Question

I did the litmus milk test for my microbiology lab. My results came back as a no color change in the litmus milk sample, but when my sample was tilted it did shift. What are my results from this experiment? my sample is sample d. I'm trying to write a lab report, but I don't know what to write. I can't redo this experiment.

b d.

Answer 1

✓Litmus milk test is a test to differentiate bacteria on the basis of their metabolism.

✓Milk is just like a medium for the various microbes.

What contents does litmus milk have ?

* Lactose(milk sugar for bacteria that is for fermentation.)

*Litmus (pH indicators)

* Casein and other proteins lactoglobin

Now various bacteria in each sample do fermentation and produce acid condition and as a consequence, casein and other milk proteins they get solidified.

:-->> What to write:--

As we know that, on performing this result here, we are about to get some observations like given above :--

1. Pink colour means lactose has been fermented by bacteria and it's acidic so litmus will show pinkish colour. And casein is solidified at bottom.

2. Bluish means basic and lactose has not been fermented.

3. White means litmus has been reduced and became clear.

4. Yellow brownish colour indicates about being broken down of protein Casein.