Describe the method of preparation of slide to observe bacteria in curd in your school laboratory
Answers
Answer:
Methods
1)Take a very small drop of yogurt with the toothpick and smear it for 2 to 3 seconds on the slide.
2)Place a small drop of methylene blue solution on a microscope slide (optional). ...
3)Place a coverslip on top. ...
4)View in the compound microscope at 4 x or 10 x initially, before moving to higher magnification.
Hence the process of making curd from milk using lactic acid bacteria is called curdling, while yogurt is formed by fermentation of lactobacillus bacteria.
The two types of bacteria observed are: Lactobacillus bulgaricus (rod shaped)
Which are the Lactobacilli species present in curd and yoghurt? Curd may contain a wide variety of bacteria like Lactobacillus acidophilus, Lactococcus lactis, Lactococcus lactis cremoris etc, whereas yoghurt contains Streptococcus thermophillus and Lactobacillus bulgaricus.