Question: For a steady state condition, the change of substrate concentration (dCs/dt) is
[A].zero
1
>1
<1
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Biochemical Engineering
Which of the following is taken as an assumption in the distributed model?
Question: Which of the following is taken as an assumption in the distributed model?
[A].The reaction occurs at every position and the kinetics of the reaction are of the same form as observed for free enzyme.
Mass transfer through the immobilized enzyme occurs via molecular diffusion
There is no mass transfer limitation at the outside surface of the spherical immobilized enzyme
All of the above
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
To measure the extent to which the reaction rate is lowered because of resistance to mass transfer, the effectiveness factor of an immobilized enzyme, η can be defined as
Question: To measure the extent to which the reaction rate is lowered because of resistance to mass transfer, the effectiveness factor of an immobilized enzyme, η can be defined as
[A].reaction rate/rate if not slowed by diffusion
rate if not slowed by diffusion/ reaction rate
actual reaction rate/ rate if not slowed by diffusion
rate if not slowed by diffusion/ actual reaction rate
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
If Damkohler number, NDa >>1, the reaction rate is much greater than the mass transfer rate and the overall reaction is controlled by the rate of mass transfer. In this case, the enzyme reaction can be described as (where Csb and Cs are the substrate concentration in bulk of solution and at the immobilized enzyme surface respectively. ks mass transfer coefficient, and a is the surface area of an immobilized enzyme particles)
Question: If Damkohler number, NDa >>1, the reaction rate is much greater than the mass transfer rate and the overall reaction is controlled by the rate of mass transfer. In this case, the enzyme reaction can be described as (where Csb and Cs are the substrate concentration in bulk of solution and at the immobilized enzyme surface respectively. ks mass transfer coefficient, and a is the surface area of an immobilized enzyme particles)
[A].rp = ksa(Csb-Cs)
rp = ksaCsb
rp = ksaCs
rp = ksa(Csb+Cs)
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
For glucose isomerization by immobilized enzyme, the reactor generally used is
Question: For glucose isomerization by immobilized enzyme, the reactor generally used is
[A].CSTR
plug flow
packed bed
fluidized bed
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Which medium is used for the production of Penicillin using immobilized cells
Question: Which medium is used for the production of Penicillin using immobilized cells
[A].1% peptone medium
glucose medium
Yeast extract medium
LB broth
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
The support material for immobilization of cells of Bacillus subtilis is
Question: The support material for immobilization of cells of Bacillus subtilis is
[A].ion exchange resins
gelatin
Anthracite
agarose and carbodiimide
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
During the enzymatic reaction of an immobilized enzyme, the rate of substrate transfer is
Question: During the enzymatic reaction of an immobilized enzyme, the rate of substrate transfer is
[A].equal to that of substrate consumption
more than that of substrate consumption
lesser than that of substrate consumption
is nothing to do with the substrate consumption
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
The immobilized enzyme produced by micro encapsulation technique provides
Question: The immobilized enzyme produced by micro encapsulation technique provides
[A].an extremely large surface area
smaller surface area
high amount of solvent
relatively smaller surface area
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
The most commonly employed cross-linked polymer is the
Question: The most commonly employed cross-linked polymer is the
[A].polyacrylamide gel
collagen
celluloses
cation exchange resin
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.