Question

1.Write any one use of yeast in food processing? 2. Name a microorganism which helps in nitrogen fixation 3. Which bacteria is used to prepare curd from milk

Answer 1

Answer:

1) it helps to make the food to make spongy and fluffy and aad a taste of little sour in it.

2) the microorganism is rhizobium.

3) to make the curd the lactobacillus bacteria is used.

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Answer 2

Answer:

1. yeast have two main uses in food production: baking and making alcoholic beverages. they have been used in this ways since ancient times - there is evidence that ancient Egyptians used yeast in breadmaking, and we have been making fermented drinks like beer and wine for millennia.

2. free - living nitrogen - fixers include the cyanobacteria anabaena and nostoc and genera such as azotobacter, beijerinckia, and clostridium.

3. when milk is heated to a temperature of 30- 40 degrees centigrade and a small amount of old curd added to it, the lactobacillus in that curd sample gets activated and multiples. these convert the lactose into lactic acid, which imparts the sour taste to curd.