question_answer 41)

  Write the most important characteristic that Aspergillusniger, Clostridium butylicum, and Lactobacillus share.

Answer:

                  Their common characteristic is that they produce organic acids as part of their metabolism and are therefore, used for commercial and industrial production of the same. (i) Aspergillusniger (a fungus) for citric acid. (ii) Clostridium butylicum (a bacterium) for butyric acid. (iii) Lactobaacillus (a bacterium) for lactic acid.