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Codons

Codon

(Science: molecular biology) The coding unit of dna that specifies the function of the corresponding messenger rna.

a triplet of bases recognised by anticodons on transfer rna and hence specifying an amino acid to be incorporated into a protein sequence. The code is degenerate, i.e. Each amino acid has more than one codon. The stop codon determines the end of a polypeptide.


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Re: translation from DNA

That's a reasonable idea. I can imagine a ribosome directly binding to DNA to translate the DNA codons directly into protein. We can't really tell why that didn't happen, as much of the early development of life occurred far in the past and left no evidence of the steps ...

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by jonmoulton
Mon Sep 29, 2014 3:03 pm
 
Forum: Molecular Biology
Topic: translation from DNA
Replies: 2
Views: 229

translation from DNA

why come proteins need RNA for translation. why cant they translate from DNA itself... All it needs is triplet of codons which can be provided by DNA too??

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by jannat
Sun Sep 28, 2014 6:27 am
 
Forum: Molecular Biology
Topic: translation from DNA
Replies: 2
Views: 229

Another molecular question

... because most of amino acids are coded by more than one triplet. But if you manage to select piece where are mostly AAs coded by only one or two codons, you could prepare degenerated probes and use them for the hybridization. However, that will not work for hemoglobin in erythrocytes.

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by JackBean
Wed Aug 21, 2013 1:37 pm
 
Forum: Molecular Biology
Topic: Another molecular question
Replies: 3
Views: 1195

Re: Explain why Genetic Code is called "Rosetta Stone" of life?

Our genetic information is translated into codons, which can then be read and utilized by our RNA. It's like translating it into a different language. I think that is more along the lines of what your professor was looking for. Your answer was ...

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by Tbuie
Sun Aug 04, 2013 4:30 pm
 
Forum: Genetics
Topic: Explain why Genetic Code is called "Rosetta Stone" of life?
Replies: 11
Views: 8981

Re: Have all human genes been identified?

... one function of an mRNA, there may be more functions of alternative-spliced products of the gene waiting to be identified. Also: Alternative start codons Alternative poly-A tailing RNA editing (such as conversion of a base to inosine) Association of peptide chains into quartenary structures, with ...

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by jonmoulton
Thu Nov 29, 2012 6:43 pm
 
Forum: Molecular Biology
Topic: Have all human genes been identified?
Replies: 3
Views: 1594
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