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Home ‣ Microbiology ‣ Industrially Useful Microbial Processes See What Others Are Saying!
- Question
Which of the following microorganism produces only L(+) - lactic acid without further racemization?
Options- A. Leuconostoc mesenteroides
- B. Lactobacillus delbrueckii
- C. Rhizopus oryzae
- D. Lactobacillus bulgaricus
- Correct Answer
- Rhizopus oryzae
- 1. Radioisotopes are frequently used in the study of cells. Assume a culture of E. coli is grown in a culture medium containing radioactive sulphur. At the end of 48 hours, it is expected to find the radioactive label located in
Options- A. DNA
- B. enzymes
- C. RNA
- D. all of these Discuss
- 2. Which of the following techniques may be performed quantitatively to determine the number of bacteria of a particular type?
Options- A. Pour plate
- B. Spread plate
- C. Both (a) and (b)
- D. Streak plate technique Discuss
- 3. All of the following species are considered coliforms except
Options- A. Enterobacter aerogenes
- B. Klebsiella pneumoniae
- C. Salmonella typhi
- D. Escherichia coli Discuss
- 4. Certain strains of Streptococcus lactis var. maltigenes may produce
Options- A. bitter flavor
- B. acid flavor
- C. burnt or caramel flavor
- D. none of these Discuss
- 5. Organisms with complex life cycles which include a mammalian host and an insect host and involves schizogony as part of the cycle belong to which phylum of Protozoa?
Options- A. Sarcomastigophora
- B. Microspora
- C. Apicomplexa
- D. Myxozoa Discuss
- 6. Water molds belong to which division?
Options- A. Ascomycota
- B. Basidiomycota
- C. Chytridiomycota
- D. Oomycota Discuss
- 7. Treatment of municipal water supplies is based upon
Options- A. coagulation, filtration, chlorination
- B. chlorination, filtration, coagulation
- C. filtration, coagulation, chlorination
- D. coagulation, chlorination, filtration Discuss
- 8. Acid foods with a pH between 4.5 and 3.7 usually are spoiled by
Options- A. B. coagulans
- B. Saccharolytic anaerobe
- C. both (a) and (b)
- D. none of these Discuss
- 9. Suspected colonies of Staphylococcus aureus when grown on Baird-Parker medium shall show
Options- A. coagulase activity
- B. protease activity
- C. catalase activity
- D. none of these Discuss
- 10. A bacterial food intoxication refers to
Options- A. illness caused by presence of pathogens
- B. food borne illness caused by the presence of a bacterial toxin formed in food
- C. both (a) and (b)
- D. none of the above Discuss
More questions
Correct Answer: enzymes
Correct Answer: Both (a) and (b)
Correct Answer: Salmonella typhi
Correct Answer: burnt or caramel flavor
Correct Answer: Apicomplexa
Correct Answer: Oomycota
Correct Answer: coagulation, filtration, chlorination
Correct Answer: both (a) and (b)
Correct Answer: coagulase activity
Correct Answer: food borne illness caused by the presence of a bacterial toxin formed in food
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