NEET Biology | Genetic Code tricks by Pooja ma'am | Tricks for biology

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The salient features of genetic code are as follows:
(i) The codon is triplet. 61 codons code for amino acids and 3 codons do
not code for any amino acids, hence they function as stop codons.
(ii) One codon codes for only one amino acid, hence, it is
unambiguous and specific.
(iii) Some amino acids are coded by more than one codon, hence
the code is degenerate.
(iv) The codon is read in mRNA in a contiguous fashion. There are
no punctuations.
(v) The code is nearly universal: for example, from bacteria to human
UUU would code for Phenylalanine (phe). Some exceptions to this
rule have been found in mitochondrial codons, and in some
protozoans.
(vi) AUG has dual functions. It codes for Methionine (met) , and it
also act as initiator codon.

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