Ok, so it's a complicated image. The first thing I thought is it looks like the schema of a simple arithmetic operation in a processor. Meaning that it looks complicated, but it doesn't tell us anything. I see dots and lines and pretty colors, but I don't see an argument.
That's because the vast majority of the detail has been omitted in order to make it look pretty. Here is a slightly more detailed version: http://primalmeded.files.wordpress.com/2011/05/metabolism.jp...
And another: http://3.bp.blogspot.com/-MJisxWVfZPA/UEF_-1krN-I/AAAAAAAAr9...
For more info, read Principles of Biochemistry: http://www.amazon.com/Lehninger-Principles-Biochemistry-Davi... (and if you aren't familiar with organic chemistry: http://www.amazon.com/Organic-Chemistry-1st-Edition-ebook/dp...)