81.

Chloromycetin is obtained from

• Streptomyces venezuelae

• Streptomyces rimosus

• Bacillus subtilis

• Clostridium botulinum

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

Viruses of the genus Nucleopolyhedrovirus are employed as

• Gobar gas producers

• Biological control agents

• Anaerobic sludge digesters

• Antibiotics

• Antibiotics

The microbial biocontrol agent for butterfly caterpillar is

• Bacillus thuringiensis

• Sacchromyces

• Lactobacillus

• Cyanobacteria

• Cyanobacteria

Which of the following microbes is used for the commercial production of ethanol?

• Clostridium butylicum

• Trichoderma polysporum

• Monascus purpureus

• Saccharomyces cerevisiae

• Saccharomyces cerevisiae

• 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

Select the correct group of biocontrol agents.

• Trichoderma, Baculovirus, Bacillus thuringiensis

• Oscillatoria, Rhizobium, Trichoderma

• Nostoc, Azospirillium, Nucleopolyhedrovirus

• Bacillus thuringiensis, Tobacco Mosaic Virus, Aphids

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

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

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