Author: Anonymous

You wish to study the effects of of a drug’s concentration on bacterial growth. For this experiment, you alter the drug’s concentration and measure the change in bacterial growth, while making sure the temperature is constant in each sample. Which is the control?

When using a micropipette, you must push down to the first stop to

A group of graduate students gather every week to present papers from the latest editions of Nature. This is called a(n)

An experiment calls for 375 ml of 55% w/v solution of NaCl (Mw = 58.44). How many grams of NaCl are needed?

What is the extinction coefficient of a protein with a concentration of 1.25 μM and absorbance of 0.65?

You measure a solution containing actin (ε = 42,680 M-1 cm-1) in the spectrophotometer. The absorbance is 0.25. What is the concentration of actin?

80 ng of DNA is needed for a ligation, and its concentration is 30 ng/µl. How many microliters of DNA are required?

Polycarbonate bottles are clear, and therefore the sample can be visualized after centrifugation. What advantage do polypropylene (opaque) bottles provide?

A 50 kDa protein would consist of approximately ______ amino acids.

What is the extinction coefficient of a protein with a concentration of 1.25 μM and absorbance of 0.45?