It's this entire structure that contains the DNA, as well as the proteins that hold that dense structure together. So the chromosomes are basically the DNA, along with the proteins that are found within the nucleus of our cells and the cells of other organisms. Now, what's the special feature? What's the special thing about DNA? Well, DNA basically contains the code that the cells use to create proteins. And proteins are important in forming different organelles within the cell, as well as helping the cell carry out different types of cellular processes.