Chemistry of Life, The Journey of a Carbon Atom

Having gotten to the edge of the nuclear membrane you're worried that Phosphorus won't be able to squeeze through the pores being that his atomic number is 15 but luckily, or unluckily he's able to get through... ugh

As you're entering you see a bunch of RNA floating around and you see this big jumble of chromatin made from a single DNA strand, in an effort to blend in you form a 5-carbon, phosphate group, and a nitrogenous base. You saw many different types of nitrogenous base so you decided to choose one and go with it.