The central dogma of molecular biology describes the flow of genetic information within a biological system. It consists of three main processes: replication, transcription, and translation.
Replication is the process by which a cell makes an identical copy of its DNA. This occurs during the cell cycle and is essential for the transmission of genetic information to daughter cells.
Transcription is the process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA). This process takes place in the cell's nucleus and is carried out by an enzyme called RNA polymerase.
Translation is the process by which the information in mRNA is used to build a protein. This occurs in the cell's cytoplasm and involves the interaction of mRNA with ribosomes, transfer RNA (tRNA), and amino acids.
Each of these processes is essential for the proper functioning of a cell and the transmission of genetic information from one generation to the next.