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AQA GCE Biology A2 Award 2411
Unit 5 Coordination
Unit 5
Control in Cells & Organisms
Coordination
Practice Exam Questions
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
Syllabus reference
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
1
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
Total 8 marks
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
2
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
Total 9 marks
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
3
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
Total 8 marks
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
4
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
Total 8 marks
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
5
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
Total 6 marks
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
6
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
7
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
8.
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
Total 10 marks
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
9.
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
Total 12 marks
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
10.
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Unit 5 Coordination
11
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
13
In an investigation into synapses a number of stimuli were applied as shown in the diagram below.
All stimuli were of the same intensity.
Measurements of any electrical changes in the postsynaptic neurone were recorded and are shown
in the three graphs below:
[a] In graph 1 two stimuli, A and B, have been applied. Explain why no action potential is produced
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1 mark
1 2 3
B B D A A C C+D
Stimuli A and B
applied here
Stimulus C
applied here Stimulus D
applied here
postsynaptic neurone
presynaptic
neurone
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
[b] In graph 2 the same two stimuli have been applied. Explain why an action potential is produced
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2 marks
[c] In graph 3 two stimuli, C and D, have been applied separately and then together. Explain the
observed results.
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4 marks
Total 7 marks
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
Answers and Markscheme
1
2
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
3.
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
4
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Unit 5 Coordination
5
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Unit 5 Coordination
6
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Unit 5 Coordination
6 continued
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
6 continued
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Unit 5 Coordination
7
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Unit 5 Coordination
8
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Unit 5 Coordination
9.
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Unit 5 Coordination
9 continued
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
9 continued
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
9 continued
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
10.
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
11.
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
AQA GCE Biology A2 Award 2411
Unit 5 Coordination
13
[a] Neither stimulus has reached the threshold potential
[b] The stimuli have been applied close together (in time); there has been temporal summation
[c] Neither stimulus is large enough to reach the threshold potential; When applied together there is summation; this is spatial summation; summation means the threshold potential is reached
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