Industrially Useful Microbial Processes
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The
method of distillation used to obtain alcohol greater than 95 percent is called____________.
a.
fractional distillation
b.
flash evaporation
c.
azeotropic distillation
d.
successive distillation
The
micro-organism used for industrial production of lactic acid using corn
dextrose as media is____________.
a.
Lactobacillus bulgaricus
b.
Lactobacillus delbrueckii
c.
Lactobacillus pentosus
d.
Streptococcus lactis
Which
of the following species is used for vitamin B12 production by fermentation
process?
a.
Streptomyces griseus
b.
Streptomyces olivaceus
c.
Bacillus megaterium
d.
All of these
The
organisum used for production of streptomycin is____________.
a.
Streptomyces rimosus
b.
Streptomyces griseus
c.
Streptomyces aureofaciens
d.
Streptomyces erythreus
Which
of the following is true about β-ionone, non-ionic detergent used in β carotene
fermentation medium?
a. It
is a precursor of β-carotene fermentation process
b.
It is regarded as "steering" factor associated with bringing about
the presence and activity of the enzymes responsible for β-carotene
formation
c. It
is an inducer of β carotene fermentation process
d. None
of the above
Glucoseoxidase,
which had been commercially employed to remove glucose from egg white and whole
eggs before drying is obtained by submerged aerated fermentation using____________.
a.
A. niger
b. B.
subtilis
c. B.
cereus
d. A.flavus
Which
of the following are commercially used for bacterial amylases production?
a.
Bacillus subtilis
b.
Bacillus diastaticus
c.
Clostridium acetobutylicum
d.
Both (a) and (b)
An
"International Unit" of penicillin activity established in 1944 is
amount of penicillin equivalent to____________.
a.
0.6 micrograms of crystalline penicillin G of about 98% purity
b. 0.6
micrograms of crystalline penicillin F of about 98% purity
c. 0.8
micrograms of crystalline penicillin G of about 98% purity
d. 0.8
micrograms of crystalline penicillin G of about 90% purity
The
man who first discovered the chemical that causes souring of milk was____________.
a.
Pasteur
b.
Scheele
c.
Watson
d.
Ronald Ross
Which
of the following is not a penicillin?
a.
Penicillin G
b.
Penicillin X
c.
Penicillin V
d.
Penicillin Y
Malt
used to ferment beer is prepared by____________.
a.
roasting barley
b.
washing the barley with water and drying it in air
c.
soaking barley in water followed by germination and drying
d.
treating barley with bovine amylase followed by roasting
Penicillin
was first produced commercially using____________.
a.
stationary mat culture
b. deep
tank aerated fermentations
c.
continuous fermentation
d. none
of the above
The
present day high yielding penicillin are obtained from____________.
a.
Penicillium chrysogenum (NRRL, 1951)
b.
Penicillium chrysogenum (Q-176)
c.
Penicillium chrysogenum (Q-179)
d. none
of the above
The
medium utilized for fungal citric acid production should be deficient in____________.
a.
phosphate
b.
manganese
c. iron
d.
all of these
Which
of the following is a cephalosporin?
a.
Cephalosporin N
b.
Synnematin
c.
Cephalosporin C
d.
All of these
Cephalosporin
an antibiotic closely related to penicillin in structure and antibiotic
activity are produced by species of____________.
a.
Cephalosporium
b.
Cephalospodium
c.
Pseudomonas
d.
Bacillus
The
production of alcohol from lactose of whey is generally carried out by____________.
a.
Saccharomyces cerevisiae
b.
Candida pseudotropicalis
c.
Candida utilis
d. none
of these
The
precursor used for production of vitamin B12 by Streptomyces olivaceus is____________.
a.
cobalt chloride
b.
cobalt sulphate
c.
calcium chloride
d.
calcium sulphate
Most
biopolymers produced by micro-organisms are____________.
a. cell
wall constituents
b.
nucleic acids
c.
histones
ans
d. exopolysaccharides
Microbial
rennet, which is used in cheese manufacture is produced by____________.
a.
Mucor spp
b.
Aspergillus spp
c.
Bacillus spp
d.
Saccharomyces spp
Production
of L-lysine can be carried out by____________.
a. C. glutamicum
b. B.
flavum FA 1-30
c. B.
flavum
d.
All of these
The
citric acid is recovered from the fermentation broth as____________.
a.
calcium citrate
b.
magnesium citrate
c. zinc
citrate
d. none
of these
The
sulphite waste liquor fermentation employs use of Candida utilis because of its
ability to ferment____________.
a.
sucrose
b.
pentose
c.
glucose
d.
maltose
Which
of the following organisms have shown the ability of phosphate solubilization
in red wine?
a.
S.cerevisiae
b.
Gluconobacter oxydans
c.
Bacillus subtilis
d. None
of these
Which
of the following is not a principal media for industrial alcohol production by
fermentation?
a.
Black strap molasses
b.
Sulphite waste liquor
c. Wood
waste
d.
Glucose
The
first commercial fermention carried out to obtain L-lysine is known as____________.
a. dual
fermentation
b.
indirect fermentation
c.
direct fermentation
d.
both (a) and (b)
The
precursor of Penicillin G is____________.
a.
phenoxy acetic acid
b.
phenyl acetic acid
c.
hydroxy phenyl acetic acid