Transport in cells

Question 1

What happens to red blood cells when they are placed in water?

Answer 1

The cells swell up and burst

Question 2

The mass of a cylinder of beetroot was 2.5 g. If its final mass in an osmosis experiment was 2.7 g, what was the increase in mass in per cent?

Answer 2

8

Question 3

What is the surface area to volume ratio of a cube with sides 7 cm?

Answer 3

0.86

Question 4

Which of the following organisms has the largest surface area to volume ratio?

1) elephant
2) bacterium
3) butterfly

Answer 4

bacterium

Question 5

If the decrease in mass of a cylinder of beetroot was 0.62 g in 48 minutes, what was the rate of water loss?

Answer 5

0.78 g h-1

Question 6

What type of movement is the movement of carbon dioxide into a leaf

Answer 6

Passive

Question 7

What will happen if a spray of perfume is released into one corner of a room?

Answer 7

Particles of the perfume will diffuse until they are spread evenly through the room

Question 8

Which factor will decrease the rate of diffusion across a membrane?

Answer 8

Decreasing the temperature

Question 9

Why does a mouse experience more problems with heat loss than an elephant?

Answer 9

The mouse has a larger surface area to volume ratio