Question

To reduce the percentage of population suffering from hunger and malnutrition, microbes are grown on a large scale to act as food supplements. Mention any two microbes used as food supplement and suggest their role?
class 12th CBSE Biology sample paper

Answer 1

This process is called Single Cell Protein or SCP. 
Algae, Fungi and Bacteria are commonly used.
Algae- Spirullina maxima.
Fungi- Candida utilis
Bacteria- Brevibacterium ketoglutamicum
Spirullina can be grown easily on waste water from potato processing plants, straw, molasses, animal manure and even sewage to produce large quantities and can serve as food which is rich in proteins, minerals, fats, carbohydrates and vitamins.
Hope this is helpful for you