Question

how does the milk change into curd

Answer 1

when lactobacillus bacteria increased in milk and virus of curd sample added to milk it changed into curd

Answer 2

Milk is converted into curd or yogurt by the process of fermentation. Milkconsists of globular proteins called casein. The curd forms because of the chemical reaction between the lactic acid bacteria and casein. During fermentation, the bacteria use enzymes to produce energy (ATP) from lactose.