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Which one of the following equipments is essentially required for growing microbes on a large scale, for industrial production of enzymes?

1. BOD incubator
2. Sludge digester
3. Industrial oven
4. Bioreactor

Correct answer: Bioreactor

Solution

A bioreactor is specifically built for controlled, large-scale growth of microorganisms and production of biomolecules like enzymes. The other options are used for incubation, waste treatment, or heating, not industrial fermentation.

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