Core 3: Temp On Cell Membranes

Question 1

IV

DV

Answer 1

IV: temp of water
DV: % transmission of light through solution

Question 2

Controls

Answer 2

Size of beetroot cube

Time left in water

Question 3

Method

Answer 3

1. Cut into cubes (2*2)
2. 8 boiling tubes at different temperatures
3. Set colourmiteter to Blue/green filter and calibrate with distilled water
4. Work out transmission for each temp solution

Question 4

Explain the results

Answer 4

1. Kinetic energy increase vibrates molecules more
2. Allows more pigment to leak out
3. Also can denature

Question 5

Alcohol

Answer 5

It’s because alcohol dissolved lipids in cell membrane so loses it structure