A bacterial culture (200 μL containing 1.8 × 109 cells) was treated with an antibiotic Z (50 μg per mL) for 4 h at 37°C. After this treatment, the culture was divided into two equal aliquots.
Set A: 100 μL was plated on Luria agar.
Set B: 100 μL was centrifuged, the cell pellet washed and plated on Luria agar.
After incubating these two plates for 24 h at 37°C, Set A plate showed no colonies, whereas the Set B plate showed 0.9 × 109 cells. This experiment showed that the antibiotic Z is
A. Bacteriostatic
B. Bacteriocidal
C. Bacteriolytic
D. Apoptotic
Answer: Option A
This Question Belongs to Biotechnology Engineering >> Microbial Biotechnology
The precursor for penicillin-G biosynthesis during fermentation process is
A. Phenylacetic acid
B. Phenoxyacetic acid
C. Acetic acid
D. None of the above
Which of the following eukaryotic organisms has been proven to be of great industrial importance?
A. Penicillium chrysogenum
B. Saccharomyces cerevisiae
C. Bacillus subtilis
D. Streptomyces griseus
Oils rich in PUFA are not desirable for biodiesel production because
A. They form epoxides in presence of oxygen
B. They do not form epoxides in presence of oxygen
C. They have high ignition temperature
D. They solidify at low temperature
A. P-3, Q-1, R-4, S-2
B. P-3, Q-4, R-1, S-2
C. P-2, Q-3, R-1, S-4
D. P-2, Q-1, R-4, S-3
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