Which of the following bacteria grow in milk and convert it to curd?

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SSC Selection Post 2024 (Higher Secondary Level) Official Paper (Held On: 20 Jun, 2024 Shift 2)
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  1. E. curdae
  2. Salmonella typhi
  3. Lactobacilus
  4. Salmonella lactae

Answer (Detailed Solution Below)

Option 3 : Lactobacilus
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Detailed Solution

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The correct answer is Lactobacilus.

Key Points

  • Lactobacilus are responsible for the fermentation process that converts milk into curd.
  • These bacteria produce lactic acid as a byproduct of lactose fermentation, which lowers the pH of milk, causing it to coagulate and form curd.
  • Common types of lactic acid bacteria involved in this process include Lactobacillus bulgaricus and Streptococcus thermophilus.
  • The production of curd is a traditional method of preserving milk and enhancing its nutritional value.

Additional Information

  • Curd is a rich source of probiotics, which are beneficial bacteria that aid in digestion and improve gut health.
  • It also contains essential nutrients like calcium, protein, and vitamins, making it a valuable addition to the diet.
  • In many cultures, curd is used in a variety of dishes and is a staple in traditional cuisine.
  • The fermentation process not only enhances the flavor of milk but also extends its shelf life.
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