Gene Expression (b) Flashcards
1
Q
describe the role of RNA polymerase in
transcription of DNA into primary mRNA
transcripts.
A
RNA polymerase moves along DNA
unwinding the double helix and breaking
the hydrogen bonds between the bases.
RNA polymerase synthesises a primary
transcript of mRNA from RNA nucleotides
by complementary base pairing.
2
Q
What does RNA splicing form?
A
The mature mRNA transcript.
3
Q
Describe an Intron
A
The introns of the primary transcript are
non-coding regions and are removed.
4
Q
Describe an exon
A
The exons are coding regions and are joined together to form the mature transcript. The order of exons is unchanged during splicing.
