Actual 2024 AQA AS BIOLOGY 7401/1 Paper 1 Merged Question Paper + Mark Scheme
2
*02*
IB/M/Jun24/7401/1
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 Figure 1 shows a diagram of the human gas exchange system.
Figure 1
Structure B is muscle. The volume of the thorax is increased when structure B
contracts.
Name the structures labelled A and B.
[2 marks]
A
B
3
*03*
Turn over ►
IB/M/Jun24/7401/1
Do not write
outside the
0 1 box . 2 Figure 2 is a diagram of an alveolus and a blood vessel associated with the alveolus.
The direction of the movement of substances is shown by the arrows labelled C, D, E,
F and G.
Figure 2
Complete Table 1 by writing the correct letter, C, D, E, F or G, in the box next to each
statement. You may use each letter once, more than once or not at all.
[2 marks]
Table 1
Box Statement
represents the diffusion of oxygen
represents the transport of a gas mixture
represents blood moving at the highest pressure