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Recent activity in Bioprocess Engineering and Process Biotechnology
0
votes
0
answers
1
GATE2021
A batch cultivation of E. coli follows zeroth order Monod's growth kinetics. The cell growth is terminated when the residual dissolved oxygen concentration attains 10% of its saturation value and oxygen mass transfer coefficient ( ) L k a reaches its maximum value ( ) 1 ... the final cell concentration in 3 kg m− (rounded off to two decimal places) at the end of the batch cultivation is _
A batch cultivation of E. coli follows zeroth order Monod’s growth kinetics. The cell growth is terminated when the residual dissolved oxygen concentration attains 10% ...
DARSHAN KJ
120
points
DARSHAN KJ
asked
Oct 20, 2023
–1
votes
1
answer
2
GATE2013-48
A solution was prepared by dissolving $\text{100 mg}$ of protein $X$ in $\text{100 ml}$ of water. Molecular weight of protein $X$ is $\text{15,000 Da};$ Avogadro’s number = $6.022\times 10^{23}$. Calculate the molarity$(\mu M)$ of the resulting solution. $66.6$ $6.6$ $0.67$ $0.067$
A solution was prepared by dissolving $\text{100 mg}$ of protein $X$ in $\text{100 ml}$ of water. Molecular weight of protein $X$ is $\text{15,000 Da};$ Avogadro’s numb...
vidushi chauhan
140
points
vidushi chauhan
answered
Aug 28, 2023
Bioprocess Engineering and Process Biotechnology
gate2013
molarity-problems
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–1
votes
0
answers
3
How yeast used for whisky production is different from the baker’s yeast and brewer’s yeast?
Deepika sharma gq
110
points
Deepika sharma gq
asked
May 11, 2022
0
votes
0
answers
4
GATE2014-12
The degree of reduction of ethanol is_______
The degree of reduction of ethanol is_______
Lakshman Bhaiya
1.4k
points
Lakshman Bhaiya
retagged
Mar 18, 2021
Bioprocess Engineering and Process Biotechnology
gate2014
degree-of-reduction-of-elements
numerical-answers
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–
0
votes
4
answers
5
GATE2014-8
In a batch culture of Penicillium chrysogenum, the maximum penicillin synthesis occurs during the lag phase exponential phase stationary phase death phase
In a batch culture of Penicillium chrysogenum, the maximum penicillin synthesis occurs during thelag phaseexponential phasestationary phasedeath phase
Seema MP
140
points
Seema MP
answered
Feb 16, 2021
Bioprocess Engineering and Process Biotechnology
gate2014
batch-column
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0
votes
1
answer
6
GATE2013-47
A fed batch culture was operated with intermittent addition of glucose solution at a flow rate of $\text{200 ml h}^{-1}$. The values of $K_s,\: \mu_m$ and $D$ are $\text{0.3 g l}^{-1}, 0.4\:h^{-1}$ and $\text{0.1 h}^{-1}$, respectively. Determine the concentration of growth limiting substrate $(gl^{-1})$ in the reactor at quasi-steady state. ______________
A fed batch culture was operated with intermittent addition of glucose solution at a flow rate of $\text{200 ml h}^{-1}$. The values of $K_s,\: \mu_m$ and $D$ are $\text{...
soujanyareddy13
2.7k
points
soujanyareddy13
reshown
Feb 16, 2021
Bioprocess Engineering and Process Biotechnology
gate2013
fedbatch-reactors
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0
votes
0
answers
7
GATE2014-10
Which of the following is employed for the repeated use of enzymes in bioprocesses? polymerization immobilization ligation isomerization
Which of the following is employed for the repeated use of enzymes in bioprocesses?polymerizationimmobilizationligationisomerization
go_editor
1.4k
points
go_editor
retagged
Dec 31, 2020
Bioprocess Engineering and Process Biotechnology
gate2014
enzymes
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0
votes
1
answer
8
GATE2018-50
At the end of a batch culture, glucose solution is added at a flow rate of $200 \: ml/h$. If the culture volume after $2$ h of glucose addition is $1000$ ml, the initial culture volume (in ml) is _________
At the end of a batch culture, glucose solution is added at a flow rate of $200 \: ml/h$. If the culture volume after $2$ h of glucose addition is $1000$ ml, the initial ...
go_editor
1.4k
points
go_editor
edited
Dec 18, 2020
Bioprocess Engineering and Process Biotechnology
gate2018
bioprocess
numerical-answers
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0
votes
0
answers
9
GATE2018-46
A microbial strain is cultured in a $100$ L stirred fermenter for secondary metabolite production. If the specific rate of oxygen uptake is $0.4 \: h^{-1}$ and the oxygen solubility in the broth is $8 $ ... $s^{-1}$) of oxygen required to achieve a maximum cell concentration of $12$ g/L is (up to two decimal places) ___________
A microbial strain is cultured in a $100$ L stirred fermenter for secondary metabolite production. If the specific rate of oxygen uptake is $0.4 \: h^{-1}$ and the oxygen...
go_editor
1.4k
points
go_editor
edited
Dec 18, 2020
Bioprocess Engineering and Process Biotechnology
gate2018
bioprocess
fermenter
numerical-answers
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0
votes
0
answers
10
GATE2018-45
An aqueous solution containing $6.8$ mg/L of an antibiotic is extracted with amyl acetate. If the partition coefficient of the antibiotic is $170$ and the ratio of water to solvent is $85$, then the extraction factor is ________
An aqueous solution containing $6.8$ mg/L of an antibiotic is extracted with amyl acetate. If the partition coefficient of the antibiotic is $170$ and the ratio of water ...
go_editor
1.4k
points
go_editor
edited
Dec 18, 2020
Bioprocess Engineering and Process Biotechnology
gate2018
bioprocess
technology
numerical-answers
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1
votes
0
answers
11
GATE2018-44
Moist heat sterilization of spores at $121 ^\circ C$ follows first order kinetics as per the expression: $\dfrac{dN}{dt}=-k_dN$ where, $N$ is the number of viable spores, $t$I is the time, $k_d$ is the rate constant and $\dfrac{dN}{dt}$ is the rate of ... the number of viable spores from an initial value of $10^{10}$ to a final value of $1$ is (up to two decimal places) __________
Moist heat sterilization of spores at $121 ^\circ C$ follows first order kinetics as per the expression: $$\dfrac{dN}{dt}=-k_dN$$ where, $N$ is the number of viable spore...
go_editor
1.4k
points
go_editor
edited
Dec 18, 2020
Bioprocess Engineering and Process Biotechnology
gate2018
bioprocess
technology
numerical-answers
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0
votes
0
answers
12
GATE2018-36
Shear stress versus shear rate behavior of four different types of fluids (I, II, III and IV) are shown in the figure below. Which one of the following options is correct? I-Newtonian, II-Bingham plastic, III-Dilatant, IV-Pseudoplastic I- ... -Bingham plastic I-Newtonian, II-Pseudoplastic, III-Bingham plastic, IV-Dilatant I-Newtonian, II-Bingham plastic, III-Pseudoplastic, IV-Dilatant
Shear stress versus shear rate behavior of four different types of fluids (I, II, III and IV) are shown in the figure below.Which one of the following options is correct?...
go_editor
1.4k
points
go_editor
edited
Dec 18, 2020
Bioprocess Engineering and Process Biotechnology
gate2018
bioprocess
engineering
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0
votes
0
answers
13
GATE2018-13
Which one of the following bioreactor configurations is the basis for a trickling biological filter? Stirred tank Packed bed Air lift Fluidized bed
Which one of the following bioreactor configurations is the basis for a trickling biological filter?Stirred tankPacked bedAir liftFluidized bed
go_editor
1.4k
points
go_editor
edited
Dec 14, 2020
Bioprocess Engineering and Process Biotechnology
gate2018
bioprocess
engineering
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0
votes
0
answers
14
GATE2013-46
The maximum cell concentration $(\text{g l}^{-1})$ expected in a bioreactor with initial cell concentration of $\text{1.75 g l}^{-1}$ and an initial glucose concentration of $\text{125 g l}^{-1}$ is ($Y_{X/S} = 0.6\:g\:cell/g$ substrate) ____________.
The maximum cell concentration $(\text{g l}^{-1})$ expected in a bioreactor with initial cell concentration of $\text{1.75 g l}^{-1}$ and an initial glucose concentration...
soujanyareddy13
2.7k
points
soujanyareddy13
edited
Nov 7, 2020
Bioprocess Engineering and Process Biotechnology
gate2013
bioreactor
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0
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0
answers
15
GATE2013-23
A batch bioreactor is to be scaled up from $\text{10 to 10,000}$ liters. The diameter of the large bioreactor is $10$ times that of the small bioreactor. The agitator speed in the small bioreactor is $\text{450 rpm}$. Determine the agitator speed (rpm) of the large bioreactor with same impeller tip speed as that of the small bioreactor. ____________
A batch bioreactor is to be scaled up from $\text{10 to 10,000}$ liters. The diameter of the large bioreactor is $10$ times that of the small bioreactor. The agitator spe...
soujanyareddy13
2.7k
points
soujanyareddy13
edited
Nov 5, 2020
Bioprocess Engineering and Process Biotechnology
gate2013
reactors
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0
votes
0
answers
16
GATE2013-22
A chemostat is operated at a dilution rate of $0.6\; h^{-1}$. At steady state, the biomass concentration in the exit stream was found to be $30\; gl^{-1}$The biomass productivity $(g\; l^{-1}h^{-1})$ after $3h$ of steady state operation will be ___________.
A chemostat is operated at a dilution rate of $0.6\; h^{-1}$. At steady state, the biomass concentration in the exit stream was found to be $30\; gl^{-1}$The biomass prod...
soujanyareddy13
2.7k
points
soujanyareddy13
edited
Nov 5, 2020
Bioprocess Engineering and Process Biotechnology
gate2013
dilution-problems
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–
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