Which type of rotor is best to use if you wish to separate a sample into a pellet and supernatant?

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?

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

The Belmont Report requires “justice” and a “fairness in distribution”. This refers to

How do you prepare 400 ml of 70 mM Tris (Mw = 121.14)?

What would you expect absorbance of a sample to be if it had a transmittance of 26%?

You have a stock of DNA ligase at 100,000 units/µl. You need 5,000 units of ligase in a 10 µl reaction, how many microliters of ligase do you need?

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

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

What would the transmittance of a sample be if the absorbance was 0.7?