Which of the following microbes is NOT involved in the preparation of household products? Choose the correct answer from the options given below:
- C and D only
- C and E only
- A and B only
- A and C only
Answer
(4) A and C only
Solution
Household products: Lactobacillus — curd; Saccharomyces cerevisiae — bread/idli/dosa dough; Propionibacterium sharmanii — Swiss cheese.
Aspergillus niger is used industrially for citric acid, and Trichoderma polysporum for the immunosuppressant cyclosporin A — not household products.
Hence, A and C.
Answer: (4)