Introns And Exons
Beginning of paper
AP. Biology essay
The finding of the Introns and the exons was one of the most significant
discoveries in genetics in the past fifteen years. split genes were discovered
when lack of relation between DNA sequences were seen during. DNA- mRNA
hybridation. For all new mRNA, they must be transcribed ....
Middle of paper
.... codon to
start translation. As the mRNA comes finishes transcription, the Poly A tail is
added to the 3¹ end. As the two ends are placed the mRNA becomes pre-mRNA.
The pre-mRNA consists of splicing and non-coding regions. pre-mRNA
molecules are much longer than the mRNA molecule needed to code for its protein.
The regions that do not code for amino acids; aa, are scattered all along the
coding region. The genes are split with coding regions, called exons, short for
expressed regions; ....
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Word count: 653
Page count: 3 (approximately 250 words per page)
