Gene Expression (b) Flashcards

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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.

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2
Q

What does RNA splicing form?

A

The mature mRNA transcript.

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3
Q

Describe an Intron

A

The introns of the primary transcript are
non-coding regions and are removed.

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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.

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