Exam (elaborations)
AQA AS BIOLOGY Paper 2 JUNE 2024 QUESTION PAPER
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A levelAQA
Please write clearly in block capitals.
Centre Candidate
number number
Surname
Forename(s)
Candidate ure
signat
AS
BIOLOG
Y
Paper 2
Thursday 23rd May 2024 Morning Time allowed: 1 hour 30 minutes
Materials
For this paper you must have: For Examiner’s Use
a ruler with millimeter measurements
Questio Mark
a scientific calculator. n
1
Instructions 2
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page. 3
Answer all questions. 4
You must answer the questions in the spaces provided. Do 5
not write outside the box around each page or on blank
6
pages.
7
If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s). 8
Show all your working. 9
Do all rough work in this book. Cross through any work you do
not want to be marked. TOTAL
Information
The marks for the questions are shown in brackets.
The maximum mark for this paper is 75.
,A level
, Answer all questions in the spaces
provided.
0 1 .1 Water has a high heat capacity and a large latent heat of vaporisation.
Describe the importance of each of these properties to living organisms.
[2 marks]
High heat capacity
Large latent heat of vaporisation
0 1 .2 Figure 1 shows that water loss from a porous pot can cause the upward
movement of water.
Figure 1
, Biologists have concluded that the experiment in Figure 1
supports the cohesion–tension theory of water transport in the
xylem.
Explain how this conclusion is supported by the experiment in [3 marks]
Figure 1.
0 1
.3 An air bubble was introduced into the glass tubing in Figure 1. The air
bubble moved a distance (d) of 1.5 cm in 120 minutes. The radius of the
lumen (hole) of the glass tubing was 0.6 cm
Use this information and the formula πr2d to calculate the rate of water
movement in the glass tubing in cm3 hour–1.
Use π = 3.14 in your calculation.
[1 mark]
Answer cm3 hour–1 6
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