Are proteins a window to DNA?
FIrst of all DNA is not a mixture of nucleic acids and proteins,  but protein does hold DNA together, and certain proteins (histones) that hold DNA together need to be activated in order to open up essentially in order to allow for transcribtion of DNA into messanger RNA.  However, if you reverse a protein to DNA you find where it correlates to on the DNA strand and the nucelotide sequence, thus this may be a possible reasoning to the question. For the most part i would not say proteins are a window to DNA but instead a key to understanding it.
im studying the digestive system right now, so i'll have a go at this question (u may want to chec accuracy).\nthe cell gets the carbon it needs via the blood supply. when we eat, all the nutrients are broken down and molecules such as hydrogen, oxygen and carbon are filtered into the blood stream so that they can be passed on to all the cells in th body.\n\ndoes that help?