WJEC 2014 Online Exam Review
GCE Biology BY2 1072-01
All Candidates' performance across questions
Question Title
1
2
3
4
5
6
N
4904
4904
4906
4902
4882
4864
Mean
8.1
6
4.4
7.5
2.7
5.1
SD
3.7
2.7
1.7
2.6
2.1
3.2
Max Mark
15
13
10
13
9
10
FF
53.7
46.5
44
57.5
30.6
50.8
Attempt %
99.9
99.9
100
99.9
99.5
99.1
GCE Biology BY2 1072-01
6
50.8
Question
5
30.6
4
57.5
3
44
2
46.5
1
53.7
0
10
20
30
40
50
60
Facility Factor %
70
80
90
100
1
2
5
2
Examiner
only
Answer all questions.
1. The diagram below shows a villus of the small intestine.
villus
A
...................................................
B
...................................................
C
...................................................
Y
(a) Complete the diagram above by naming the structures A, B and C.[3]
(b)
With reference to the diagram only, describe and explain two features that are important
in the functioning of the villus.
[4]
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(1072-01)
3
(i) Name the substance secreted by cell type Y.[1]
(c)
Examiner
only
(ii)Explain two functions of the secretion of cell type Y in the process of digestion.[2]
(d) Layers of smooth muscle are found in the wall of the small intestine.
Explain the role of these muscle layers in the process of digestion.
[3]
1072
010 0 03
(e)
Amino acids absorbed by structure A are transported to the liver. Describe the fate of the
excess amino acids absorbed.
[2]
15
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(1072-01)
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4
2.
(i) State what is meant by the term transpiration.[2]
(a)
(ii)Give one benefit of transpiration to a plant.
[1]
(b) The diagram below shows a piece of apparatus called a potometer which is used to
measure the rate of transpiration.
leafy shoot
water
reservoir
tap
waterproof
seal
air bubble
scale
(i) Suggest why the end of the shoot should be cut under water before being inserted
into the potometer.
[2]
(ii)
State what measurements would have to be made, in order to determine the rate of
transpiration.[2]
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(1072-01)
Examiner
only
5
(c) The diagram below shows a sunken stoma which is an adaptation found in the leaves of
some plants that live in very dry conditions.
epidermal cell
air chamber
cuticle
guard cells
mesophyll cell
1072
010 0 0 5
Examiner
only
(i) State the general name for plants that live in, and are adapted for, dry conditions.
[1]
(ii) With reference to the diagram, explain how a sunken stoma is able to reduce
transpiration.[3]
(iii) Describe and explain two other adaptations which reduce the rate of transpiration
in plants that live in very dry conditions.
[2]
13
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(1072-01)
Turn over.
12
Examiner
only
5. The diagram below shows two types of cell that are found in phloem tissue.
sieve tube
element
companion cell
(a)
Name two other types of cell that are found in phloem.
[2]
.................................................................................................
1
2
.................................................................................................
(b) The function of phloem is to transport organic molecules, such as sucrose, in a plant.
Using the diagram only, explain how two features of the sieve tube element enable the
[4]
phloem to carry out its function.
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(1072-01)
13
(c)
The mass flow theory is one explanation to account for the movement of solutes in the
phloem.
Suggest why the presence of large numbers of mitochondria in the companion cells does
not support this theory.
[3]
Examiner
only
9
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(1072-01)
Turn over.