1) You are having a 2.5 mg/ml solution of an amino acid ( mol.wt. = 100). You are need to add the 0.5 µmoles into a test tube. Specify the amount you would pipette?

2) You require a 10mM solution of the potent (and dangerous) transcription inhibitor (mol.wt.500) to do an experiment. To prevent the handling of powder form of this compound you choose to make up the whole bottle instead of attempting to weigh out the portion. The compound is available in the 200 mg batches. Specify the volume you would add to one of these bottles in order to make up a 10 mM solution?