Cheese is prepared from

Study the following flow chart that shows curd formation from milk and select the correct option for $A$ and $B$.
Milk is incubated with curd
$\downarrow$
$LAB$ shows growth in milk
$\downarrow$
Production of .....$A$.....
$\downarrow$
Coagulation and digestion of milk protein
$\downarrow$
Improved nutritional quality by increased ....$B$....

The large holes in Swiss cheese are due to the production of a large amount of $a$ by a bacterium $b$. Here $a$ and $b$ refer to:

Which one of the following is used in the baking of bread?

Choose the correct sentences.
$(i)$ Dosa and Idli are fermented by bacteria, not yeast.
$(ii)$ $Saccharomyces \text{ } cerevisiae$ is a yeast.
$(iii)$ $LAB$ (Lactic Acid Bacteria) increase the nutritional quality of milk by increasing vitamin $B_{12}$.
$(iv)$ Whisky and brandy are fermented beverages produced by distillation.

Which of the following are the main benefits of $LAB$?
$I.$ Increase vitamin-$B_{12}$ amount,thus increasing nutrient quality of milk.
$II.$ Checks disease-causing microbes in the stomach.
Choose the correct option.