A protein has an absorbance of 0.82, and 2 tryptophans (ε = 5500) and 5 tyrosines (ε = 1490). What is its concentration?

Which organization requires laboratories to provide a Safety Data Sheet for all chemicals?

You are making a 1 M Tris pH 8.0 buffer, and you dissolve the correct amount of Tris into water and pH it with HCl. If you pH it to 7.9 you should

The Principal Investigator of the laboratory is usually the ________ on a paper.

Which type of rotor allows you to run gradients and separate samples into tight bands for further analysis?

A document that contains all of the hazardous information about a chemical is the

Which of the following is equal to 150 ng/µl?

How do you prepare 1 L of 60 mM Tris pH 8 (Mw = 121.14), 700 mM NaCl (Mw = 58.44) from a 1 M stock of Tris pH 8? 

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 dependent variable?

What would you expect the transmittance of a sample to be if the absorbance was 0.63?