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Question: The production of an amylase from starch by Aspergillus niger is often performed in a fed batch fermenter. This is due to the reason that
[A].

fed-batch reactor can be used to minimize starch concentrations and prevent a. niger from fermenting

[B].

fed-batch reactor can be used to minimize starch concentrations and thus reduce the viscosity of the medium

[C].

continuous reactor can be used to minimize starch concentrations and their inhibitory effects

[D].

all of the above

Answer: Option B

Explanation:

No answer description available for this question.

Question: In aerobic yeast fermentation for production of citric acid from alkanes using a fed-batch culture, why alkanes are slowly fed to the yeast?
[A].

Citric acid is toxic to the cells

[B].

Alkanes cause foaming

[C].

Fast addition of alkanes will inhibit the cells and reduce oxygen transfer rates

[D].

Fast addition of alkanes will cause the cells to grow too quickly

Answer: Option C

Explanation:

No answer description available for this question.