Biology > AS Mark Scheme > A-level BIOLOGY (7402/2) Paper 2 Mark scheme (All)
A-level BIOLOGY (7402/2) Paper 2 Mark scheme
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01.1 1.Equilibrium reached; 2.Allow for expansion/pressure change in apparatus; 3.Allow respiration rate of seeds to stabilise; 3 1. Accept equilibrate 3. Ignore seeds acclimatise 01.2 1.Opt ... imum temperature/temperature for normal growth of seeds; 2.(Optimum temperature) for enzymes involved in respiration; 2 01.3 1.Oxygen taken up/used by seeds; 2.CO2 given out is absorbed by KOH (solution); 3.Volume/pressure (in B) decreases; 3 01.4 0.975/0.98; 2 If incorrect, 0.26 × 6 / or incorrect numbers divided by 1.6 for 1 mark [Show More]
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