2. The puffed up appearance of dough is due to the production of C02 gas by yeast, Saccharomyces cerevisiae.
3. Methane, H2S and C02 are produced during microbial digestion of organic compounds in case of secondary treatment of sewage.
(ii) Cephalosporium
Example : Penicillin produced by Penicillium chrysogenum is active against various species of Staphylococci and Streptococci.
Name some traditional Indian foods made of wheat, rice and Bengal gram (or their products) which involve use of microbes.