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

Read the following statement having two blanks (A and B):

''A drug used for ______ (A)___ patients is obtained from a species of the organism ______ (B)___ ''. The one correct option for the two blanks is:

An example of endomycorrhiza is:

1. Glomus

2. Agaricus

3. Rhizobium

4. Nostoc

Domestic sewage in large cities:

Bacillus thuringiensis (Bt) strains have been used for designing novel:

1. Bioinsecticidal plants

2. Bio-mineralization processes

3. Biofertilizers

4. Bio-metallurgical techniques 

Which of the following yields citric acid?
1.  Penicillium citrinum
2. Aspergillus niger
3. Saccharomyces
4.  Azospirillium

Saccharomyces cerevisiae is used in the formation of:
1. Ethanol
2. Methanol
3. Acetic acid
4. Antibiotics

The dough kept overnight in warm weather becomes soft and spongy because of:

1. Fermentation

2. Cohesion

3. Osmosis

4. Absorption of carbon dioxide from the atmosphere

Which one of the following pairs is not correctly matched:

1. Serratia – Drug addiction

2. Spirulina – Single-cell protein

3. Rhizobium – Biofertilizer

4. Streptomyces – Antibiotic 

A major component of gobar gas is:

1. Methane

2. Ethane

3. Butane

4. Ammonia