Fermentation Reactors MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Fermentation Reactors, a fundamental topic in the field of Biochemical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Fermentation Reactors MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Fermentation Reactors mcq questions that explore various aspects of Fermentation Reactors problems. Each MCQ is crafted to challenge your understanding of Fermentation Reactors principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Biochemical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Fermentation Reactors MCQs are your pathway to success in mastering this essential Biochemical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Fermentation Reactors. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

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Fermentation Reactors MCQs | Page 3 of 7

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Q21.
Mixing in an anaerobic sludge blanket reactor is due to

a.

rapid change in water temperatures throughout the reactor

b.

release of gases by the microbial populations

c.

swimming of microbes

d.

none of the above

Discuss
Answer: (b).release of gases by the microbial populations
Q22.
In batch culture, protogon is produced from peptone during the stationary phase with a yield of 0.4 protogon mg per g of peptone. If it is to be produced in a chemostat at a dilution rate of 0.5 h­¹ from a medium containing 10 g.l­¹ of peptone, then the rate of protogon synthesis would be

a.

0 g.l­¹h­¹

b.

0.5 g.l­¹h­¹

c.

1 g.l­¹h­¹

d.

2 g.l­¹h­¹

Discuss
Answer: (a).0 g.l­¹h­¹
Q23.
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

Discuss
Answer: (d).cells will redirect ATP to the active transport of lactic acid and H+ out of the cells
Q24.
Which of the following would not be subjected to the "glucose effect"?

a.

Aspergillus fumigatus

b.

Saccharomyces cerevisiae

c.

Escherichia coli

d.

Aspergillus niger

Discuss
Answer: (c).Escherichia coli
Q25.
Immobilized cell reactors for wastewater treatment have the advantage of having/being

a.

higher cell concentration

b.

more stable and prevent washout

c.

higher dilution rate before the cells washout

d.

all of the above

Discuss
Answer: (d).all of the above
Q26.
Yield coefficient represents

a.

total biomass or product produced

b.

conversion efficiency of a substrate into product

c.

conversion rate of a substrate into biomass or product

d.

production time of biomass or product

Discuss
Answer: (b).conversion efficiency of a substrate into product
Q27.
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

Discuss
Answer: (a).an aerated batch culture containing a initial high concentration of glucose
Q28.
When two populations compete for a single growth limiting substrate in a continuous fermenter, which organism would not be washed out?

a.

Organism maintaining the highest substrate concentration

b.

Organism maintaining the lowest substrate concentration

c.

Both (a) and (b)

d.

Organism maintaining the moderate substrate concentration

Discuss
Answer: (b).Organism maintaining the lowest substrate concentration
Q29.
The continuous cultures are not widely used in industry because

a.

they are not suited for the production of secondary metabolites

b.

contamination or mutation can have a disastrous effect on the operation

c.

the government will not approve the licensing of pharmaceuticals produced in continuous cultures

d.

all of the above

Discuss
Answer: (d).all of the above
Q30.
The lowest yield of ATP /is in

a.

fermentation

b.

aerobic respiration

c.

anaerobic respiration

d.

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

Discuss
Answer: (a).fermentation
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