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Which microorganism is used for production of methanol as fuel in industry? (1) Acetobacter               (2) Azobacter (3) Sacchromyces          (4) Clostridium […]

Enzymes are nowadays used extensively in bio-processing industries. Enzymes 1 is used for treatment of hides to provide a finer texture, in leather processing and manufacture of glue. Enzyme 2 […]

Enzyme used in cheese production is- (1) Rennet             (2) α-Amylase (3) Lactase            (4) Trypsin Correct answer: (1) Rennet Rennet is […]

Coliforms are used as indicator organisms of sewage pollution because they (1) are pathogens. (2) ferment lactose. (3) are abundant in human intestines. (4) grow within 24 hours. Correct answer: […]

Novel groups of polyketides can be synthesized in Actinomycetes by (1) gene rearrangement. (2) gene amplification. (3) combinatorial biosynthesis. (4) metabolic engineering. Correct answer: (3) combinatorial biosynthesis In Actinomycetes, novel […]

Which one of the following statements is NOT true for a continuous culture-based fermentation? (1) The exponential phase of growth is extended. (2) Nutrients are utilized efficiently and faster. (3) […]

Which one of the following is NOT typically a product of fermentation? (1) Cheese                   (2) Black tea (3) Kombucha        […]

During the production of alcohol by fermentation using budding yeast, oxygen supply is kept ‘limited. Why? (1) Budding yeasts are obligate anaerobes and cannot tolerate oxygen. (2) Budding yeasts lose […]

Which of the following microbial fermentations are anaerobic? (1) Ethanol and acetone-butanol. (2) Citric acid and propionic acid. (3) Penicillin and vitamin B12 (4) Streptomycin and rifampicin. Correct answer: (1) […]

Which one of the following statements CANNOT be included while defining the fermentation process? (1) Alcohol is formed from sugar residues (2) Requires an electron transport system. (3) Utilizes an […]