1. Tardigrade
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  3. Biology
  4. In E. coli, a finished polypepride has 162 amino acids of which the first amino acid is not a methionine compound. How many nucleotides of DNA are required to code this polypeptide?

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Q. In E. coli, a finished polypepride has 162 amino acids of which the first amino acid is not a methionine compound. How many nucleotides of DNA are required to code this polypeptide?

EAMCETEAMCET 2006

Solution:

There is an intimate connection between genes and synthesis of polypeptides or enzymes. The relationship between the sequence of amino acids in a polypeptide and nucleonde sequence of DNA or m-RNA is called genetic code. To code a polypeptide of 162 amino acids 486 nucieotides required but here methionine absent therefore 489 nucieotides required and methonine may remove from polypeptide later.