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Microbes in Human Welfare

Which one of the following microorganisms is used for the production of citric acid in industries?
A. Lactobacillus bulgaricus
B. Penicillium curriculum
C. Aspergillus niger
D. Rhizopus nigricana

C. Aspergillus niger

Aspergillus niger is a fungal microbe of great industrial importance. This mold is used extensively in the production of citric acid and in the production of several enzymes such as amylases, pectinases, and proteases (Godfrey and West, 1996).

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