Which microorganism is used in the production of bread?

How are microbes useful in household products?

The puffed-up appearance of dough is due to fermentation by bacteria. Identify the gas liberated during the process.

The microorganism that converts milk into curd is ..........

How many of the following statements are correct regarding the process of converting milk into curd?
$I -$ The bacteria responsible for this process are $LAB$.
$II -$ $LAB$ produces acids that coagulate the milk.
$III -$ The protein present in milk is partially digested.
$IV -$ It increases the nutritional quality by increasing the amount of Vitamin $B_{12}$.

Lactic Acid Bacteria $(LAB)$ grow in milk and convert it into curd,and also improve its nutritional quality by increasing the content of ...........