QuizMaster

Question: A microorganism which is subjected to the Crabtree effect is most likely to
[A].

ferment in the presence of low concentrations of sugar and dissolved oxygen

[B].

respire in the presence of low sugar and high dissolved oxygen concentrations

[C].

ferment in the presence of high concentrations of sugar and dissolved oxygen

[D].

respire in the presence of high sugar and low dissolved oxygen concentrations

Answer: Option C

Explanation:

No answer description available for this question.

Question: Which of the following organisms will continue their metabolism at high substrate concentrations?
[A].

Pseudomonas aeruginosa

[B].

Saccharomyces cerevisiae

[C].

Bacillus subtilis

[D].

Escherichia coli

Answer: Option A

Explanation:

No answer description available for this question.

Question: Formation of end product by Lactococcus lactis will become non-growth associated as lactic acid accumulates because
[A].

cells will redirect ATP to anabolism

[B].

cells will redirect NAD+ to anabolism

[C].

cells will redirect ATP to facilitate the diffusion of lactic acid and H+ out of the cells

[D].

cells will redirect ATP to the active transport of lactic acid and H+ out of the cells

Answer: Option D

Explanation:

No answer description available for this question.

Question: Which of the following is best described as secondary metabolite?
[A].

Acetic acid produced from the oxidation of ethanol

[B].

Ethanol from the fermentation of glucose

[C].

Penicillin

[D].

Citric acid from the partial oxidation of glucose

Answer: Option C

Explanation:

No answer description available for this question.

Question: If biomass yields are constant, then the biomass productivity of a culture grown in continuous reactor will
[A].

always decrease with dilution rate

[B].

increase with dilution rate until washout

[C].

remain constant irrespective of the dilution rate

[D].

decrease with dilution rate until washout

Answer: Option B

Explanation:

No answer description available for this question.

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.

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.

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.

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.

Question: The lowest yield of ATP /is in
[A].

fermentation

[B].

aerobic respiration

[C].

anaerobic respiration

[D].

same in (a), (b) and (c)

Answer: Option A

Explanation:

No answer description available for this question.