HDWK Chapter 4 Questions and Answers | Latest Version | Graded A+

HDWK Chapter 4 Questions and Answers | Latest Version | Graded A+ **What does the production of three different polypeptides (polyserine, polyhistidine, and polyisoleucine) from an mRNA with repeating UCA synthesized by Khorana's group indicate?** **This result indicates that the genetic code is a triplet code.** **When Khorana's group synthesized an mRNA with repeating AGU, only polyserine (Ser) and polyvaline (Val) were produced. According to the codon table, why were only two polypeptides produced?** **Only two polypeptides were produced because one of the three possible reading frames consists of stop codons.** **What does the result indicate when a synthetic RNA with the sequence 5' UUUUUUU.....UUUUUU 3' codes for polyphenylalanine (Phe), but another synthetic RNA with the sequence 5' UUUUUU....UUUUU 3' codes for polyphenylalanine that terminates with a single leucine?** **This indicates that translation begins at the 5' end of the mRNA.** **What does the result indicate when a synthetic RNA sequence 5'UUUUUU....UUUUUCN 3', where N stands for any nucleotide, codes for polyphenylalanine (Phe) that terminates with a single serine?** **This indicates that the codons 5' UCN 3' all code for serine.** **According to the codon table, what amino acid sequence results from a synthetic "poly A" mRNA consisting only of A-bearing ribonucleotides?** **The resulting amino acid sequence is polylysine.** **What 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, according to the codon table?** **The sequence is polylysine terminated by a Lys.** **According to the codon table, what amino acid sequence results from a synthetic "poly A" mRNA terminating with a single C at the 3' end when translated in the reading frame indicated by the vertical lines?** **The sequence is polylysine terminated by an Asn.** **What amino acid sequence results from a synthetic "poly A" mRNA terminating with two Cs at the 3' end when translated in the reading