16. What are the fermentation conditions for ethanol production?
A. pH 6; temperature 35°C
B. pH 5; temperature 35°C
C. pH 6; temperature 30°C
D. pH 5; temperature 30°C
17. Which of the following is used for agitation in a fermentor?
A. Impeller
B. Baffles
C. Sparger
D. All of these
18. To maintain aseptic conditions during fermentation which of the following is needed?
A. Sterilization of fermentor
B. Sterilization of air supply
C. Aeration and agitation
D. All of these
19. High ethanol concentration
A. promotes yeast growth
B. inhibits yeast growth
C. promotes bacterial growth
D. inhibits bacterial growth