This question is about the decay of milk - AQA - GCSE Biology - Question 8 - 2020 - Paper 1
Question 8
This question is about the decay of milk.
1. Name two types of microorganisms that cause decay.
2. Cows' milk is pH 6.6.
As milk decays, lipids in the milk are bro... show full transcript
Worked Solution & Example Answer:This question is about the decay of milk - AQA - GCSE Biology - Question 8 - 2020 - Paper 1
Step 1
Name two types of microorganisms that cause decay.
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Answer
Two types of microorganisms that cause decay include:
Bacteria
Fungi
These microorganisms play a significant role in the decomposition process.
Step 2
Name the product that causes the pH to decrease.
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Answer
The product that causes the pH of milk to decrease is fatty acids. As lipids break down, they release fatty acids, which lower the pH.
Step 3
How can the investigation be developed to find out if the student is correct?
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Answer
To develop the investigation, tick the box for:
Determine the types of bacteria present in the milk.
This choice allows for a better understanding of the microbial activity related to different storage temperatures and its impact on food safety.
