Microbes in Human Welfare · Question 39

The most common substrate used in distilleries for the production of ethanol is :

1. Ground gram
2. Molasses
3. Soyabean
4. Corn meal

Which one of the following is not a biofertilizer ?

1. Agrobacterium
2. Nostoc
3. Rhizobium
4. Mycorrhiza

Secondary sewage treatment is mainly a :

1. Mechanical process
2. Chemical process
3. Biological process
4. Physical process

Which of the following is mainly produced by the activity of anaerobic bacteria on sewage ?

1. Propane
2. Mustard gas
3. Marsh gas
4. Laughing gas

An organism used as a Biofertilizer for raising soyabean crop is :

1. Azotobacter
2. Azospirillum
3. Nostoc
4. Rhizobium

Ethanol is commercially produced through a particular species of :

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

Continuous addition of sugars in 'fed batch' fermentation is done to :

1. obtain antibiotics
2. produce methane
3. purify enzymes
4. degrade sewage

Organisms called Methanogens are most abundant in a :

1. Polluted stream
2. Hot spring
3. Cattle yard
4. Sulphur rock

Which one of the following helps in absorption of phosphorus from soil by plants?

1. Glomus
2. Rhizobium
3. Frankia
4. Anabaena

An example of endomycorrhiza is -

1. Nostoc
2. Rhizobium
3. Glomus
4. Agaricus