Microorganisms can be used to produce foods such as mycoprotein and yogurt - Edexcel - GCSE Biology - Question 1 - 2017 - Paper 1
Question 1
Microorganisms can be used to produce foods such as mycoprotein and yogurt.
(a) Mycoprotein is produced from the microorganism Fusarium which is grown in a fermente... show full transcript
Worked Solution & Example Answer:Microorganisms can be used to produce foods such as mycoprotein and yogurt - Edexcel - GCSE Biology - Question 1 - 2017 - Paper 1
Step 1
Draw one line from each substance supplied to its correct use in the fermenter.
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Answer
Air → to supply oxygen
Glucose → as an energy source
Step 2
Precautions are taken to ensure that the fermenter is not contaminated with other microorganisms. State the name of these types of precautions.
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Answer
Sterilization
Step 3
Explain why the cooling system is needed.
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Answer
The cooling system is needed to maintain the optimal temperature for microbial growth and to prevent the overheating of the fermenter, which can inhibit the growth of the microorganism.
Step 4
What type of microorganism is Fusarium? Put a cross (X) in the box next to your answer.
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Answer
B ✔
Step 5
Suggest how the pH changes during yogurt production.
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Answer
During yogurt production, the pH decreases as lactic acid bacteria ferment lactose into lactic acid, causing the environment to become more acidic.
