"DNA is made of amino acids. If the DNA can't get into a cell, it's useless as DNA and is only good for digestion into amino acid building blocks for some other protein."
No, just totally, absolutely 100% wrong. If you voted this comment up, please smack yourself for voting up things that merely sound authoritative. Thank you.
Proteins are made of amino acids. DNA is made of deoxyribonucleotides. They're nothing alike. Proteins are translated from the information in RNA, which is a minor variation of the information in DNA. Think of proteins as molecular machines that are made from the instructions in DNA, and you're closer to the truth.