Question

which compounds are formed due to lactobacilli that give characteristic test to the yoghurt ​

Answer 1

Answer:

lactobacillus is present in milk.

due to increase in the proportion of lactobacilli the acidity of the milk increases.

this is the reason for conversion of milk into yoghurt or any other different products.

Answer 2

Curd is formed due to addition of lactobacilli in milk.

Explanation:

Curd or dahi is formed by the addition of the bacteria lactobacillus in the substrate called milk.

Milk contains the globular proteins known as casein. The curd is formed due to the chemical reaction between the lactobacillus bacteria and milk protein casein.

The bacteria uses lactose to make ATP and the by-product produced is lactic acid. This acid denature the globular protein in milk and this denaturation converts the Quaternary structure of protein into fibrous structure. The coagulation of protein forms curd.

Learn more about curd formation:

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