Question

Vitamin $B_{12}$ is formed during fermentation of

• A. Ashbya gossypii
• B. Rhizopus stolonifer
• C. Propionibacteria
• D. Saccharomyces cerevisiae

Answer 1

The correct option is C Propionibacteria

Vitamin B${}_{12}$ is one of the important vitamins of B complex group. It is also known as cobalamin or cobamide.

Direct fermentation employing Bacillus megaterium, Propionibacterium freudenreichii, Propionibacterium shermanii and Pseudomonas is used for commercial production of vitamin B${}_{12}$.