Microbes in Human Welfare · Question 25

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

Read the following four statements (A-D) : How many of the above statements are wrong ?

1. Two
2. One
3. Four
4. Three

Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition?

1. Azotobacter
2. Aspergillus
3. Glomus
4. Trichoderma

Monascus purpureus is a yeast used commercially in the production of:

1. Ethanol
2. Streptokinase for removing clots from the blood vessels
3. Citric acid
4. Blood cholesterol lowering statins

A patient brought to a hospital with myocardial infarction is normally immediately given

1. Penicillin
2. Streptokinase
3. Cyclosporin A
4. Statins

A nitrogen-fixing microbe associated with Azolla in rice fields is

1. Tolypothrix
2. Spirulina
3. Frankia
4. Anabaena

Which one of the following is an example of carrying out biological control of pests/diseases using microbes?

1. Trichoderma sp. against certain plant pathogens
2. Ladybird beetle against aphids in mustard
3. Nucleopolyhedrovirus against white rust in Brassica
4. Bt-cotton to increase cotton yield