Which scientist(s) pointed out that the stationary phase is a misnomer in terms of the physiology of organism?
Anonymous Quiz
15%
Burrow et al.
54%
Bu’Lock et al.
15%
Bull
15%
Monod
Borrow et al. investigated the biosynthesis of Gibberellic acid by Gibberella fujikuroi and divided growth of organisms into balanced, storage and maintenance phase. What do you mean by storage phase?
Anonymous Quiz
48%
The phase equivalent to the early to middle exponential phase
21%
The phase equivalent to the late exponential phase
21%
The phase equivalent to the stationary phase
9%
The phase equivalent to the lag phase
During continuous culture/fermentation, nutrients in the fermenter are utilized at a fast rate.
Anonymous Quiz
78%
True
23%
False
Which scientist(s) gave a full kinetic description of external and internal feedback system?
Anonymous Quiz
31%
Monod
28%
Pirt
15%
Bull
26%
Harte and Webb
A multistage system is shown below. Label the stages 1 and 2.
Anonymous Quiz
30%
1-Medium inlet and 2-culture effluent
37%
1-Mixing chamber and 2-culture effluent
27%
1-Medium inlet and 2-Liquid reservoir
7%
1-Culture effluent and 1-Medium Inlet
All the constituents of medium are excess in _______
Anonymous Quiz
20%
Chemostat
30%
Turbidostat
36%
Batch culture
14%
Fed-Batch culture
Which of the following is NOT correct for Continuous fermentation?
Anonymous Quiz
57%
Setup is not changed from outside once the fermentation has started
17%
Nutrients are added many times
14%
Closer to the natural environment
11%
The small size of fermenters are required
Who introduced the term “Fed-Batch”?
Anonymous Quiz
30%
Burrow et al.
46%
Bu’Lock et al.
19%
Yoshida et al.
5%
Maniatis et al.
Which scientist(s) described the kinetics of variable-volume fed-batch culture?
Anonymous Quiz
27%
Dunn and Mor
39%
Maniatis et al.
24%
Van’t Hoff
9%
Maxwell
❤1
Which of the following does not include in the range of fermentation processes?
Anonymous Quiz
20%
Microbial Enzymes
40%
Microbial metabolites
27%
Biotransformation
13%
Recombinant DNA
In fixed-volume fed-batch culture, volume changes with fermentation time due to the substrate feed.
Anonymous Quiz
82%
True
18%
False
Cyclic Fed-Batch culture has been used for the production of _______
Anonymous Quiz
19%
Bovine serum albumin
39%
Penicillin
32%
Human serum albumin
10%
Cheese Production
The feed solution in fed-batch culture is highly concentrated to _______
Anonymous Quiz
8%
avoid dilution of the bioreactor
60%
maintain low cell density in bioreactor
16%
avoid lag phase
16%
increase productivity
Which of the following method is not used in isolation and screening of desired microorganisms?
Anonymous Quiz
25%
Crowded plate technique
28%
Auxanographic technique
22%
Enrichment Culture technique
25%
Hanging Drop technique
❤1
The screening is isolation and detection of microorganisms of interest.
Anonymous Quiz
87%
True
13%
False
Which of the following shows the zone of inhibition when a particular organism is grown on a Petri plate?
Anonymous Quiz
21%
Growth Factor producers
54%
Antibiotic producers
18%
Organic acid producers
7%
Amino acid producers
The prototrophs are the organisms which are not capable of synthesizing all growth requirements for themselves.
Anonymous Quiz
71%
True
29%
False
Which of the following plate is used to detect and isolate organic acid producers?
Anonymous Quiz
18%
Phenol red plate
40%
Potato Dextrose Agar plate
33%
MacConkey’s Agar plate
10%
Rose Bengal Agar plate
Which scientists gave the details of the techniques of preservation?
Anonymous Quiz
22%
Jacob and Monod
27%
Kirsop and Doyle
33%
William and Wilkins
18%
Boliver and Rodriguez