Ernest Chain and Howard Florey's contribution was
discovery of streptokinase
establishing the potential of penicillin as an effective antibiotic
discovery of the DNA sequencer
isolating the bacterial plasmid
isolating the bacterial plasmid
B.
establishing the potential of penicillin as an effective antibiotic
Pencillin was the first antibiotic to be discovered by Alexander Fleming in 1928. The antibiotic was however, commerically extracted by efforts of Chain and Florey and was extensively used in treating wounded soldiers in World War II. Fleming, Chain and Florey were awarded Noble Prize in 1945.
The microbial biocontrol agent for butterfly caterpillar is
Bacillus thuringiensis
Sacchromyces
Lactobacillus
Cyanobacteria
Cyanobacteria
Match the following organisms with the products they produce.
| A. Lactobacillus | i. Cheese |
| B. Saccharomyces cerevisiae | ii. Curd |
| C. Aspergillus niger | iii. Citric acid |
| D. Acetobacter aceti |
iv. Bread v. Acetic acid |
Select the correct option.
A - ii; B - iv; C - iii; D - v
A - iii; B - iv; C - v; D - i
A - ii; B - i; C - iii; D - v
A - ii; B - iv; C - v; D - iii
Which of the following microbes is used for the commercial production of ethanol?
Clostridium butylicum
Trichoderma polysporum
Monascus purpureus
Saccharomyces cerevisiae
Saccharomyces cerevisiae
| Column I | Column II |
| i. Statins | A. Propionibacterium shermanii |
| ii. Swiss cheese | B. Streptococcus |
| iii. Cyclosporin A | C. Aspergillus niger |
| iv. Citric Acid | D. Trichoderma polysporum |
| v. Clot buster | E. Monaseus purpureus |
i - E; ii - A; iii - D; iv - C; v - B
i - B; ii - A; iii - D; iv - D; v - C
i - C; ii - A; iii - B; iv - C; v - D
i - C; ii - E; iii - A; iv - D; v - B
i - C; ii - E; iii - A; iv - D; v - B
Chloromycetin is obtained from
Streptomyces venezuelae
Streptomyces rimosus
Bacillus subtilis
Clostridium botulinum
Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for
used as a fertilizer
Construction of roads
Making tubes and pipes
Making plastic sacks
Select the incorrect statement.
Inbreeding is essential to evolve purelines in any animal.
Inbreeding selects harmful recessive genes that reduce fertility and productivity
Inbreeding helps in accumulation of superior genes and elimination of undesirable genes.
Inbreeding increases homozygosity
Select the correct group of biocontrol agents.
Trichoderma, Baculovirus, Bacillus thuringiensis
Oscillatoria, Rhizobium, Trichoderma
Nostoc, Azospirillium, Nucleopolyhedrovirus
Bacillus thuringiensis, Tobacco Mosaic Virus, Aphids
Viruses of the genus Nucleopolyhedrovirus are employed as
Gobar gas producers
Biological control agents
Anaerobic sludge digesters
Antibiotics
Antibiotics
