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The organism Aspergillus niger is used to produce which industrial product?
A{'text': 'Citric acid', 'label': 'A'}
B{'text': 'Butyric acid', 'label': 'B'}
C{'text': 'Ethanol', 'label': 'C'}
D{'text': 'Streptokinase', 'label': 'D'}
Answer & Solution
Correct answer: A. {'text': 'Citric acid', 'label': 'A'}
1. NCERT lists organic-acid producers for industrial fermentation.
2. Aspergillus niger, a fungus, is the source of citric acid.
3. Acetobacter aceti produces acetic acid; Clostridium butylicum produces butyric acid.
4. Lactobacillus produces lactic acid; Saccharomyces produces ethanol.
_Source: NCERT Class 12 Biology, Ch 8 "Microbes in Human Welfare", §8.2.3_
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