The cellular process is protein synthesis. <span>After a strand of DNA is transcribed into RNA, it is sent to the ribosomes to undergo translation, where it reads the code on RNA and makes a corresponding amino acid based on the RNAs base pairs. A chain of amino acids will make up a protein.</span>
A scientist will test it and support it with things so the scientist knows its true and that should be a theory no longer a hypothesis if they proved the information.
During transcription and translation, for the same information to be coded in a given cell during replication, it is in order that dna have the same pairs.