Chemical Process
Air used in aerobic fermentation must be sterilized, otherwise the

Recovery of product will be difficult
Uniformity of product cannot be achieved
Contamination of pure culture would result
None of these

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Chemical Process
Pasteurisation of milk means

Removal of fatty and albuminous substance from it
None of these
Inhibiting the growth of micro-organisms without killing them
Killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics

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