What are exons and introns? What is the difference between them?
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Introns and exons are parts of genes.
Exons code for whereas introns do not. A great way to remember this is by considering introns as intervening sequences and exons as expressed sequences.
Exons are parts of DNA that are converted into mature messenger RNA (mRNA). The process by which DNA is used as a template to create mRNA is called transcription.
This mRNA then undergoes a further process called translation where the mRNA is used to synthesize proteins via another type of molecule called transfer RNA (tRNA).
Introns are parts of genes that do not directly code for proteins.
Introns can range in size from 10s of base pairs to 1000s of base pairs.
source: http://www.news-medical.net/health/What-are-introns-and-exons.aspx
Read more: Difference Between Exons and Introns | Difference Between | Exons vs Introns http://www.differencebetween.net/science/difference-between-exons-and-introns/ixzz3fvpqGKlG
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