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Essay Galaxy - Introns and Exons
Introns and Exons
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 by RNA polymerase
enzymes. The transcription begins at the promoter sequence on the DNA and works
down, thus the nucleotide sequence of the mRNA is complimentary to the one of
DNA. In eukaryotes the mRNA is processed in the nucleus before transport to the
cytoplasm for translation. In order for the mRNA to become true functioning
RNA it must under go several stages of modification.
At first, when the mRNA is produced, a cap is added enzymaticully to the
5¹ end of the RNA by linking a 7-methylguanosine resid....
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Number Of Pages: 3 |
Number Of Words: 670 |
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