Why is 'starter' added to set the milk into curd ? Explain.

Name the group of bacteria involved in setting milk into curd. Explain the process they carry in doing so. Write another beneficial role of such bacteria.

Bacteria which converts milk into curd is

Which enzyme converts milk into curd?

Study the following statements regarding lactic acid bacteria (LAB) which are used to convert milk into curd. (i) They produce acids that coagulate and partially digest the milk proteins. (ii) A small amount of curd added to the fresh milk as an inoculum contains millions of LAB , which at suitable temperature, multiply and convert milk into curd. (iii) Conversion of milk into curd improves its nutritional quality by increasing vitamin B_(12) . (v) LAB may result in acidity in the stomach of human beings. Which of the given statements are correct ?

Mention the importance of Lactic acid bacteria to humans other than setting milk into curd.