Transcription

Transcription: Transcription is the first step in gene expression. Transcription is when you copy a gene's DNA sequence to make a RNA strand. It is made by enzymes called RNA polymerases. There is 3 different stages in Transcription, initiation, elongation, and termination. 

https://limbiclab.files.wordpress.com/2012/12/limbic_lab_dna_transcription_diagram1.png


The goal of transcription in to make an mRNA and get the sequence to the ribosome so they can make proteins. 

RNA polymerase is the enzyme used in transcription that uses a single strand DNA strand to make a copied strand of RNA. RNA polymerase is what orders the RNA in 5' to 3' by always adding a nucleotide to the 3' side. 


3 Stages of Transcription: 

Initiation: RNA polymerase connects to the DNA strand breaking it apart. 

Elongation: The RNA polymerase reads the DNA making the 5' to 3' strand of RNA. 

Termination: Terminators signal that the process is done and it i released from the RNA polymerase.

What I learned: 
I learned that a enzyme named RNA polymerase does the coding on the mRNA and it is the thing that sequences the mRNA. I learned that there are 3 different stages in transcription. I learned that transcription is a very complicated process that takes a lot of explain.

Citations: 
"Khan Academy". Khan Academy. N.p., 2017. Web. 19 May 2017.