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.

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Fermentation Reactors MCQs | Page 5 of 7

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Q41.
Production of organic acids in batch culture is generally growth associated phase followed by non-growth associated production. The probable reason for this is that

a.

organic acids uncouple catabolism from anabolism

b.

biomass yields increase as the fermentation proceeds

c.

organic acids are secondary metabolites

d.

high concentrations of organic acid promote the growth of the microbial population

Discuss
Answer: (a).organic acids uncouple catabolism from anabolism
Q42.
The concentration of biomass in a continuous stirred tank reactor is 20 g dry weight per litre. What would be the concentration of biomass in the effluent?

a.

Greater than 20 g dry weight per litre

b.

Approximately 20 g dry weight per litre

c.

Lesser than 20 g dry weight per litre

d.

More than 30 g dry weight per litre

Discuss
Answer: (b).Approximately 20 g dry weight per litre
Q43.
The ideal tubular-flow fermenter without radial variations is called a

a.

plug flow fermenter

b.

continuous stirred tank fermenter (CSTF)

c.

column fermenter

d.

any intensity of dilution rate near the wash out points

Discuss
Answer: (a).plug flow fermenter
Q44.
Pseudo-steady state in a continuous reactor refers to a reactor in which

a.

Pseudomonads are being cultured

b.

concentration oscillate around a mean value

c.

concentration increase with time

d.

concentration decrease with time

Discuss
Answer: (b).concentration oscillate around a mean value
Q45.
The toxicity of organic acids to cells

a.

enhances as the pH falls

b.

reduces as the pH falls

c.

is not affected by pH

d.

is highest at pH 7.0

Discuss
Answer: (a).enhances as the pH falls
Q46.
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 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

Discuss
Answer: (b).fed-batch reactor can be used to minimize starch concentrations and thus reduce the viscosity of the medium
Q47.
The fastest route of NADH reoxidation is

a.

aerobic respiration

b.

anaerobic respiration

c.

fermentation

d.

decomposition

Discuss
Answer: (c).fermentation
Q48.
In fed batch bioreactor modelling, the rate of change in the bioreactor volume is assumed to be equal to

a.

flow rate

b.

initial volume

c.

volume of solids in the reactor

d.

none of these

Discuss
Answer: (a).flow rate
Q49.
Monoclonal antibodies are typically produced in fed batch reactors because

a.

hybridoma cells ferment at high maltose concentrations

b.

hybridoma cells yield higher lactate at high glucose concentrations

c.

hybridoma cells respire at high glucose concentrations

d.

none of the above

Discuss
Answer: (b).hybridoma cells yield higher lactate at high glucose concentrations
Q50.
In plug flow tubular reactor the axial velocity profile on cross-section will be

a.

constant

b.

varying with time

c.

non-linear

d.

power function of time

Discuss
Answer: (a).constant
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