Polypeptide Synthesis - Transcription And Splicing Flashcards
0
Q
What enzyme breaks the hydrogen bonds between a DNA strand and exposes its nucleotide bases?
A
DNA Helicase
1
Q
What is spliced to form mRNA?
A
Pre-mRNA
2
Q
Which enzyme moves along the template strand and joins complimentary nucleotides to the exposed bases?
A
DNA Polymerase
3
Q
At what point does the RNA Polymerase detach from the template strand?
A
When it recognises a ‘stop’ triplet code
4
Q
What are exons and introns?
A
Exons are sections that code for proteins whereas introns are non-coding
5
Q
What is the purpose of splicing?
A
To remove intervening, non-functional introns and join the functional exons together
6
Q
What can affect the splicing of pre-mRNA?
A
Mutations and certain disorders such as Alzheimer’s
