Essential Organic Chemistry (3rd Edition)
3rd Edition
ISBN: 9780321937711
Author: Paula Yurkanis Bruice
Publisher: PEARSON
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Textbook Question
Chapter 21, Problem 20P
What would be the base sequence of the segment of DNA responsible for the biosynthesis of the following hexapeptide?
Gly-Ser-Arg-Val-His-Glu
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A portion of one strand in a DNA molecule has the following sequence of bases
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An opioid pentapeptide has the following structure: Tyr-Cys-Gly-Phe-Cys
Write its structure following mild oxidation.
Chapter 21 Solutions
Essential Organic Chemistry (3rd Edition)
Ch. 21.1 - Draw the structure for each of the following: a....Ch. 21.3 - If one of the strands of DNA has the following...Ch. 21.4 - The 2,3-cyclic phosphodiester that is formed...Ch. 21.5 - Using a dark line for the original parental DNA...Ch. 21.7 - Why do both thymine and uracil specify the...Ch. 21.9 - If methionine is always the first amino acid...Ch. 21.9 - Four Cs occur in a row in the segment of mRNA...Ch. 21.9 - UAA is a stop codon. Why does the UAA sequence in...Ch. 21.9 - A change in which base of a codon would be least...Ch. 21.9 - Write the sequences of bases in the sense strand...
Ch. 21.9 - List the possible codons on mRNA that specify each...Ch. 21.10 - Adenine can be deaminated to hypoxanthine, and...Ch. 21.10 - Explain why thymine cannot be deaminated.Ch. 21.12 - Which of the following base sequences would most...Ch. 21 - Draw structures for the following: a....Ch. 21 - What nonapeptide is coded for by the following...Ch. 21 - What is the sequence of bases in the template...Ch. 21 - What is the sequence of bases in the sense strand...Ch. 21 - What would be the C-terminal amino acid if the...Ch. 21 - What would be the base sequence of the segment of...Ch. 21 - Propose a mechanism for the following reaction:Ch. 21 - A segment of DNA has 18 base pairs. It has 7...Ch. 21 - Match the codon with the anticodon: Codon: AAA GCA...Ch. 21 - Using the single-letter abbreviations for the...Ch. 21 - Indicate whether each functional group of the five...Ch. 21 - Using the A and D designations in Problem 25,...Ch. 21 - Which of the following pairs of dinucleotides are...Ch. 21 - If an mRNA contained only U and G in random...Ch. 21 - Why is the codon a triplet rather than a doublet...Ch. 21 - Human immunodeficiency virus (HIV) is the...Ch. 21 - The amino acid sequences of peptide fragments...Ch. 21 - Which cytosine in the following sense strand of...Ch. 21 - Prob. 33PCh. 21 - Why does DNA not unravel completely before...Ch. 21 - The first amino acid incorporated into a...
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- There are six isomeric tripeptides that contain valine, tyrosine, and glycine. Name them using both three- and one-letter abbreviations.arrow_forwardDraw Fisher projections representing the D and L forms of the following: a.serine b.valinearrow_forwardDraw the structure of hexapeptide NH3+-MIGHTY-COO-arrow_forward
- The 20 standard amino acids are called ⍺-amino acids. Certain β-amino acids are found in nature. Draw the structure of β-alanine (3-amino-n-propionate).arrow_forwardDraw the formula of each of the following tripeptides: (a)Aspartic acid- histidine- tryptophan (b) Glycine- cysteine with the charges that exist in the cell fluid (c) Lysine-phenylalanine- threonine (d)Alanine- leucine- valine with the charges that exist in fluidarrow_forwardDraw the formula of each of the following tripeptides a. aspartic acid-histidine-tryptophan b. alanine-leucine-valine with the charges that exist in cell fluid c. lysine-phenylalanine-threonine d. glysine-cysteine-tyrosine with the charges that exist in cell fluidarrow_forward
- What dipeptides would be formed by heating a mixture of valine and N-protected leucine?arrow_forwardAn opioid pentapeptide has the following structure: Tyr-Cys-Gly-Phe-Cys Draw the structure of the pentapeptide including all the side chains.arrow_forwardWhat is the primary structure of a polypeptidearrow_forward
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