A codon is a sequence of three nucleotides in DNA or RNA that either codes for a particular amino acid or tells the cellular machinery to start or stop using the code. A group of codons starts with the initiation codon. It then has codons in sequence that gives instructions on the amino acids to use to build a protein, and it then has a stop codon to signal when the protein assembly is complete. Normally, there is one initiation codon and three stop codons, and most amino acids are represented by more than one codon.Know More
There are 64 possible codons, each composed of three of the four possible nucleotides, but only 20 amino acids are found in most biological systems. Accordingly, there is a great deal of redundancy, such as the amino acid valine with four codons. Only tryptophan and methionine have only one codon each. The codon for methionine is the same as the start codon, which is interpreted based on context.
The genetic language in codons is almost universal in life, but there are a few exceptions. One that is found in most forms of multicellular life is the mitochondria, the engergy production centers of eukaryotic cells, which have their own minimal genetic content and a slightly different genetic code.Learn more about Molecular Biology & DNA
Each amino acid is made of three base triplet codes called codons. Codons are made of three combinations of four available nucleotides. There are 64 potential combinations of codons.Full Answer >
A codon is a sequence of three nitrogenous bases that code for a single amino acid. Each codon is made up of three of the four bases: adenine, thiamine, guanine and cytosine. These are typically identified by their initials, A, T, G and C. In RNA, uracil replaces thiamine.Full Answer >
A codon is a series of three nucleotides used to specify a specific an amino acid. These nucleotides are labeled with G, C, and A and are found in both RNA and DNA. T-containing codons are found in only DNA, and U-containing codons only in RNA.Full Answer >
A nonsense codon has the effect of prematurely stopping the transcription of RNA or DNA and preventing the effective synthesis of polypeptide chains. DNA works by coding the instructions for protein synthesis. This is accomplished by cellular machinery assembling amino acids into long chains that, when the sequence is terminated, fold into proteins. A premature stop instruction cuts the process short and prevents the synthesis of useful proteins.Full Answer >