Beginning with AUG (start codon) and ending with a stop codon (UAA), a stretch of a mRNA molecule consists of 63 bases (base 1 is the “A” in the AUG, and base 63 is the “A” in the UAA).  How many amino acids will the peptide encoded by this messenger RNA contain?

The DSM-V does not define addiction as such, but has diagnostic criteria for 

Physical dependence is often defined by the occurrence of withdrawal syndrome when the drug is stopped.

In an annual study done by the U.S. Justice Department, people arrested for various crimes are given urine tests to detect the presence of drugs. In 2013, about ____ percent of the adult male arrestees tested positive for at least one illicit drug.  

Which of the following drugs has been clearly linked to crimes and violence?

What is the mole fraction of oxygen in a gas mixture that is 40.0% oxygen and 60.0% nitrogen by volume?

A solution is prepared by dissolving 17.75 g sulfuric acid, H2SO4, in enough water to make exactly 100.0 mL of solution. If the density of the solution is 1.1094 g/mL, what is the weight % H2SO4 in the solution?

How much water must be added to 42.0 g of CaCl2 to produce a solution that is 40.0 wt% CaCl2?

For a liquid solution made by dissolving a solid or a gas in a liquid, the

What volume of 3.00 M CH3OH solution is needed to provide 0.500 mol of CH3OH?