Final answer:
DNA contains the instructions to assemble amino acids in a specific order to make protein. The central dogma of molecular biology states that DNA contains instructions for making a protein, which are copied by RNA. Proteins are responsible for orchestrating nearly every cell function.
Step-by-step explanation:
DNA contains the instructions to assemble amino acids in a specific order to make protein. Each cell type only "turns on" (or expresses) the genes that have the code for the proteins it needs to use. Gene expression and protein synthesis are usually considered the same molecular process.
The central dogma of molecular biology states that DNA contains instructions for making a protein, which are copied by RNA. RNA then uses the instructions to make a protein. In short: DNA RNA Protein, or DNA to RNA to Protein.
Proteins are responsible for orchestrating nearly every cell function. Therefore, proteins also influence most of the traits displayed by multicellular organisms. DNA contained in cells is a blueprint for making proteins. Each chromosome is a single molecule of DNA wound tightly around proteins. Segments of the DNA molecule, called genes, code for the order of amino acids in each protein. Both genes and the proteins they encode are absolutely essential to life as we know it.