1. Aim: To observe lactobacilli bacteria in curd or buttermilk under a compound microscope.
2. Requirements: a clean glass slide, a drop of curd or buttermilk, water, a cover slip, and a compound microscope.
3. Procedure
- Take a clean glass slide and place a small drop of curd or buttermilk on it.
- Add a tiny amount of water to dilute the drop.
- Carefully place a cover slip over the drop to avoid air bubbles.
- Use a compound microscope to observe the sample under high power.
4. Observation: Small, moving, rod-shaped microbes, known as lactobacilli bacteria, can be observed.
5. Conclusion: The experiment shows that curd or buttermilk contains lactobacilli bacteria, which are part of the Kingdom Monera. This kingdom includes all types of bacteria and bluegreen algae.