Name the activity by which the leaves of tea, tobacco etc are fermented.
Bacillus megaterium
Psedomonas
Methanogens
Nitrosomonas
Which process is used to preserve milk.
canning
refrigeration
heating
pasteurisation
Name the organisms which is considered as being on the border line between living and non living organisms.
bacteria
virus
fungi
algae
Name the cariers of disease organisms.
Parasites
Vectors
Pathogens
Microbes
Why are viruses very much used as biological research tools?
They have ability to pass on genetic information from one cell to another cell.
Due to their simplicity of structure and rapid multiplication.
They are used in eradicating harmful parts.
They are used to produce vaccine
Name the species of bacteria which cause the disease 'citrus canker'
Xanthomonas citri
Xanthomonas oryzae
Pseudomonas spp
Solanacearum
From which micro organisms penicillin is being manufactured?
Bacteria
Algae
Fungi
Virus
Name a good preservative.
Oxalic acid
Vinegar
Butyl alcohol
Methyl alcohol
Which gas is liberated by the conversion of sugar solution into alcohol.
Oxygen
Carbondioxide
Carbon monoxide
Nitrogen
Name a nitrogen-fixing bacteria
Bacillus ramosus
Nitro bacter
Acetobacter
