Non-Coding DNA
- The genome within eukaryotic cells contains many non-coding sections of DNA
- Non-coding DNA does not code for any amino acids
- Non-coding DNA can be found between genes, as non-coding multiple repeats
- This means they contain the same base sequences repeated multiple times
- Non-coding DNA can also be found within genes, as introns
- The coding exons can be separated by one or more introns
- During transcription, eukaryotic cells transcribe the whole gene (all introns and exons) to produce pre-mRNA molecules
- Before the pre-mRNA exits the nucleus the non-coding sections (introns) are removed and the coding sections (exons) are joined together in a process called splicing
The RNA molecule produced from the transcription of a gene contains introns that must be removed before translation can occur.
