BB1720 DNA: transcription Flashcards
what is transcription?
the production of RNA from DNA
what is RNA made up of?
4 nucleobases uracil (U), adenine (A), cytosine (C), and guanine (G).
what is the sugar in rna?
ribose
what happens to exons?
they are transcribed, and the RNA ends up in the mature mRNA
what happens to introns?
they are transcribed and the RNA is removed to make the mature mRNA.
how many single rna polymerase do bacteria have?
one
how many rna polymerase do eukaryotes have?
three
when does RNA capping occur?
after the first 25 nucleotides appear
what does the cap signal?
that the RNA molecule is a mRNA
what is the spliceosome?
a complex of 5 snRNA molecules and several hundred proteins.
does one human gene give one protein?
no, due to exon skipping, it is possible for one gene to give many different final proteins.
