Question

Ramu took a glass of milk and poured two teaspoonful of buttermilk in it at night. In the morning he obtained curd. Which of the following has helped in changing milk into curd?
A) Protozoa B) Fungi C) Bacteria D) Viruses

Answer 1

c) bacteria is added

Answer 2

(C) Bacteria has helped in changing milk into curd.

Mechanism of conversion:

The bacteria, named Lactobacillus is responsible for changing of milk into curd by converting lactose into lactic acid. This lowers the pH of the milk.

• Protozoa: It is a category of organisms under Kingdom Protista. There are various types of protozoans like ameboid, flagellated, etc.  Example - Amoeba, Trypanosoma, Plasmodium, etc.
• Fungi: It is a category of unicellular or multicellular organisms with chitinous cell wall and saprophytic nutrition. Example - Agaricus, Rhizopus, etc.
• Bacteria- It is a category of organisms under Kingdom Monera. Prokaryotic organisms that are found almost everywhere. There are different classes of bacteria. Example - Mycoplasma, Salmonella typhi, etc.
• Viruses: Small crystals of genetic material that are living only inside the host organisms. Example - Coronavirus, HIV, etc.