2007-01-05 00:13:58 · 7 answers · asked by joke b 1 in Science & Mathematics ➔ Biology
in DNA, RNA, rRNA, tRNA and mRNA
2007-01-05 00:18:24 · update #1
A triplet code is three bases which code for an amino acid. The triplet code (or codon) GTA in DNA codes for valine ( the bases guanine, thymine and adenine). In protein synthesis, a copy a bit like a negative in photography is made, with the bases that pair to these. This is messenger RNA (mRNA). Because RNA has a different make-up to DNA - it's sugar is ribose, not deoxyribose - it doesn't contain thymine, as the sugar can't bind this base effectively. So in RNA, thymine becomes uracil. The negative of the GTA code is now CAU. The messenger RNA is bound to by tRNA, which is three bases together, attached to an amino acid. These three bases will recognise their opposites on the mRNA. The three on tRNA are GUA. In this way valine, and the other amino acids, are organised in the right order to make a protein.
2007-01-08 04:48:29 · answer #1 · answered by cheetara_2001 2 · 1⤊ 0⤋
Triplet codes, or codons, are the three nucleotide codes in RNA that code for amino acids and so eventually for proteins. The three letter code in mRNA is recognised by the anti-codon of tRNAs (that have collected the appropriate amino acid). With the help of a ribosome, the mRNA is fed through, the tRNAs bring the amino acids and the ribosome strings them together almost like beads on a thread. The amino acids interact with each other and come together to form a protein.
2007-01-05 08:25:24 · answer #2 · answered by milliemollie 1 · 0⤊ 1⤋
The genetic code consists of 64 triplets of nucleotides. These triplets are called codons.With three exceptions, each codon encodes for one of the 20 amino acids used in the synthesis of proteins. Each codon consists of three nucleotides, representing a single amino acid.
The genetic code is almost universal. The same codons are assigned to the same amino acids and to the same START and STOP signals in the vast majority of genes in animals, plants, and microorganisms. However, some exceptions have been found. Most of these involve assigning one or two of the three STOP codons to an amino acid instead.
2007-01-05 08:23:18 · answer #3 · answered by Biofav 2 · 1⤊ 1⤋
A triplet code is a group of three nucleotides coded for a single amino acid.
2007-01-05 08:31:49 · answer #4 · answered by M M 4 · 1⤊ 0⤋
3 nucleotides that code for specific amino acids
2007-01-05 22:32:58 · answer #5 · answered by fluzz4112 2 · 1⤊ 0⤋
Triplet codes are sets of three bytes that define non displayable packet content in teletext transmission.
2007-01-05 08:16:31 · answer #6 · answered by Anonymous · 0⤊ 2⤋
in gene coding that means every three amino acids arrangement interpret a specific gene
2007-01-05 08:17:28 · answer #7 · answered by Anonymous · 0⤊ 2⤋