Industrial Microbiology MCQs MCQs 50 Score: 0 Attempted: 0/50 Subscribe 1. : Industrial microbiology mainly deals with the study of (A) Microorganisms used in food spoilage (B) Microorganisms used in industrial processes (C) Microorganisms causing diseases (D) Microorganisms in soil 2. : The industrial production of alcohol is generally carried out by (A) Escherichia coli (B) Saccharomyces cerevisiae (C) Streptococcus lactis (D) Aspergillus niger 3. : Citric acid is commercially produced using (A) Lactobacillus bulgaricus (B) Aspergillus niger (C) Penicillium chrysogenum (D) Clostridium acetobutylicum 4. : The main microorganism used in penicillin production is (A) Penicillium notatum (B) Aspergillus niger (C) Rhizopus stolonifer (D) Candida albicans 5. : Lactic acid is produced industrially by (A) Lactobacillus species (B) Bacillus subtilis (C) Streptomyces griseus (D) Clostridium sporogenes 6. : Which microorganism is used in the production of vitamin B12? (A) Pseudomonas denitrificans (B) Lactobacillus acidophilus (C) Aspergillus niger (D) Saccharomyces cerevisiae 7. : The industrial fermentation process for producing acetone and butanol uses (A) Clostridium acetobutylicum (B) Bacillus cereus (C) Streptococcus pyogenes (D) Lactobacillus casei 8. : Antibiotic streptomycin is produced by (A) Streptomyces griseus (B) Penicillium notatum (C) Aspergillus fumigatus (D) Bacillus licheniformis 9. : The main carbon source used in citric acid fermentation is (A) Sucrose (B) Glucose (C) Molasses (D) Starch 10. : Which of the following is used to produce cheese flavor compounds? (A) Propionibacterium shermanii (B) Lactococcus lactis (C) Penicillium roqueforti (D) Both A and C 11. : Industrial enzymes are usually produced through (A) Fermentation (B) Chemical synthesis (C) Distillation (D) Extraction from plants 12. : The organism used in vinegar production is (A) Acetobacter aceti (B) Lactobacillus bulgaricus (C) Saccharomyces cerevisiae (D) Bacillus subtilis 13. : Gluconic acid is produced using (A) Aspergillus niger (B) Penicillium chrysogenum (C) Bacillus cereus (D) Lactobacillus plantarum 14. : The antibiotic erythromycin is produced by (A) Streptomyces erythraea (B) Penicillium chrysogenum (C) Bacillus megaterium (D) Aspergillus oryzae 15. : SCP stands for (A) Single Cell Protein (B) Simple Carbohydrate Production (C) Single Carbon Process (D) Secondary Cell Protein 16. : The production of enzymes like amylase and protease often uses (A) Bacillus species (B) Escherichia coli (C) Streptococcus pneumoniae (D) Salmonella typhi 17. : Citric acid fermentation is carried out under (A) Aerobic conditions (B) Anaerobic conditions (C) Semi-aerobic conditions (D) Facultative conditions 18. : Which of the following is a secondary metabolite? (A) Ethanol (B) Lactic acid (C) Penicillin (D) Citric acid 19. : The microorganism used in the production of insulin by genetic engineering is (A) Escherichia coli (B) Lactobacillus casei (C) Bacillus subtilis (D) Saccharomyces cerevisiae 20. : The most common method of sterilization in industrial fermentation is (A) Filtration (B) Autoclaving (C) Radiation (D) Dry heat 21. : Production of antibiotics is usually done in (A) Batch fermenters (B) Continuous fermenters (C) Air-lift fermenters (D) Photobioreactors 22. : The microorganism used for amylase production is (A) Bacillus licheniformis (B) Streptococcus thermophilus (C) Lactobacillus delbrueckii (D) Clostridium acetobutylicum 23. : Ethanol fermentation is an example of (A) Anaerobic fermentation (B) Aerobic fermentation (C) Mixed fermentation (D) Partial oxidation 24. : The antibiotic tetracycline is produced by (A) Streptomyces aureofaciens (B) Bacillus cereus (C) Aspergillus flavus (D) Penicillium roqueforti 25. : The term “upstream processing” refers to (A) Recovery and purification (B) Fermentation and product formation (C) Media preparation and inoculation (D) Packaging and distribution 26. : Downstream processing includes (A) Sterilization (B) Product recovery (C) Fermentation (D) Cell growth 27. : The microorganism used for vitamin C production is (A) Gluconobacter oxydans (B) Bacillus subtilis (C) Lactobacillus brevis (D) Aspergillus flavus 28. : Which of the following produces the enzyme invertase? (A) Saccharomyces cerevisiae (B) Lactobacillus acidophilus (C) Aspergillus oryzae (D) Bacillus megaterium 29. : The production of biogas uses (A) Anaerobic microorganisms (B) Aerobic microorganisms (C) Photosynthetic microorganisms (D) Acidophilic microorganisms 30. : Penicillin inhibits (A) Cell wall synthesis (B) Protein synthesis (C) Nucleic acid synthesis (D) ATP synthesis 31. : The antibiotic chloramphenicol is produced by (A) Streptomyces venezuelae (B) Bacillus subtilis (C) Aspergillus niger (D) Penicillium chrysogenum 32. : Continuous fermentation is suitable for (A) Lactic acid production (B) Beer fermentation (C) Vinegar production (D) Wine fermentation 33. : The main nitrogen source in fermentation media is (A) Ammonium salts (B) Sodium chloride (C) Calcium carbonate (D) Magnesium sulfate 34. : Biotransformation is (A) Conversion of a compound by microorganisms (B) Chemical synthesis (C) Physical filtration (D) Sterilization process 35. : Which of the following is used for enzyme production? (A) Aspergillus oryzae (B) Salmonella typhi (C) Vibrio cholerae (D) Clostridium tetani 36. : The first antibiotic discovered was (A) Penicillin (B) Streptomycin (C) Tetracycline (D) Erythromycin 37. : The term “fermentor” refers to (A) Vessel used for microbial growth (B) Microorganism (C) Culture medium (D) Enzyme 38. : The production of enzymes like protease often requires (A) Aeration (B) Dark conditions (C) Low temperature (D) Anaerobic environment 39. : A byproduct of yeast fermentation is (A) Carbon dioxide (B) Hydrogen (C) Methane (D) Nitrogen 40. : The production of citric acid requires a high (A) Sugar concentration (B) Protein concentration (C) Lipid concentration (D) Salt concentration 41. : Which of the following is used in steroid transformation? (A) Rhizopus species (B) Bacillus subtilis (C) Streptococcus species (D) Lactobacillus species 42. : Industrial fermentation is mainly carried out in (A) Bioreactors (B) Test tubes (C) Petri dishes (D) Flasks 43. : The production of amylase from Bacillus involves (A) Submerged fermentation (B) Solid-state fermentation (C) Both A and B (D) None 44. : Methanogens are (A) Anaerobic archaea (B) Aerobic bacteria (C) Fungi (D) Protozoa 45. : The primary goal of industrial microbiology is (A) Large-scale production of valuable products (B) Disease control (C) Environmental monitoring (D) Microbial taxonomy 46. : Which organism is used in citric acid production? (A) Aspergillus niger (B) Rhizopus stolonifer (C) Penicillium roqueforti (D) Streptococcus thermophilus 47. : The process of producing antibiotics is called (A) Secondary metabolism (B) Primary metabolism (C) Anabolism (D) Catabolism 48. : The main function of aeration in fermentation is (A) Provide oxygen (B) Remove carbon dioxide (C) Mix nutrients (D) All of the above 49. : The main purpose of agitation in fermentation is (A) Uniform mixing and oxygen distribution (B) Increase temperature (C) Reduce microbial growth (D) Evaporate water 50. : The product “rifamycin” is obtained from (A) Amycolatopsis rifamycinica (B) Bacillus cereus (C) Aspergillus flavus (D) Penicillium notatum