The formation of protein or protein synthesis begins in DNA. The process of replication helps to make multiple copies of DNA. A single strand of DNA is copied to form mRNA and the process is called transcription. Now, during translation, all kinds of non-genetic RNAs- rRNA, tRNA and mRNA form proteins. This is called the Central dogma theory developed by biologist ‘Francis Harry Compton’ in which he states that biological knowledge flows in a single pattern.

DNA → RNA → Proteins