Becker's World of the Cell 9th Edition by Lewis Kleinsmith, Jeff Hardin, Gregory Paul Bertoni

Exercise 2

The Genetic Code in a T-Even Phage. A portion of a polypeptide produced by bacteriophage T4 was found to have the following sequence of amino acids:

Deletion of a single nucleotide from one location in the T4 DNA template strand with subsequent insertion of a different nucleotide nearby changed the sequence to:

(a)What was the nucleotide sequence of the mRNA segment that encoded this portion of the original polypeptide
(b)What was the nucleotide sequence of the mRNA encoding this portion of the mutant polypeptide
(c)Can you determine which nucleotide was deleted and which was inserted Explain your answer.