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Fermentation Reactors

When Escherichia coli grow in a well aerated medium, which of the following will occur?

Question: When Escherichia coli grow in a well aerated medium, which of the following will occur?
[A].

Fructose di-phosphate accumulation inside the cells leading to cell respiration

[B].

Fructose di-phosphate accumulation inside the cells leading to fermentation

[C].

Fructose di-phosphate will accumulate regardless of the medium composition

[D].

Fructose di-phosphate will accumulate inside the cells leading to anaerobic respiration

Answer: Option B

Explanation:

No answer description available for this question.

When Escherichia coli grow in a well aerated medium, which of the following will occur? Read More »

Biochemical Engineering, Fermentation Reactors

The lowest biomass yield in a culture of Escherichia coli will be in

Question: The lowest biomass yield in a culture of Escherichia coli will be in
[A].

an aerated batch culture containing a initial high concentration of glucose

[B].

an aerated batch reactor containing an initial low concentration of glucose

[C].

an aerated fed-batch reactor having a low glucose concentration

[D].

an aerated continuous reactor having a low glucose concentration

Answer: Option A

Explanation:

No answer description available for this question.

The lowest biomass yield in a culture of Escherichia coli will be in Read More »

Biochemical Engineering, Fermentation Reactors

Which of the following would not be subjected to the “glucose effect”?

Question: Which of the following would not be subjected to the “glucose effect”?
[A].

Aspergillus fumigatus

[B].

Saccharomyces cerevisiae

[C].

Escherichia coli

[D].

Aspergillus niger

Answer: Option C

Explanation:

No answer description available for this question.

Which of the following would not be subjected to the “glucose effect”? Read More »

Biochemical Engineering, Fermentation Reactors

Saccharomyces cerevisiae when grown in high glucose concentration medium, the cells activity depends on which of the following?

Question: Saccharomyces cerevisiae when grown in high glucose concentration medium, the cells activity depends on which of the following?
[A].

High concentration of dissolved oxygen

[B].

Low concentration of dissolved oxygen

[C].

No effect of dissolved oxygen

[D].

High concentration of dissolved oxygen and sodium salts

Answer: Option C

Explanation:

No answer description available for this question.

Saccharomyces cerevisiae when grown in high glucose concentration medium, the cells activity depends on which of the following? Read More »

Biochemical Engineering, Fermentation Reactors

A Bacillus sp. produces an antibiotic only during the stationary phase when grown in a batch culture. If grown in a 5 litre continuous culture, the steady state productivity of the antibiotic

Question: A Bacillus sp. produces an antibiotic only during the stationary phase when grown in a batch culture. If grown in a 5 litre continuous culture, the steady state productivity of the antibiotic
[A].

will increase until the culture washes out

[B].

will decrease after washout

[C].

will be zero

[D].

will be infinite

Answer: Option C

Explanation:

No answer description available for this question.

A Bacillus sp. produces an antibiotic only during the stationary phase when grown in a batch culture. If grown in a 5 litre continuous culture, the steady state productivity of the antibiotic Read More »

Biochemical Engineering, Fermentation Reactors

A continuous reactor has a dilution rate of 0.5 h-1. Its residence time would be

Question: A continuous reactor has a dilution rate of 0.5 h-1. Its residence time would be
[A].

ln(2)/0.5

[B].

ln(2) x 0.5

[C].

0.5 h

[D].

2 h

Answer: Option D

Explanation:

No answer description available for this question.

A continuous reactor has a dilution rate of 0.5 h-1. Its residence time would be Read More »

Biochemical Engineering, Fermentation Reactors