Biology for IGCSE & O level - Biotechnology And Genetic Modification (Section 1 - No. 35)
What is the main function of a 'stirrer' in a fermenter?
To maintain the pH level
To cool the contents
To keep the mixture consistent
To add air to the mixture
Explanation
The stirrer keeps the mixture in the fermenter consistent by mixing all of the ingredients. This makes the mixture have the same levels of nutrients and oxygen.
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