Specialisation and Organisation

Question 1

suggest 3 regions of a gene

Answer 1

promoter: Located upstream of the RNA coding sequence. Ensures proper location of initiation and ensures correct positioning of RNA polymerase

RNA coding sequence: The DNA sequence that is transcribed into RNA

Terminator: a sequence downstream of the RNA coding region which specifies where transcription will stop

Question 2

Outline the Transcription process

Answer 2

Initiation:
Location of the promoter region by transcription initiation complexes

Elongation:
RNA Polymerase catalyses the synthesis of RNA in the 5’ to 3’ direction

Chain termination & release of RNA:
The end of the gene is marked by a terminator sequence. The RNA polymerase ceases activity and the nascent RNA is released