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Introns And Exons
Part 1 of Paper
....ies 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 by RNA polymerase
enzymes. The transcription begins at the promoter sequence on the DNA and works
down, thus the nucleo.... Part 2 of Paper
....rotein.
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; in between the exons the non-coding region called introns
exist. Before the translation of mRNA the introns must be spliced off.
Splicing is an complicated process for the cell. It must locate every intron in
the primary transcript. An average mRNA consists of eight to ten introns, some
even contain sixteen in.... |
| Number of words: 653 - Approximate pages: 3 |
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