Genetic code

Genetic code is the set of rules by which information encoded in genetic material (DNA or mRNA sequences) is translated into proteins (amino acid sequences) by living cells. The code defines how sequences of these nucleotide triplets, called codons, specify which amino acid will be added next during protein synthesis.

Overview

The genetic code is the set of rules used by living cells to translate information encoded in genetic material (DNA or mRNA sequences) into proteins. Proteins are made up of amino acids and are essential to the functioning of organisms. The code is defined by the sequence of nucleotides, which are the building blocks of DNA and RNA. These sequences are read in groups of three, known as codons. Each codon corresponds to a specific amino acid.

Codons

A codon is a sequence of three DNA or RNA nucleotides that corresponds with a specific amino acid or stop signal during protein synthesis. DNA and RNA molecules are written in a language of four nucleotides; in the case of DNA, these are adenine (A), cytosine (C), guanine (G), and thymine (T). In RNA, uracil (U) is used instead of thymine.

Translation

Translation is the process by which the genetic code is used to synthesize proteins from RNA. This process takes place in the ribosome, a cellular organelle where protein synthesis occurs. During translation, an mRNA sequence is read using the genetic code to produce a specific protein.

Genetic Code Properties

The genetic code has several properties. It is a triplet code, meaning it is read in groups of three nucleotides. It is non-overlapping, meaning each nucleotide is part of only one codon. It is degenerate, meaning more than one codon can specify the same amino acid. It is also universal, meaning it is used by almost all organisms.

See Also

• DNA
• RNA
• Protein synthesis
• Codon
• Translation (biology)

Genetic code Resources
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