QuizMaster

Which of the following factors will affect the sensitivity of animal cells to shear conditions?

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Question: Which of the following factors will affect the sensitivity of animal cells to shear conditions?
[A].

Cell size

[B].

Availability of nutrients in the medium

[C].

The presence of shear protectorants in the medium

[D].

All of the above

Answer: Option D

Explanation:

No answer description available for this question.

Animal cell cultures do not have much effect on shear forces because

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Question: Animal cell cultures do not have much effect on shear forces because
[A].

the cell size is generally smaller than the critical eddy size at which shear will have an effect

[B].

cells are larger than the critical eddy size at which shear will have an effect

[C].

animal cells have cell walls

[D].

animal cells have cell membranes

Answer: Option A

Explanation:

No answer description available for this question.

A stirred tank reactor containing a fluid with a density of 2.5 g.ml-1 and viscosity of 0.002 kg m-1s-1 is mixed at 120 rpm. If the fluid is mixed with an impeller having diameter 50 cm, then the Reynolds number of the liquid in the reactor is

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Question: A stirred tank reactor containing a fluid with a density of 2.5 g.ml-1 and viscosity of 0.002 kg m-1s-1 is mixed at 120 rpm. If the fluid is mixed with an impeller having diameter 50 cm, then the Reynolds number of the liquid in the reactor is
[A].

2500

[B].

100

[C].

12,50,000

[D].

1,000,000

Answer: Option C

Explanation:

No answer description available for this question.

Mixing in stirred tank reactors can

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Question: Mixing in stirred tank reactors can
[A].

be described as either laminar, transient or turbulent

[B].

achieve turbulent conditions by increasing the stirrer speed

[C].

induce laminar flow conditions by the addition of baffles

[D].

all of the above

Answer: Option A

Explanation:

No answer description available for this question.

Toxins accumulated in a reactor can lead to low biomass yields probably due to which of the following?

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Question: Toxins accumulated in a reactor can lead to low biomass yields probably due to which of the following?
[A].

NAD+ is diverted away from homeostasis to anabolism

[B].

ATP is diverted away from homeostasis to anabolism

[C].

NAD+ is diverted away from anabolism to homeostasis

[D].

ATP is diverted away from anabolism to homeostasis

Answer: Option D

Explanation:

No answer description available for this question.

When the product formation is approximately equal to the rate of cell growth, the pattern of product formation is termed as

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Question: When the product formation is approximately equal to the rate of cell growth, the pattern of product formation is termed as
[A].

uncoupled

[B].

growth associated

[C].

non-growth associated

[D].

metabolically uncoupled

Answer: Option B

Explanation:

No answer description available for this question.

When a culture of fermenting yeast becomes metabolically uncoupled, ethanol

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Question: When a culture of fermenting yeast becomes metabolically uncoupled, ethanol
[A].

becomes a secondary metabolite

[B].

production becomes growth associated

[C].

production becomes non-growth associated

[D].

becomes a growth nutrient

Answer: Option C

Explanation:

No answer description available for this question.

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

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Question: 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

Answer: Option A

Explanation:

No answer description available for this question.