Checkmite
Skepticifimisticalationist
I'm going to be a bit more specific, just to show off.
DNA consists chiefly of four nucleotides - Guanine, Cytosine, Adenine, and Thymine. Each is typically referred to by its first letter.
The DNA code is a "stencil", or type of template, for creating something called "Messenger RNA", or mRNA for short. mRNA is very similar to DNA, except instead of Thymine, it has a nucleotide called Uracil. So the "alphabet" of RNA is G,C,A, and U. Once the RNA is "forged" using the DNA's instructions, it moves from the nucleus to the cell's ribosomes, which actually produce the proteins.
A chain of RNA is something like a computer program. It contains "codons", or specific sets of instructions for specific tasks. Codons are made of 3 nucleotides. RNA strands are made up of like jillions of nucleotides, so let's invent a segment.
AGGCGAAAUGGUCCGAUCAUGGGUAUAACUAGUCCUCAUG
I just made this segment up out of thin air, but it does contain some real instructions. The first 6 letters in the sequence, AGGCGAA, are "nonsense". Even if they contain real codons, the ribosomes don't do anything because they haven't run across the START instruction codon, which is AUG. (At this point, I have to admit I had to Google for an amino acid table - sorry but I didn't memorize all this stuff
) After AUG, the ribosomes pay attention. The next codon, GUC, makes the amino acid valine. CGA makes arginine, UCA makes serine, UGG makes trytophan, GUA is valine again, and UAA is the STOP codon. All those letters after the STOP codon (CUAGUCCUC) is also "nonsense", because the ribosomes have "stopped", and will not do anything until the AUG, which tells them to start working again. A great deal, if not most, of DNA and the resultant RNA is like that...just extra code that doesn't do anything.
Now, I have no idea which particular protein that combination of amino acids makes, if in fact it makes any at all. But it's a valid example of what we talk about when we say "nonsense code".
DNA consists chiefly of four nucleotides - Guanine, Cytosine, Adenine, and Thymine. Each is typically referred to by its first letter.
The DNA code is a "stencil", or type of template, for creating something called "Messenger RNA", or mRNA for short. mRNA is very similar to DNA, except instead of Thymine, it has a nucleotide called Uracil. So the "alphabet" of RNA is G,C,A, and U. Once the RNA is "forged" using the DNA's instructions, it moves from the nucleus to the cell's ribosomes, which actually produce the proteins.
A chain of RNA is something like a computer program. It contains "codons", or specific sets of instructions for specific tasks. Codons are made of 3 nucleotides. RNA strands are made up of like jillions of nucleotides, so let's invent a segment.
AGGCGAAAUGGUCCGAUCAUGGGUAUAACUAGUCCUCAUG
I just made this segment up out of thin air, but it does contain some real instructions. The first 6 letters in the sequence, AGGCGAA, are "nonsense". Even if they contain real codons, the ribosomes don't do anything because they haven't run across the START instruction codon, which is AUG. (At this point, I have to admit I had to Google for an amino acid table - sorry but I didn't memorize all this stuff
Now, I have no idea which particular protein that combination of amino acids makes, if in fact it makes any at all. But it's a valid example of what we talk about when we say "nonsense code".