Ashort segment of an mrna molecule is shown below. the polypeptide it codes for is also shown: 5′-auggugcugaag-3′: methionine-valine-leucine-lysine assume that a mutation in the dna occurs so that the fourth base (counting from the 5′ end) of the messenger rna now reads a rather than g. what sequence of amino acids will the mrna now code for? (you do not need a copy of the genetic code to answer the question.)