Describe5 marksStandard
A eukaryotic gene contains both exons and introns. Describe the events that occur in the nucleus to produce a mature mRNA molecule from this gene, and explain why the removal of introns is essential before translation.
CAIE A Level Biology 9700 · Nucleic acids and protein synthesis
Nucleic acids and protein synthesis: describe question
How this question is marked
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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