RRB Paramedical Staff Nurse Model Paper 4

Transcription takes place in three major steps initiation, elongation and termination. Initiation involves binding of RNA polymerase to the TATA box. This is followed by addition or polymerisation of ribonucleotides according to the template. The last step is termination, during which RNA polymerase detaches from the parental DNA in order to end the transcription process. The newly formed mRNA then undergoes processing, which involves capping and tailing by protective molecules