Microbes in Human Welfare

Which of the following in sewage treatment removes suspended solids ?

1. Secondary treatment
2. Tertiary treatment
3. Primary treatment
4. Sludge treatment

Which of the following is correctly matched for the product produced by them ?

1. Acetobacter aceti : Antibiotics
2. Penicillium notatum : Acetic acid
3. Methanobacterium : Lactic acid
4. Saccharomyces cerevisiae : Ethanol

Which of the following is wrongly matched in the given table?

1. Microbe - Streptococcus, Product - Streptokinase, Application - Removal of clot from blood vessel
2. Microbe - Trichoderma polysporum, Product - Cyclosporin A, Application - Immunosuppressive drug
3. Microbe - Monascus purpureus, Product - Statins, Application - Lowering of blood cholesterol
4. Microbe - Clostridium butylicum, Product - Lipase, Application - Removal of oil stains

Match the following list of microbes and their importance -

1. (a) - (iii), (b) - (i), (c) - (iv), (d) - (ii)
2. (a) - (iii), (b) - (iv), (c) - (i), (d) - (ii)
3. (a) - (iv), (b) - (ii), (c) - (i), (d) - (iii)
4. (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)

The guts of cow and buffalo possess

1. Cyanobacteria
2. Fucus sp.
3. Methanogens
4. Chlorella sp.

What gases are produced in anaerobic sludge digesters ?

1. Methane and CO2 only
2. Methane, Hydrogen Sulphide and O2
3. Methane, Hydrogen Sulphide and CO2
4. Hydrogen Sulphide and CO2

A good producer of citric acid is

1. Clostridium
2. Saccharomyces
3. Aspergillus
4. Pseudomonas

Microbe used for biocontrol of pest butterfly caterpillars is :

1. Streptococcus sp.
2. Trichoderma sp.
3. Saccharomyces cerevisiae
4. Bacillus thuringiensis

In gobar gas, the maximum amount is that of :

1. Propane
2. Butane
3. Methane
4. Carbon dioxide

The domestic sewage in large cities :

1. has very high amounts of suspended solids and dissolved salts
2. has a high BOD as it contains both aerobic and anaerobic bacteria.
3. is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plant (STPs)
4. When treated in STPs does not really require the aeration step as the sewage contains adequate oxygen