Flashcards in Chapter 9 -2 Deck (11):
What does RNA polymerase do in the initiation of transcription?
binds to a promoter region in the template DNA
Adds complementary RNA bases
What signals the start of a gene?
What does the binding of RNA polymerase require?
What do Eukaryotes have?
pre mRNA modifications
What do pre mRNA transcript consists of?
exons and introns
What are exons?
What are introns?
intervening, non coding regions
What is the cap and what is the tail?
5' guanine cap
Poly(A) tail at 3' end
What does the cap serve as?
recognition sequence for translation machinery
What does the tail do?
protects against degradation