Exam (elaborations)
Specimen QP Paper AQA Biology A Level
- Institution
- University Of South Africa (Unisa)
Specimen QP Paper AQA Biology A Level
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PMTSPECIMEN iiMATERIAL
A-level
BIOLOGY
(7402/1)
Paper 1 ii
Specimen 2014 ii Session Time allowed: 2 hours
ii ii ii
Materials
For iithis iipaper iiyou iimust iihave:
a iiruler iiwith iimillimetre iimeasurements
a iicalculator.
Instructions
Use iiblack iiink iior iiblack iiball-point iipen.
Fill iiin iithe iiboxes iiat iithe iibottom iiof iithis iipage.
Answer iiall iiquestions.
Information
The iimarks iifor iiquestions iiare iishown iiin iibrackets.
The iimaximum iimark iifor iithis iipaper iiis ii91.
Please iiwrite iiclearly, iiin iiblock iicapitals, iito iiallow iicharacter iicomputer iirecognition.
Centre iinumber Candidate iinumber
Surname
Forename(s)
Candidate iisignature
, PMT
2
Answer iiall iiquestions iiin iithe iispaces iiprovided.
1 A iitechnician iiinvestigated iithe iieffect iiof iitemperature iion iithe iirate iiof iian iienzyme-
controlledireaction. i i At iieach iitemperature, iihe iistarted iithe iireaction iiusing iithe iisame
iiconcentration
of iisubstrate.
Figure ii1 iishows iihis iiresults.
0 1
. 1 Give iitwo iiother iifactors iithe iitechnician iiwould iihave iicontrolled.
[1 iimark]
1 ii i ii
2 iiiii
0 1
. 2 Draw iia iitangent iion iieach iicurve iito iifind iithe iiinitial iirates iiof iireaction.
Use iithese iivalues iito iicalculate iithe iiratio iiof iithe iiinitial iirates iiof iireaction iiat ii60 iiC ii: ii37
iiC.iShow iiyour iiworking.
[2 iimarks]
Ratio ii= :1
, PMT
3
0 1 . 3 Explain iithe iidifference iiin iithe iiinitial iirate iiof iireaction iiat ii60 iiC iiand ii37 iiC.
[2 iimarks]
0 1
. 4 Explain iithe iidifference iiin iithe iirates iiof iireaction iiat ii60 iiC iiand ii37 iiC iibetween ii20
iiandi40 iiminutes.
[4 iimarks]
[Extra iispace]
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