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Biotechnology - 37
Media composition for the production of streptomycin is A. soybean meal, glucose, peptone, malt extract, sodium chloride B. soybean meal, glucose, peptone, malt extract, ammonium chloride C. soybean meal, glucose, peptone, malt extract, calcium carbonate D. soybean meal, glucose, peptone, malt extract, ammonium sulphate.... Which of the following organism(s) produce(s) tetracycline? A. Steptomyces aureofaciens B. Steptomyces ramosus C. Nocardia sulphurea D. All of these View Answer Workspace Report Discuss in Forum Media used for the production of chlorotetracyclin consists of A. sugar, corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl B. corn steep liquor, CaCO3 and (NH4)2SO4 C. sugar, CaCO3 and (NH4)2SO4 D. corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl.....
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Số câu hỏi: 10.   Tổng điểm: 10
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Cỡ chữ câu hỏi:  Cỡ chữ đáp án:
1-
Media composition for the production of streptomycin is
A-
soybean meal, glucose, peptone, malt extract, sodium chloride
B-
soybean meal, glucose, peptone, malt extract, ammonium chloride
C-
soybean meal, glucose, peptone, malt extract, calcium carbonate
D-
soybean meal, glucose, peptone, malt extract, ammonium sulphate
2-
Which of the following organism(s) produce(s) tetracycline?
A-
Steptomyces aureofaciens
B-
Steptomyces ramosus
C-
Nocardia sulphurea
D-
All of these
3-
Media used for the production of chlorotetracyclin consists of
A-
sugar, corn steep liquor, CaCO3, (NH4)2SO4 and NH4Cl
B-
corn steep liquor, CaCO3 and (NH4)2SO4
C-
sugar, CaCO3 and (NH4)2SO4
D-
corn steep liquor, CaCO3, (NH4)2SO4 and NH4Cl
4-
Which of the following precursor is added in the medium to get penicillin G?
A-
Phenyl carbamic acid
B-
Phenyl acetic acid
C-
Ammonium sulphate
D-
Ammonium chloride
5-
High yield of chlorotetracyclin requires
A-
no aeration
B-
continuous aeration
C-
aeration which does not affect the yield
D-
controlled aeration
6-
Streptomycin is produced by
A-
S. griseus
B-
S. griseoflavus
C-
S. aerofaciens
D-
S. ramosus
7-
Which of the following event occurs during second phase of growth of P. chrysogenum?
A-
Synthesis of penicillin is high
B-
Mycelial mass increases
C-
pH increase
D-
Both (a) and (b)
8-
Inoculum preparation for the fermentation medium for penicillin takes place on
A-
wheat seeds
B-
barley seeds
C-
rice seeds
D-
All of these
9-
Antibiotics are typically produced in fed batch reactors because
A-
antibiotic yields are generally higher when cells enter the stationary phase
B-
the precursors are often toxic to the cells
C-
antibiotic yields are generally higher when cell growth slows
D-
All of the above
10-
Which of the following event occurs during third phase of growth of P chrysogenum?
A-
Concentration of antibiotic increases in the medium
B-
Autolysis of the medium starts
C-
Slight rise in pH due to liberation of ammonia
D-
All of the above
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