Single Choice

Choose the correct answer from the alternatives given : 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 or mRNA corresponds to the amino acid sequence in the polypeptide chain. Give suitable terms for the characteristics of genetic code as per the above statements.

ADegeneracy - (i), Colinearity - (ii), Unambiguous - (iii)
BDegeneracy - (iii) , Colinearity - (ii) , Unambiguous - (i)
CDegeneracy - (ii) , Colinearity - (iii) , Unambiguous - (i)
Correct Answer
DDegeneracy - (i) , Colinearity (ii) , Unambiguous - (iii)

Solution

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.
So, the correct option is 'Degeneracy - (ii) , Colinearity - (iii) , Unambiguous - (i)'.

SIMILAR QUESTIONS

Genetics

Select the correct option regarding genetic code of Glycine.

Genetics

Match column I with column II and select the correct option from the-given codes. Column I (Codons) Column II (Translated amino acid) A. UUU (i) Serine B. GGG (ii) Methionine C. UCU (iii) Phenylalanine D. CCC (iv) Glycine E. AUG (v) Proline

Genetics

Choose the correct answer from the alternatives given : An organism uses 20 amino acids while its DNA is made up of 6 types of nitrogenous bases. What would be the minimum size of a codon?

Genetics

One of the following is true with respect to AUG

Genetics

Which of the following Is correct regarding genetic code?

Genetics

Find the sequence of binding of the following amino acyl-tRNA complexes during translation of an mRNA transcribed by a DNA segment having the base sequence 3'TACATGGGTCCG5'. Choose the answer showing the correct order of alphabets.

Genetics

In an in vitro translation experiment, poly(UC) RNA template produced poly(Ser-Leu), while poly(AG) RNA template produced poly (Arg-Glu) polypeptide. Which one of the following options represents correct interpretations of the codons assignments for Ser, Leu, Arg, and Glu.

Genetics

A protein with $$100$$ amino acid residues has been translated based on triplet genetic code. Had the genetic code been quadruplet, the gene that codes for the protein would have been.

Genetics

One of the following is true with respect to AUG

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