Biology A-Level
splicing
What splicing means in Biology A-Level, as defined for AQA.
Definitions of splicing
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Reference: AQA
Spliceosomes cut the pre-mRNA at the intron-exon boundaries, remove the introns and join the exons together, forming mature mRNA.
Introns are removed from pre-mRNA, and the same pre-mRNA can be spliced in different combinations.
The removal of introns, occurring in the nucleus before the messenger RNA reaches a ribosome.
Removes the introns and joins the exons, giving mature messenger RNA.
Topics that use splicing
- DNA and protein synthesis (AQA A-Level)
- DNA, genes and chromosomes (AQA A-Level)
- Using genome projects (A-level only) (AQA A-Level)
Related terms
- introns and exons
- genome
- non-coding DNA
- alleles
- alternative splicing
- base sequence
- chromatin
- circular organelle DNA
Using splicing in the exam
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