Transcription Flashcards
(17 cards)
What is the main carrier resulting from transcription?
mRNA
Which nucleobases are purines?
guanine and alanine
Which nucleobases are pyrimidines?
cytosine, uracil, thymine
How many bonds can a sugar edge form?
1
How many bonds can a Hoogsteen edge form?
2
How many bonds can a watson-crick edge form?
3
How is the Hoogsteen edge different compared to the Watson-Crick edge?
It can accept non-conventional pairings, either in the form of different pairs (AC) or different rotations of an expected pairing.
Are Watson-Crick base pairings the strongest?
Not always! Non-conventional pairings can be as strong or stronger than some Watson-Crick pairings
What is the majority of RNA and where is it located?
rRNA, ribosomes
Intergenic DNA is located …
Between genes
Intragenic DNA is located …
Within a gene
What are 4 major differences between transcription in prokaryotes and eukaryotes?
Location: cytoplasm vs nucleolus
Polymerases: one vs three
Factors: sigma vs transcriptional
Mediator complex: No vs yes
What are the 5 steps of RNA synthesis?
Initiation, Transcription, Elongation, Termination, Post-Processing
What are two types of termination for prokaryotes?
Intrinsic termination
Rho-dependent termination
What is a type of termination for eukaryotes?
Polyadenylation
What are introns?
A non-coding portion of RNA that is snipped away.
What are ribozymes?
Ribosomes that are autocatalytic (act as enzymes)
