AQA GCSE BIOLOGY Higher Tier Paper 2H 2020.
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AQA GCSE BIOLOGY Higher Tier Paper 2H 2020.
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--237december 20212021/2022A+
- GCSE 
BIOLOGY 
Higher Tier Paper 2H 
H 
2 
*02* 
IB/M/Jun20/8461/2H 
Answer all questions in the spaces provided. 
0 1 This question is about the decay of milk. 
0 1 . 1 Name two types of microorganism that cause decay. 
[2 marks] 
1 
2 
0 1 . 2 Cows’ milk is pH 6.6. 
As milk decays, lipids in the milk are broken down. 
One of the products of the breakdown of lipids causes the pH of milk to decrease. 
Name the product that causes the pH to decrease. 
[1 mark] 
Do not write 
outside the 
box ...
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