Important biofertilizers in paddy fields are:
1. Cyanobacteria
2. Rhizobia
3. Frankia
4. Nitrobacter and Nitrosomanas

An example of endomycorrhiza is:

1. Glomus

2. Agaricus

3. Rhizobium

4. Nostoc

Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?
1. Aspergillus niger – citric acid
2. Yeast – statins
3. Acetobacter aceti – acetic acid
4. Clostridium butylicum – lactic acid

Consider the given two statements:
I. Coliform bacteria are a commonly used indicator of sanitary quality of foods and water.
II. Coliforms cause a number of serious illness.

1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct and II is incorrect
4. Both I and II are incorrect

Beauveria, Metarhizium, and Paecilomyces are:
1. Mycorrhizal fungi
2. Biofertilizers
3. Entomopathogenic fungi
4. Edible fungi

Identify the incorrectly matched pair:

Nystatin, amphotericin B, and natamycin are antibiotics produced by different species of Streptomyces and are:
1. Anti fungal drugs
2. Anti bacterial drugs
3. Anti protozoan drugs
4. Anti cancer drugs

Among the following pairs of microbes, which pair has both the microbes that can be used as biofertilizers?

1. Aspergillus and Rhizopus

2. Rhizobium and Rhizopus

3. Cyanobacteria and Rhizobium

4. Aspergillus and Cyanobacteria

Which of the following statements about methanogens is not correct?