Question: Reynolds number for laminar flow over a plate should be less than
[A].500 mm
5 x 10-5
5 x 105
5 m
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Biochemical Engineering
Which of the following describes the detrimental effect of bubbles on animal cells?
Question: Which of the following describes the detrimental effect of bubbles on animal cells?
[A].Cells trapped on the surface of bubbles can be damaged when the bubbles explode, releasing their pressure and surface energies
Cells trapped in the moving foam can be dragged apart by the bubbles
Both (a) and (b)
Bubbles can explode in the liquid medium causing the release of ultraviolet radiation
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Filamentous fungal cells are more shear sensitive than bacterial cells because of
Question: Filamentous fungal cells are more shear sensitive than bacterial cells because of
[A].the presence of citin in cell walls of filamentous fungi
larger in size than bacterial cells and therefore are more susceptible to shear forces
fungal cells are much larger than bacterial cells
all of the above
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
The approach which is commonly used to determine the level of damage to animal cells in a culture medium is to monitor
Question: The approach which is commonly used to determine the level of damage to animal cells in a culture medium is to monitor
[A].the concentration of lactate in the medium
the level of lactate oxidase activity in the medium
the level of lactate dehydrogenase activity
the level of lactase activity in the medium
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Which of the following factors will affect the sensitivity of animal cells to shear conditions?
Question: Which of the following factors will affect the sensitivity of animal cells to shear conditions?
[A].Cell size
Availability of nutrients in the medium
The presence of shear protectorants in the medium
All of the above
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Animal cell cultures do not have much effect on shear forces because
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
cells are larger than the critical eddy size at which shear will have an effect
animal cells have cell walls
animal cells have cell membranes
[A].
[B].
[C].
[D].
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
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
100
12,50,000
1,000,000
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Which pattern of mixing is preferred in stirred tank reactors during the culture of aerobic microorganisms?
Question: Which pattern of mixing is preferred in stirred tank reactors during the culture of aerobic microorganisms?
[A].Laminar flow
Transient flow
turbulent flow
all of these
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Mixing in stirred tank reactors can
Question: Mixing in stirred tank reactors can
[A].be described as either laminar, transient or turbulent
achieve turbulent conditions by increasing the stirrer speed
induce laminar flow conditions by the addition of baffles
all of the above
[A].
[B].
[C].
[D].
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?
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
ATP is diverted away from homeostasis to anabolism
NAD+ is diverted away from anabolism to homeostasis
ATP is diverted away from anabolism to homeostasis
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.