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You need to centrifuge a 1 ml sample at 7000 g, separate soluble and insoluble components, and visualize the pellet inside the tube afterwards. Which of the following should you use?  

Mycobacterium tuberculosis is a potentially lethal organism that has an inhalation route of entry. Current treatment involves taking several antibiotics together.  A lab that studies this organism would be assigned a rating of

Steps of protocols are allowed to be omitted from a journal if

You wish to include a picture of a gel in a paper. Which of the following is NOT acceptable?

Absorbance and concentration are ________ related, while absorbance and transmittance are ________ related.

To harvest bacteria or yeast in large volumes (e.g. 50 liters) you should use a(n)

Using the standard curve below, what is the concentration of a sample that gives an absorbance of 0.3 when 6 microliters of sample are assayed?

Buffers lose their capacity to resist changes in pH when

The absorbance of a solution is directly proportional to

You analyze a DNA sample which gives an A260 of 1.87 and an A280 of 1.15. What is the concentration of this DNA sample, and is it sufficiently pure?