transcription Flashcards
why is DNA in a double helix shape
to protect from radiation
what does authophagy do
fuse cell to cell membrane
what adds more membrane to cell
exocytosis
first step of transcription
make a template for the production of mRNA which carries information needed for protein synthesis which can pass out of the nucleus
what are the enzymes linked with ribosomes
DNA - helicase
RNA - polymerase
in what nucleotide is helicase?
DNA
in what nucleotide is polymerase ?
RNA
what does helicase do
breaks hydrogen bonds between bases
this seperates + unwinds the 2 strands, exposing nucleotide bases
what bonds does helicase break
hydrogen bonds between bases
what does polymerase do
binds to template strand of DNA
one strand of the DNA is the
felly - template strand for the assembly of the mRNA
steps of transcription
- helicase / polymerase
- free RNA nucleotides align
- polymerase form bonds that add RNA nucleotides
when does RNA polymerase seperate from template strand?
when reaches stop signal
