The second picture is an idealized representation of a chunk of DNA designed to highlight the specific purine-pyrimidine base-pairing of adenine with thymine and guanine with cytosine inherent between the double-stranded structures in our DNA. I have a quiz on this stuff tomorrow morning (well, both DNA and RT-PCR - Reverse Transcriptase Polymerase Chain Reaction), and I couldn't help but express some of my awe at the complexity of what goes into the smallest parts of our organic beings. To me, this level of blatant design shouts that there is a designer, which I believe to be God. This is the reason I studied a science (Physics) in the first place - to closely examine the order and design present in every niche of the world around and within us. This is the stuff that makes me wish I could study every science course in existence (minus statistics, which is more of a necessary evil than a science). This excitement is why I don't worry too much about the hard-science aspect of medical school... I worry a bit, but not too much; it's definitely not easy, but I like it.
Anyway, hopefully enough of my enthusiasm came through that you weren't bored, even if biomolecules and science aren't exactly your cups of tea. For those of you that feel the same way as I do - ISN'T THIS STUFF AWESOME?!?!!