Answer
Microbes Not Involved in Household Product Preparation
To determine which microbes are not involved in the preparation of household products, we must evaluate each organism’s common use:
-
A. Aspergillus niger – Used industrially for the production of citric acid.
It is not used in the preparation of household products.
✅ Not involved in household products. -
B. Lactobacillus – Plays an important role in curd formation, a common household activity.
❌ Involved in household products. -
C. Trichoderma polysporum – Produces the immunosuppressive drug Cyclosporin A.
This has no role in household product preparation.
✅ Not involved in household products. -
D. Saccharomyces cerevisiae – Known as baker’s yeast, it is used in baking and alcohol fermentation,
both of which are common in households.
❌ Involved in household products. -
E. Propionibacterium sharmanii – Used in the production of Swiss cheese. Though often used in industrial production,
it is still relevant to food products that can be produced in households.
❌ Involved in household products.
Conclusion: The microbes that are not involved in household product preparation are:
- A. Aspergillus niger
- C. Trichoderma polysporum
Correct Answer: (2) A and C only