4.1.7 Non-Coding DNA Flashcards
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
Non-coding DNA can be found between genes, as
non-coding multiple repeats
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
Non-coding DNA can also be found within genes, as
introns
Non-coding DNA can also be found within genes, as introns, the coding what can be separated by one or more introns
exons
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
Before the pre-mRNA exits the nucleus the non-coding sections (introns) are removed and the coding sections (exons) are
joined together
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