Replication vs Transcription
Replication is a biological process that carries on inside all living organisms and refers to copying of DNA which is the basis of all life forms. Cells, when they divide, undergo DNA replication first. The process is initiated at points inside DNA known as origins. DNA molecule is a double helix and both strands are copied in an identical manner. The sequencing pattern of the DNA molecule is contained in these origins. There are initiator proteins that recruit other proteins also to start the process of replication. There is another process that takes place inside living organisms known as transcription. This is creation of a complimentary copy of DNA called RNA. There are many similarities in the two processes of replication and transcription but there are many differences also that many people remain confused about. These differences will be highlighted in this article.
The instruction manual, so to say, that contains entire information about DNA remains inside the nucleus contained in a double layer of membrane. All the DNA copies itself when the cell is to divide, and the process initiates even before cell division. This is the process known as replication. After the process is complete, both the new cells contain exactly the same DNA material as the parent cell.
All living organisms also need to make proteins to sustain themselves. Cell which is the basic unit of life gets signals as to which page of the DNA to use for the purpose. Once this area is identified on the DNA, the top strand of DNA behaves like a messenger (mRNA).
The process of transcription has the same objective of making an identical copy of the DNA. The difference lies in the fact that whereas in replication, the double strand structure is formed; transcription involves formation of one strand than the the other. Thus in transcription, a complimentary RNA copy of a sequence of DNA is created. Both DNA and RNA are nucleic acids made up of nucleotides and can be converted into one another. A strand of RNA results from the process of transcription which is unlike replication where DNA gets replicated.
Difference Between Replication and Transcription
• Transcription is the process of building RNA copy of a DNA sequence. On the other hand, replication is a process used to copy chromosomes inside a nucleus of a cell when it is ready to divide
• Transcription occurs after replication