4.3 Flashcards
Transcription process
initiation, promoter, clearance, elongation, and termination
Initiation
When the Enzyme RNA binds to a region of gene called a promoter. This signals the DNA to unwind so the enzyme can read the bases in one of the DNA strands. The enzyme is now ready to make a strand of mRNA with a complementary sequence of bases
promoter
A region of DNA the initiates transcription of a particular gene
clearance
the rate at with a drug or substance is removed from the plasma and divided by the concentration of that drug or substance in that plasma
termination
the end of transcription where a RNA polymer crosses a stop termination sequence in the gene. the mRNA strand is complete and it detaches from the DNA
Adds poly a tail to the 3 end of the new RNA molecule
Poly A polymerase
Splices introns out of pre-RNA molecule
Splicasome
Matches complementary RNA nucleotide to template DNA strand
RNA Polymerase
binds promoter to initiate transcription
General transcription factors
Order
1 General transcription with TATA
2 RNA Polymers binds to promoter
3 DNA unwound And RNA makes complementary nucleotide
4 5´ capping
5 RNA splicing
6 RNA polymers transcribes a 7 polyadenylation signal sequence
a tail on 3