Concept explainers
(a)
Interpretation:
The two codons for Glutamic acid and four codons for Valine has to be listed.
Concept Introduction:
The mRNA strand consists of genetic information in the form of
(b)
Interpretation:
The Glutamic acid codons can be converted into Valine codons by a single substitution mutation has to be shown.
Concept Introduction:
The codons are the triplet bases which codes for the amino acids in the protein synthesis. There are 64 codons which are coded for 20 amino acids. Each amino acid is coded by more than one codon.
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Organic Chemistry
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- The base sequences in mRNA that code for certain amino acids are Glu: GAA, GAG Val: GUU, GUC, GUA, GUG Met: AUG Trp: UGG Phe: UUU, UUC Asp: GAU, GAC These sequences are complementary to the sequences in DNA. a. Give the corresponding sequences in DNA for the amino acids listed above. b. Give a DNA sequence that would code for the peptide trp-glu-phe-met. c. How many different DNA sequences can code for the tetrapeptide in part b? d. What is the peptide that is produced from the DNA sequence TACCTGAAG? e. What other DNA sequences would yield the same tripeptide as in part d?arrow_forwardOn complete hydrolysis, a polypeptide gives two alanine, one leucine, one methionine, one phenylalanine, and one valine residue. Partial hydrolysis gives the following fragments: Ala-Phe, Leu-Met, Val-Ala, Phe-Leu. It is known that the first amino acid in the sequence is valine and the last one is methionine. What is the complete sequence of amino acids?arrow_forwardWhich of the following statements about the genetic code are true and which are false? Correct each false statement. a.Each codon is composed of four bases. b.Some amino acids are represented by more than one carbon. c.All codons represent an amino acid. d.Each living species is thought to have its own unique genetic code. e.The codon AUG at the beginning of a sequence is a signal for protein synthesis to begin at that codon. f.It is not known if the code contains stop signals for protein synthesis.arrow_forward
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