AQA Biology: Transport into cells questions
Q1.
The diagram shows four ways in which molecules may move into a cell and out of a cell.
The dots show the concentration of molecules.
The cell is respiring aerobically.
Write the correct letter, A, B, C or D, next to each process.
Process
Arrow
A, B, C or D
The movement of oxygen molecules
The movement of carbon dioxide
molecules
(Total 2 marks)
Q2.
(a) The diagrams show cells containing and surrounded by oxygen molecules.
Oxygen can move into cells or out of cells.
Page 1
Into which cell, A, B, C or D, will oxygen move the fastest?
Write your answer, A, B, C or D, in the box.
(1)
Explain your answer (2)
(b)
Draw a ring around the correct word to complete each sentence.
diffusion
(i)
Oxygen is taken into cells by the process of
osmosis
.
respiration
(1)
breathing
(ii)
Cells need oxygen for
photosynthesis
.
respiration
(1)
membranes
(iii)
The parts of cells that use up the most oxygen are the
mitochondria
.
nuclei
(1)
diffusion
(iv)
Some cells produce oxygen in the process of
photosynthesis
.
respiration
(1)
(Total 5 marks)
Page 2
Q3.
The diagram shows a cell from the lining of the lung. This cell is specialised to allow
gases to pass through quickly.
(a)
Use words from the box to label structures A, B and C.
cell membrane
nucleus
chloroplast
cytoplasm
mitochondria
(3)
(b)
(i)
Which feature of this cell allows oxygen to pass through quickly?
Put a tick ( ) in the box next to your choice.
It is thin.
It has a large nucleus.
It has many mitochondria.
Page 3
M1.
D
1
A
1
M2.
(a)
A
1
This cell has the largest/steepest concentration gradient (high outside cell, low inside)
(b)
(i)
diffusion
1
(ii)
respiration
1
(iii)
mitochondria
1
(iv)
photosynthesis
1
[5]
M3.
(a)
A nucleus
1
B (cell) membrane
1
C cytoplasm
1
(b)
(i)
it is thin
1
Page 4