Question

Choose the correct option-

A good producer of citric acid is?

• A. Pseudomonas
• B. Saccharomyces
• C. Aspergillus
• D. Clostridium

Answer 1

The correct option is C

Aspergillus

The correct option is C.

Explanation of Correct option

1. Aspergillus is a widespread mold species.
2. Aspergillus niger is used in the production of citric acid.
3. Citric acid is used in various food, beverage, cosmetic, pharmaceutical, and detergent industries.

Explanation of Incorrect option

Option A

1. Pseudomonas is a bacterium used for various biotechnological and bioremediation applications.
2. Pseudomonas putida is used to convert styrene oil into PHA, a biodegradable plastic.

Option B

1. Saccharomyces cerevisiae or yeast is used for the production of various metabolites, recombinant proteins, and biotransformation experiments.
2. Vitamins, food flavorings, insulin, interferons, fuel, solvents, pharmaceuticals, baker's yeast, potable ethanol products, etc., are all produced using yeast on a large scale.

Option D

1. Clostridium is a bacterium that grows in the complete absence of oxygen.
2. Clostridium acetobutylicum is used in the production of bulk chemicals and biofuels.

Final answer: Aspergillus is a good producer of citric acid.