Laurea: Biologia della Cellula e dei Tessuti (corso A) - modulo cellula08_bct_03_11_10
From DNA to RNA: The process of copying DNA into messenger RNA (mRNA) is called transcription. Transcription factors assemble at the promoter region of a gene, bringing an RNA polymerase enzyme to form the transcription initiation complex. Activator proteins at the enhancer region of DNA then activate the transcription initiation complex. RNA polymerase unzips a small portion of the DNA and copies one strand into an mRNA molecule. | |
RNA splicing: RNA splicing is a process that removes introns and joins exons in a primary transcript. An intron usually contains a clear signal for splicing.This process is catalyzed by proteins and small nuclear RNAs (snRNAs) that are associated to form the spliceosome. |