How does the cell know when to produce a protein? Why does it produce this protein? How does it produce this protein so accurately, in transcription, timing, and concentration? It is amazing that the cell functions as precisely as it needs to in response to various stimuli. What is more amazing is that the cell's actions are a result of stochastic processes.

While studying (very diligently) for my upcoming midterm, I discovered a wonderful Wiki that provides problems and solutions for many collegiate math courses.