Biology Microbes in Human Welfare part 2 (Curdling of milk) class 12 XII

TL;DR

Microbes, specifically lactobacillus, play an important role in the curdling of milk, fermentation in baking, and the formation of cheese, and they have beneficial effects on digestion.

Transcript

hello friends this video on microbes and human welfare part 2 is brought to you by exam feel calm no more fear from exam so now let us talk about the first topic that is microbes and household products now as I had mentioned in household products that are white a few products where microbes play a very important role in their preparation so one of ... Read More

Key Insights

• 🖐️ Microbes, such as lactobacillus, play crucial roles in the preparation of various household products.
• 🧑‍⚕️ Lactobacillus is a beneficial bacterium that helps with digestion and has health-promoting effects.
• 🥺 Curdling of milk involves the conversion of lactose into lactic acid by lactobacillus, leading to protein coagulation and the formation of curd.

Questions & Answers

Q: What role do microbes play in the curdling of milk?

Microbes, specifically lactobacillus, are responsible for curdling milk. Lactobacillus converts lactose, the sugar present in milk, into lactic acid through fermentation, which leads to coagulation of milk proteins and the formation of curd.

Q: Is lactobacillus harmful if it enters our body through consuming curd?

No, lactobacillus is a friendly bacterium and does not cause harm when ingested through curd consumption. In fact, it helps treat and prevent diarrhea, aids in food breakdown, and facilitates nutrient absorption in the digestive system.

Q: How does the texture and taste of milk change during curdling?

During curdling, the increased acidity from the formation of lactic acid causes the milk proteins (season) to coagulate and bind together, forming solid masses. This change in protein structure gives curd its characteristic texture and sour taste.

Q: What factors affect the process of curdling milk?

The process of curdling milk is dependent on suitable temperature and pH conditions for the growth and multiplication of lactobacillus. Extremely cold or hot temperatures can hinder the curdling process.

Summary & Key Takeaways

• Microbes, such as lactobacillus, are crucial in the preparation of various household products, including curd, bread, cakes, and cheese.

• Lactobacillus is a friendly bacterium that helps in treating and preventing diarrhea, aids in food breakdown, and facilitates nutrient absorption.

• Curdling of milk involves adding a small amount of curd, containing lactobacillus, to the milk, which converts lactose into lactic acid and coagulates the milk proteins, resulting in the formation of curd.