Question

write an experiment showing presence of bacteria in milk into curd ​

Answer 1

Write an experiment showing presence of bacteria in milk into curd.

Answer:

Yoghurt bacteria

Materials needed:-

• Glass microscope slides
• Plastic cover slips
• Yogurt with live culture
• Toothpicks
• Paper towels or tissues
• Methylene blue solution (0.5 to 1%) Optional

Methods:-

Step1- Take a very small drop of yogurt with the toothpick and smear it for 2 to 3 seconds on the slide.

Step2- Place a small drop of methylene blue solution on a microscope slide (optional). Wear gloves and do NOT allow children to handle methylene blue solution.

Step3- Place a coverslip on top. Remove excess solution around the coverslip with a paper towel or tissue.

Step4- View in the compound microscope at 4 x or 10 x initially, before moving to higher magnification. Bacteria will appear small even at the highest magnification.