In biotechnological studies,the alga that is exploited as a rich source of protein is

Methylophilus methylotrophus is which type of organism?

Which microorganism produces $200$ grams of protein in a single day?

What is primarily obtained from mushrooms as a food source?

The bacterium $Methylophilus$ $methylotrophus$,due to its high rate of biomass production and growth,is capable of producing $25$ tonnes of protein.

$(A)$ The shift from grain to meat diets creates more demands for cereals. Why?
$(B)$ $A$ $250 \ kg$ cow produces $200 \ g$ of protein per day, but $250 \ g$ of $Methylophilus \ methylotrophus$ can produce $25 \ \text{tonnes}$ of protein. Name this emerging area of research. Explain its benefits.