Question

Vitamin $B_{12}$ is synthesized by

• A. Saccharomyces
• B. Acetobacter
• C. Agaricus
• D. All of the above

Answer 1

The correct option is D All of the above

Plants and animals do not have the capacity to synthesize vitamin B12 by their own. But the microorganisms like Saccharomyces cerevisiae ( contains vitamin B12 but there is no clear answer about the source of synthesizing vitamin B12 in this yeast. But it synthesizes vitamin B12.), acetobacter and also by the mushrooms Agaricus. Thus, the correct answer is option D.