difference between exon intron and codon?

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lejefadetumadre
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is an intron just a stop codon? because it isn’t transcribed so i don’t see its purpose :/ if it’s just there not to code for an amino acid which is the whole point of a codon. and exons are just normal codons? since they code for an amino acid
and what is the difference between a structural and non structural gene?
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SAMHANLEY88
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not all DNA codes for proteins or anything. some of its sort of junk. Exon is a coding part of DNA an intron is a noncoding part of DNA.
A codon is a set of 3 DNA bases that code for a protrin
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Daveboi115
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No an intron is not a stop codon, otherwise how could the sequence on the following exon be read? Introns are simply non-coding, that is they do not have an effect on the peptide chain that is produced as they are spliced out of sequence during transcription.

The actual purpose of introns is not within the realm of protein production. Hence why you can’t see it. It is there to act as a dummy sequence for potential mutations. If all DNA was coding and a mutation occurred, then a mutation would always result in an output. When mutations occur, thanks to our introns (and evolution by proxy) there isn’t always an output!

Codons are simply the 3 nucleotides. For example a stop or start codon, and every 3 nucleotides in between.

Structural genes code for anything associated with structure or function. The proteins of a cells cytoskeleton for example. Or more aptly put, they code for any protein that isn’t a regulatory factor. So basically, it will correspond with its amino acid sequence provided it does not regulate gene expression. Non-structural genes are also sometimes called regulatory genes and as you may have guessed work in the opposite way. They code for proteins which regulate gene expression.
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lejefadetumadre
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(Original post by SAMHANLEY88)
not all DNA codes for proteins or anything. some of its sort of junk. Exon is a coding part of DNA an intron is a noncoding part of DNA.
A codon is a set of 3 DNA bases that code for a protrin
thanks
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lejefadetumadre
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(Original post by Daveboi115)
No an intron is not a stop codon, otherwise how could the sequence on the following exon be read? Introns are simply non-coding, that is they do not have an effect on the peptide chain that is produced as they are spliced out of sequence during transcription.

The actual purpose of introns is not within the realm of protein production. Hence why you can’t see it. It is there to act as a dummy sequence for potential mutations. If all DNA was coding and a mutation occurred, then a mutation would always result in an output. When mutations occur, thanks to our introns (and evolution by proxy) there isn’t always an output!

Codons are simply the 3 nucleotides. For example a stop or start codon, and every 3 nucleotides in between.

Structural genes code for anything associated with structure or function. The proteins of a cells cytoskeleton for example. Or more aptly put, they code for any protein that isn’t a regulatory factor. So basically, it will correspond with its amino acid sequence provided it does not regulate gene expression. Non-structural genes are also sometimes called regulatory genes and as you may have guessed work in the opposite way. They code for proteins which regulate gene expression.
thank you that makes a lot more sense now
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