What is the purpose of adding mineral oil to an O/F Media tube and why do we only put mineral oil in only one?

Why is it necessary to inoculate the KIA medium all the way down to the bottom of the tube during inoculation?

What is the structural and functional differences between Inoculating loop versus inoculating needle?

What chemical ingredients make MSA differential? How (in your own words) do those chemical ingredients work to make this medium differential?

Draw what is happening in a microtiter plate well when the patient's sample contains TSH. Provide a key to your drawing.

A mistake was made in preparing the arginine decarboxylase test, and mineral oil was NOT added to the test tube after inoculating with bacteria. If an arginine decarboxylase-positive bacteria species was inoculated into the above arginine-decarboxylase broth without mineral oil, what would likely be the color result of this bacteria in this test? Would this produce a false positive or false negative result? Explain.

If after adding sulfanilic acid and naphthylamine to your nitrate broth cultures, your tube tube turns red. This means... the bacteria did not use nitrate (NO3). O the bacteria reduced nitrate to nitrite (NO₂). O you need to add zinc dust as the next step. the bacteria converted nitrate to ammonia (NH3).

After placing sample in this instrument, what are the names of two fractions in the tube (choose all that are correct)? OPellet O Base O Supernatant O Fluid O Precipitation

To identify a positive control in your lab report, should you list any test tube with positive results? Why or why not? What is a negative control? Which substance is a negative control for each of the tests in this lab exercise?