Unit 7 Nucleic Acids Flashcards
1
Q
Three steps of post-transcriptional modifications
A
Capping, splicing and polyadenylation
2
Q
Capping is…
A
Addition of a methyl group at the start of the mRNA
3
Q
Purpose of polyadenylation
A
Facilitates transport and improves stability.
4
Q
Splicing is…
A
Removal of introns - they are non-coding DNA.
5
Q
Purpose of capping
A
Recognition and protection from degrading.
6
Q
All proteins used in replication (hl) in order
A
DNA helicase, DNA gyrase, Single stranded binding proteins, DNA primase, DNA polymerase III, DNA polymerase I, DNA ligase
7
Q
Function of single stranded binding proteins
A
They keep the DNA strands apart from each other, avoid recoiling and (prevents digestion by nucleases.)
