dna transcription Flashcards
ssRNA
RNA is single stranded
differences between RNA and DNa
RNA is more than info storage
there are many types of rna
rna is single stranded
transcription
dna is used as a template to make a complementary RNA
RNA polymerase
adds nt to the 3’ end
adds nt 5’ to 3’
v similar to replication what are differences
fewer players
RNA transcript does not stay hydrogen bonded to template DNa
transcribe single genes
how is transcription initiated
by signals within the dna.. Promoter and Terminator sequences
what type of RNa goes on to be translated into protein
mRNA/ messenger RNA
mRNA
messenger rna is the rna that goes on to be protein
poly-A tail
helps stabilize RNA molecule
important in transporting mRNA across the nuclear envelope
intron
a segment of a DNA or RNA molecule which does not code for proteins and interrupts the sequence of genes.
exon
any part of a gene that will encode a part of the final mature RNA produced by that gene after introns have been removed by RNA splicing
RNA splicing
removes introns, keeps and connects exons
performed by spliceosome
Spliceosome
The spliceosome removes introns from a transcribed pre-mRNA, a type of primary transcript
is made up of snRNA and proteins
where does central dogma take place in prokaryotes
Crytosol: replication, stranscription, translation
where does central dogma take place in eukaryotes
nucleus: replication, transcription
cytosol: translation
mRNA is transported across the nuclear envelope
