11. Which of the following microorganisms help in ethanol production?
A. Saccharomyces cerevisiae
B. Zymomonas mobilis
C. Saccharomyces uvarum
D. All of these
12. After the fermentation is over, ethanol is recovered by
A. centrifugation
B. distillation
C. filtration
D. cell disintegration
13. The Zygomonas has merit over yeast because
A. it has more osmotic tolerance to higher sugar concentration
B. it has high tolerance to ethanol
C. it has more specific growth rate
D. all of the above
14. Which of the following organism is not used in any of the traditional industrial fermentation?
A. E. coli
B. Yeast
C. Bacillus
D. Pseudomonas
15. How is air supply to the fermentor sterilized?
A. By heat filtration
B. Filtration through fibrous material
C. Filtration through granular material
D. All of the above