Question

Purpose of milk pasteurization-
A. Strip’s bacteria of oxygen
B. Make the milk tasty for drinking
C. Destroy microbes
D. All of the above

Answer 1

Hint: When milk changes into curd this process is termed as a microbic reaction. As, the microbe Lactococcus lactis is used in changing the milk into curd. A small ample amount of curd which is nothing but the microbe can turn the milk into semi-solid form. Milk pasteurization is making the milk microbe free so that it can be safe for drinking purposes.

Complete answer:
Option A: Strip’s bacteria of oxygen- strip’s bacteria off as milk is pasteurized for only one reason to keep bacteria off bacteria which delivers from the contamination.
Option A is not the correct answer.
Option B: Make the milk tasty for drinking- if the microbes residing in the milk are dead or off from milk definitely the milk changes its taste.
Option B is not the correct answer.
Option C: Destroy microbes- pasteurization is the process where microbes from milk are killed by using various methods. So, destroying microbes will make the milk more nutritious and healthier for human drinking.
Option C is not the correct answer.
Option D: All of the above- this option is true as all the above options are correct to the statement. It satisfies all the options.
Option D is the correct answer.

Hence, Option D is the correct answer.

Note:
When milk turns into curd it changes in taste not in color. As, the color remains pale tallow to white which is usually the color of milk also. So not much difference is observed. milk changes into a semi-solid form on reacting with microbes and the process is irreversible. Milk is rich in casein protein while curd is rich in antibiotics. Milk pasteurization is essential for drinking.