This set of Microbiology Multiple Choice Questions & Answers (MCQs) focuses on “Industrial Uses of Bacteria”.
1. Which of the following microorganism produces dextran?
a) Bacillus polymyxa
b) Bacillus thuringiensis
c) Leuconostoc mesenteroides
d) Streptomyces olivaceus
Explanation: Leuconostoc mesenteroides is the producer organism for dextran which acts as a stabilizer in food products and as a blood plasma substitute.
2. Which of the following carbohydrates are mainly present in whey?
Explanation: Whey represents a satisfactory medium for the growth of certain bacteria, since it contains lactose, nitrogenous substances including vitamins, and salts.
3. Lactobacillus bulgaricus is a homofermentative organism.
Explanation: Lactobacillus bulgaricus grows rapidly and is homofermentative and thus is capable of converting the lactose to the single end product-lactic acid.
4. What temperature is necessary for the production of vinegar?
a) 43 degree C
b) 60 degree C
c) 10-13 degree C
d) 15-34 degree C
Explanation: For vinegar production it is necessary to keep the temperature between 15 and 34 degree C, the optimum for growth and metabolism of the acetobacters.
5. Which of the following product is used for treatment of pernicious anemia?
Explanation: Cobalamin or vitamin B12 is used for treatment of pernicious anemia and also for food and feed supplements.
6. Microbial fermentation produces D optical isomers of the amino acids.
Explanation: Advantage of microbial fermentation processes is that the biologically active forms of the amino acids i.e. L optical isomers are produced.
7. Diaminopimelic acid (DAP) is produced by which of the following microorganism?
b) Enterobacter aerogenes
c) Bacillus subtilis
d) Streptococcus equisimilis
Explanation: Production of lysine involves two stages among which the first stage is the formation of diaminopimelic acid (DAP) by E.coli.
8. Which of the following raw materials are important for the production of glutamic acid?
b) corn-steep liquor
Explanation: For glutamic acid the medium generally consists of a carbohydrate, peptone, inorganic salts, and biotin; the concentration of biotin has a significant influence on the yield of glutamic acid.
9. Insulin was isolated from which of the following organs of animals?
a) small intestine
Explanation: Commercial insulin for the therapy of diabetes was isolated from animal pancreatic tissue.
10. Which of the following yeast is used for the production of riboflavin?
a) Saccharomyces cerevisiae
b) Eremothecium ashbyi
c) Saccharomyces rouxii
d) Candida utilis
Explanation: Eremothecium ashbyi is used for the production of riboflavin which is used as a vitamin supplement.
11. Which of the following product utilises whey as its raw material?
a) lactic acid
b) acetic acid
c) glutamic acid
Explanation: Whey is used for the production of lactic acid which can also be grown using other carbohydrate substances such as corn or potato starch.
Sanfoundry Global Education & Learning Series – Microbiology.
To practice all areas of Microbiology, here is complete set of 1000+ Multiple Choice Questions and Answers.