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What is the main purpose of aeration?

Answer and explanation

Correct answer: To supply oxygen to aerobic cells

Direct answer: Option B is correct. Aeration is the process of supplying air, especially oxygen, to a bioprocess such as aerobic microbial growth in a fermenter. Aerobic cells need oxygen for respiration and energy production, so adequate oxygen helps them grow and carry out the intended production process. Step by step, cells use nutrients in the medium; aerobic cells also require oxygen; aeration transfers oxygen from air into the culture, often with help from stirring; therefore its main purpose is oxygen supply. Option B states this directly. Option A, colouring the fermenter, is unrelated to cell metabolism. Option C, freezing the product, is a later preservation or processing activity and is not the purpose of aeration. Option D, turning the medium into stone, is not a biological or engineering function of aeration. Aeration does not mean that oxygen is the only condition needed; temperature, pH, nutrients and mixing also matter, but oxygen supply is the main point asked here. Memory cue: aeration sounds like air—air supplies oxygen to aerobic cells.

Related tags

AerationOxygenAerobic Culture

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