Question

Statement 1: Besides curdling of milk, LAB also improve its nutritional quality by increasing vitamin B12-
Statement 2: Lab, when present in the human stomach, checks disease causing microbes.
A. Both statement 1 and 2 are correct
B. Statement 1 is correct but statement 2 is incorrect
C. Statement 1 is incorrect but statement 2 is correct
D. Both statement 1 and 2 are incorrect

Answer 1

Hint:- The starter of inoculums used in preparation of milk products containing millions of Lactic acid bacteria (LAB) like Lactobacillus are added to skimmed or cream milk at a temperature of about 40⁰C or less. They convert lactose sugar of milk into lactic acid. Lactic acid causes coagulation of milk protein casein. Milk is changed into curd. Besides the conversion of milk into lactic acid, the LAB also improves quality by increasing vitamin B12. Curd is more nutritious than milk as it contains several vitamins and organic acids. LAB present in curd also checks the expansion of disease-causing microbes in the stomach and other parts of the alimentary canal. Indian curd is used either as such or in other forms such as mattha, chhach or lassi.

Complete answer:
Microorganisms such as Lactobacillus and others commonly called Lactic Acid Bacteria (LAB) grow milk and convert into curd. During growth, the LAB produces acids that coagulate and partially digest the milk proteins. A small amount of curd added to the fresh milk as inoculums or starter contain many LAB, which also improves its nutritional quality by increasing B 12 note in our stomach, the lab play other options aren't related with LAB bacteria beneficial role in checking disease causing microbes.
So, the right option is that the option Both statement 1 and a couple of are correct.

Note:- Lab improves its nutritional quality by increasing vitamin B12 besides curdling the milk. Labs produce myriad beneficial effects for citizens including, alleviation of lactase deficiency, diarrhea, and peptic ulceration, stimulation of the system, antiallergic effects, antifungal actions and prevention of carcinoma.