chapter 4 HDWK QUESTIONS WITH 100% PASSED ANSWERS

a synthetic mRNA is created by random polymerization of an equal mixture of C bearing and G bearing ribonucleotides. according to the codon table, what is the expected amino acid composition of the resulting polypeptide product? - equal amounts of Ala, Arg, Gly and Pro a synthetic RNA sequence 5'UUUUUU....UUUUUCN 3', where the N stands for any nucleotide, codes for polyphenylalanine (Phe) that terminates with a single serine. what does this result? - the codons 5' UCN 3' all code for serine a synthetic RNA with the sequence 5' UUUUUUU.....UUUUUU 3' codes for polyphenylalanine (Phe). one synthetic RNA with the sequence 5' UUUUUU....UUUUU 3' codes for polyphenylaline that terminates with a sinlge leucine. what does this result indicate? - translation begins at the 5' end of the mRNA according to the codon table, what sequence of synthetic mRNA codes for a mixture of polythreonine, polyleucine, and polytyrosine? - repeating UAC according to the codon table, which amino acid sequence results from a synthetic "poly A" mRNA consisting only of A bearing ribonucleotides ? - polylysine according to the codon table, which amino acid sequence results from a synthetic "poly A" mRNA terminating with a single C and the 3' end when translated in the reading frame indicated by the vertical lines? - polylysine terminated by an Asn according to the codon table, which amino acid sequence results from a synthetic "poly A" mRNA terminating with a single G at the 3' end when translated in the reading frame indicated by the vertical lines? - polylysine terminated by a Lys according to the codon table, which amino acid sequence results from a synthetic "poly A" mRNA terminating with a two Cs at the 3' end when translated in the reading frame indicated by the vertical line? - polylysine terminated by a Thraccording to the codon table, which amino acid sequence(s) results from a synthetic mRNA consisting of alternating As and Cs? - alternating Thr and His according to the codon table, which amino acid sequence(s) results from a synthetic mRNA consisting of repeats of the codon 5' ACG 3'? - polythreonine, polyarginine, and polyaspartic acid according to the codon table, which amino acid sequence(s) results from a synthetic mRNA consisting of repeats of the codon 5'AUG3'? - polymethionine and polyaspartic acid according to the codon table, which sequence of synthetic mRNA codes for a polypeptide consisting of alternating Ser and Leu? - repeating UC when Khorana's group synthesized an mRNA with repeating AGU, only two polypeptides were produced: polyserine (Ser) and polyvaline (Val). according to the information in the codon table, why were only two polypeptides produced? - one of the three possible reading frames consists of stop codons when Khorana's group synthesized an mRNA with repeating UCA, three different polypeptides were produced: polyserine (Ser), polyhistidine (His), and polysoleucine (Ile). what does this result indicate? - the genetic code is a triplet code