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- Question
B. flavum strain can be used for the production of
Options- A. L-Threonine
- B. L-Proline
- C. L-Isoleucine and L-Histidine
- D. All of the above
- Correct Answer
- All of the above
- 1. Which of the following are true for the heterofermentative microorganism producing lactic acid?
Options- A. Only trace amounts of end products other than lactic acid
- B. Some lactic acid with carbon dioxide, ethyl alcohol, acetic acid and trace amount of few other products
- C. They are used for commercial lactic acid production
- D. None of the above Discuss
- 2. Which of the following when used in proper concentration stimulates the Ascomycetes fermentation of vitamin B12 and can be used to counteract toxicity of iron in Candida species?
Options- A. Co
- B. Ni
- C. Zn
- D. Ca Discuss
- 3. Why high concentration of sugars are not employed in the fermentation medium?
Options- A. Calcium lactate is not produced
- B. Calcium lactate crystallizes from the medium and slows down the process of fermentation
- C. High sugar concentration itself crystallizes
- D. None of the above Discuss
- 4. Penicillin G is also known as
Options- A. hydroxy benzyl penicillin
- B. phenoxy methyl penicillin
- C. benzyl penicillin
- D. 2-pentenyl penicillin Discuss
- 5. A major organic acid produced by a microbial process used in foods is
Options- A. sulfuric acid
- B. citric acid
- C. oxalic acid
- D. uric acid Discuss
- 6. The maximum concentration of ethanol that is achieved by successive distillation of fermentation broth in continuous stills is
Options- A. 60%
- B. 95%
- C. 70%
- D. 99% Discuss
- 7. Which of the following is a heterofermentative micro-organism?
Options- A. Leuconostoc mesenteroides
- B. Lactobacillus delbrueckii
- C. Lactobacillus bulgaricus
- D. Lactobacillus pentose Discuss
- 8. The early assay employed for measuring penicillin activity were based upon the quantity required to prevent growth of S. aureus over
Options- A. 20 mm diameter zone using the cylinder plate method of assay
- B. 24 mm diameter zone using the cylinder plate method of assay
- C. 200 mm diameter zone using the cylinder plate method of assay
- D. None of the above Discuss
- 9. Which of the following is known for greater stability of the riboflavin producing capacity?
Options- A. Eremothecium ashbyii
- B. Ashbya gossypii
- C. Candida flareri
- D. None of these Discuss
- 10. The enzyme which converts optically active isomers of lactic acid to the optically inactive racemic mixture is
Options- A. isomerase
- B. racemase
- C. dehydrogenase
- D. invertase Discuss
Industrially Useful Microbial Processes problems
Search Results
Correct Answer: Some lactic acid with carbon dioxide, ethyl alcohol, acetic acid and trace amount of few other products
Correct Answer: Co
Correct Answer: Calcium lactate crystallizes from the medium and slows down the process of fermentation
Correct Answer: benzyl penicillin
Correct Answer: citric acid
Correct Answer: 95%
Correct Answer: Lactobacillus delbrueckii
Correct Answer: 24 mm diameter zone using the cylinder plate method of assay
Correct Answer: Ashbya gossypii
Correct Answer: racemase
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