Answer:
Proteins don't make proteins directly, although they are an integral part of the process. Some proteins are enzymes -- biological catalysts -- which help in all aspects of protein synthesis. For example, RNA polymerase (an enzyme) transcribes DNA to RNA so it can be sequenced into a polypeptide. Ribosomes (protein-rRNA complexes) also help build the strands. However, enzymes cannot do it all; nucleic acids are needed to code for the sequence of amino acids.