Read the following statements.
(i) One codon codes for only one amino acid.
(ii) Some amino acids are coded by more than one codon.
(iii) The sequence of triplet nitrogenous bases in DNA of mRNA coresponds to the amino acid sequence in the polypeptide chain.
Give , suitabel terms for the characteristics of \'genetic code\' as per the above statements.
Answers
Answer:
'Degeneracy - (ii) , Colinearity - (iii) , Unambiguous - (i)'
Explanation:
As there are 64 combination of the base pairs A,G,U and C possible that are required to code for the 20 major amino acids more than one code can give rise to a single type of amino acid. This is called degeneracy and is exhibited as the multiplicity of three-base pair codon combinations that specify an amino acid. The genetic code is a three-letter (triplet) code defining the transfer of the information from nucleic acids to proteins. Codon is a successive string of three nucleotide and this corresponds to the amino acid sequence in the polypeptide chain. This property of the genetic code is called Colinearity. Even though one amino acid can be coded by different codes, a particular code can give rise to only to a specific amino acid and this is the unambiguous nature of the genetic code. Each codon specifies one amino acid only.
Answer:
'Degeneracy - (ii) , Colinearity - (iii) , Unambiguous - (i)'