Industrially Useful Microbial Processes
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The
recovery of vitamin from fermentation broth is carried out prior to_____________.
a.
Acidification
b.
Alcohol treatment
c.
Autolysis
d. None
of these
Naringinase,
an enzyme commonly used for removal of bitter taste from citrus juice is
obtained from_____________.
a.
A. niger
b.
A.flavus
c. A.
oryzae
d. S.
cerevisiae
Protease,
which is used for flavouring of sake and haze removal in sake is produced by_____________.
a.
A. oryzae
b. A.
flavus
c. B.
cereus
d. A.
niger
The
organism commonly used for the production of β carotene is/ are_____________.
a.
Phycomyces blakesleeanus
b.
Cnoanephora cucurbitarum
c.
Blakeslea trispora
d.
all of these
The
organism commercially used for fungal fermentation to obtain citric acid is_____________.
a. A.
oryzae
b.
A.flavus
c.
A. niger
d. S.
cerevisiae
Erythromycin
a broad spectrum antibiotic is obtained with the help of_____________.
a.
Streptomyces rimosus
b.
Streptomyces venezuelae
c.
Streptomyces erythreus
d.
Streptomyces halstedii
The
penicillin F which was produced at first, required the mold_____________.
a.
Penicillium chrysogenum
b.
Pencillium notatum
c.
Pencillium chrysogenum Q-176
d. none
of the above
Amyloglucosidase
is used in glucose production. It is produced by_____________.
a.
Rhizopus niveus
b.
Endomycopsis fibuliger
c.
Sclerotina libertina
d.
both (a) and (b)
Microbially
produced streptokinase is used to_____________.
a.
remove spots from laundry products
b.
dissolve clots for patients with coronary blockages
c.
clarify fruit juice
d.
breakdown starch molecules into smaller sugars
Anaerobic
bacteria undergoes butyric isopropyl fermentation in carbohydrates to yield_____________.
a.
glycol
b.
butyric acid
c.
acetic acid
d.
all of these
The
other name of invertase enzyme is_____________.
a.
sucrase
b.
saccharase
c.
isomerase
d.
both (a) and (b)
Neomycin-B
is obtained from_____________.
a.
Streptomyces niveus
b.
Streptomyces fradiae
c.
Streptomyces spheroides
d.
Streptomyces griseus
Which
of the following cephalosporin is more active than penicillin against various
species of Salmonella?
a.
Cephalosporin N
b.
Cephalosporin C
c.
Synnematin
d.
Both (a) and (c)
The
beet molasses is pretreated with __________ to reduce great quantity of trace
metals.
a.
ferrocyanide or ferricyanide
b.
ethylenediamine tetrachloro acetic acid
c.
hydrochloric acid
d.
sulphuric acid
The
medium required for glutamic acid mainly consist of_____________.
a.
glucose
b.
molasses
c.
sucrose
d.
lactose
Flavor
can be enhanced from the_____________.
a.
L-Alanine
b.
D-L-Alanine
c.
L-Aspartic acid
d.
all of these
Bacillus
thuringiensis is useful as a bacterial_____________.
a.
source of antibiotics
b.
producer of vitamins
c.
herbicide
d.
pesticide
In
Corynebacterium glutamicum, tryptophan biosynthesis is regulated by the
activity of_____________.
a. DAHP
synthetase
b.
Anthranilate synthase
c.
Both (a) and (b)
d.
Phosphoenol pyruvate
Invertase
has its application in confectionaries to prevent crystallization of sugar. It
is obtained from_____________.
a. A.
oryzae
b. A.
niger
c.
S. cerevisae
d. B.
subtilis
The
method used for obtaining citric acid as fermentation product are commonly
known as_____________.
a.
submerged aerated fermentation
b.
stationary tray fermentation
c.
both (a) and (b)
d. none
of these
Who
was the first scientist to observe the antibiotic and therapeutic properties of
penicillin?
a.
Louis Pasteur
b.
Alexander Fleming
c. S.
C. Prescott
d. E.
P. Abraham
Which
of the following organism is utilized to obtain commercial L-lysine by direct
method?
a.
Micrococcus glutamicus
b.
Mutated strain of Micrococcus glutamicus
c.
Brevibacterium aminogenes
d.
Mutated strain of Brevibacterium aminogenes
"Vinegar
mother" in Orleans process is_____________.
a.
inoculum of acetobacter bacteria used
b.
considerable slime and film growth of Acetobacter bacteria on the surface of
the alcoholic broth
c.
cellulosic strands produced by Acetobacter bacteria to hold cells together
d. none
of the above
Commercial
scale production of amino acids is typically carried out using_____________.
a.
regulatory mutants to cause overproduction of biochemical intermediates
b.
creation of an intentional increase in membrane permeability to increase
release of the amino acids
c.
both (a) and (b)
d. none
of the above
Which
of the following microorganism can yield vitamin B12 using methanol as a carbon
source?
a.
Methanobacterium soehngenii
b.
Methanobacillus omelianski
c.
Protaminobacter ruber
d.
All of the above
The
immediate precursor for glumatic acid production by Corynebacterium glutamicum
is_____________.
a.
lysine
b.
oxoacetate
c.
citrate