 1

Only certain molecules are able to pass through

Protein+phospholipid

Question 2

Things that CAN pass through

Things that CANNOT pass through

Answer 2

Glucose, oxygen, amino acids

Carbon dioxide, urea(waste products)

Question 3

Test for starch?

Answer 3

Iodine solution- turns black

Question 4

Test for simple sugar(maltose)

Answer 4

Benedicta solution, turns green

Question 5

Diffusion ?

Active and passive?

Answer 5

Diffusion: the spreading of particles.
Passive transport high to low(does not require energy)
Active transport low to high(does require energy)

Question 6

Osmosis

Is energy needed?

Answer 6

The movement of water through a selectively permeable membrane from an area of high water concentration to an area of low water concentration

Does NOT require energy

Question 7

Proteins are needed for active transport to take place

True/false

Answer 7

True

Question 8

Place animal cell in a solution of high water concentration what would happen

Answer 8

Swell and burst

Animal cells do not have a cell wall-less protection

Question 9

Place animal cell in a solution of high low concentration what would happen

Answer 9

Cell shrinks

Question 10

Place plant cell in a solution of high water concentration what would happen

Answer 10

Becomes turgid

Question 11

Place plant cell in a solution of low water concentration what would happen

Answer 11

Cell becomes plasmolysed

Shrinks but plants have walls