Questions tagged [genetic-code]

Tag for questions related to the set of three-letter combinations of nucleotides called codons, each of which corresponds to a specific amino acid or stop signal.

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Why is the genetic code so heavily conserved?

Except some organisms, most organisms follow the same Genetic Code tRNAs, tRNA synthetases, ribosomes, etc. comprise the translational machinery for converting nucleotide codons to proteins. My ...
Asmit Karmakar's user avatar
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How does DNA encode high level features like animal behaviour and language?

We know there are complex features which animals supposed to develop based on their genes as opposed to learning from the environment and the collective, also sometimes being very specific to certain ...
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Does human DNA code for enamel multiple times?

Given that DNA provides instructions for multiple parts of the body as a general representation, how is that about the number of teeth with regards to the enamel code? there are 32 teeth but they are ...
J. Doe's user avatar
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The new DNA study showing that we have two DNA codes and not only one unique code

I am looking for a study that i read maybe 2-3 years ago that i cant find at the moment. Scientist has always believed that humans only have one unique DNA code that makes us who we are, but a ...
Andy Ljunggren's user avatar
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What's the transposon difference between chimps and humans?

I was reading that humans and chimps share 98-99% of the same DNA sequence but I also read humans and chimps only share around 20% of the same proteins. Also, 45% of the human genome is transposable ...
Genetic Avatar's user avatar
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Is DNA actually like source code repository?

So after reading articles like "People Use Just 8.2% of Their DNA" etc., and thinking a bit... I got this idea: What if DNA is actually like a software source code repository? You know, it has "...
ScienceDiscoverer's user avatar
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Double stranded RNA Single stranded DNA

I have seen in textbooks referring to ds RNA and ssDNA. How a RNA can be double stranded and likewise how a DNA can single stranded and if they do exist why are there names not interchanged?
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Are redundant codons used in translation?

I am learning about redundancy in genetics and I came across this statement in my textbook: more than one codon for an amino acid means that some codons are redundant - the process of protein ...
Christopher U's user avatar
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How are mitochondrial ATT (Ile) start codons translated as Methionine?

In some vertebrate species, some mtDNA start codon sequences are ATT but these are translated as Methionine rather than Isoleucine. What is the mechanism for this non-standard translation? The main ...
Spookpadda's user avatar
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Biological terminology: "codes for" vs. "codes a" [closed]

Maybe this is answered already before, but I cannot find it: Most authors say/write "a gene codes for a protein", some use "a gene codes a protein". The latter seems to me the grammatically correct ...
Udo Bellack's user avatar
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Translation of Poly-U in the Nirenberg and Matthaei experiment

In the Nirenberg and Matthaei experiment the artificial mRNA, polyU, was translated into polyphenylalanine in a cell-free system, establishing that UUU was the codon for Phe. How did this work as the ...
Nemexia's user avatar
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Evolution of the Redundancy of the Genetic Code

In short Looking at the genetic code, it appears that most redundancy is on the third letter rather than on the first or the second letter of the codon. Why has it evolved this way? Longer version ...
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Do alternative start codons code for methionine after transcription?

There is some literature which shows that all start codons code for methionine. However, in the standard genetic code, the alternative start codons clearly code for leucine. Does that mean these ...
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Why do three nucleotides code for one amino acid? Why not 5 nucleotides? [duplicate]

We all know why there are 3-base codons, and why there aren't any 2-base codons. But why is there not a 4-base a 5-base codon?
user6318's user avatar