Question

Hello there, in my biology class, we did a bacteria milk lab and my group added yeast to the milk in a test tube for three different amounts and left them in the dark, checking on the test tubes every day for 3-4 days. My question is that what does yeast do when it goes into milk and what changes/how does everything change from day to day? Just wondering how yeast affects the experiment, thanks.

Answer 1

The standard plate count is used to determine the total number of bacteria present in a specified amount of milk, usually a milliliter (mL). This is used for the grading of milk. The coliform plate count is widely used to determine the total number of coliforms present in one mL of milk sample.