A) Saccharomyces cerevisiae
B) Aspergilfus niger
C) Acetobacter
D) Clostridium butylicum
Correct Answer: A
Solution :
Microorganism used for commercial production of acetic acid is bacterium Acetobacter aceti. The production of acetic acid is carried from sugar solution or ethyl alcohol by bacterium \[C{{H}_{3}}C{{H}_{2}}OH+{{O}_{2}}\xrightarrow[Acetobacter\,aceti]{Bacterium}C{{H}_{3}}COOH+{{H}_{2}}O\] Clastrodium butyrfcum is source of vitamin\[{{B}_{2}}\] and also nitrogen- fixing organism. Aspergillus niger is source of enzyme glucose oxidase, citric acid and gluconic acid while Saccharomyces cerevisiae, a common yeast used in baking industry.
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