Organic Chemistry (8th Edition)

8th Edition

ISBN: 9780134042282

Author: Paula Yurkanis Bruice

Publisher: PEARSON

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Concept explainers

Coding Strand of DNA

When pointing to DNA transcription, the coding strand is found to be the DNA strand whose base sequence is indistinguishable from the base sequence of the RNA transcript developed. It is this strand that comprises the codons, while the non-coding strand …

Nucleotide

Both DNA and RNA are composed of organic molecules known as nucleotides. Hence, nucleotides are known as the basic building blocks of nucleic acids. These substances play a role in various processes such as cell signalling, enzyme reactions, metabolism, …

Structure of Cytosine

Cytosine is among the five primary nitrogenous bases of which DNA and RNA and are being used in storage and transportation of genetic makeup within a cell. Adenine, guanine, thymine as well as uracil are the remaining four nucleobases.

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Textbook Question

Chapter 26, Problem 39P

Staphylococcus nuclease is an enzyme that catalyzes the hydrolysis of DNA.

The reaction is catalyzed by Ca²⁺, Glu 43, and Arg 87. Propose a mechanism for this reaction. Recall that the nucleotides in DNA have phosphodiester linkages.

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Chapter 26, Problem 38P

Chapter 27.3, Problem 1P

Chapter 26 Solutions

Organic Chemistry (8th Edition)

Ch. 26.1 - In acidic solutions, nucleosides are hydrolyzed to...Ch. 26.1 - Draw the structure for each of the following: a....Ch. 26.3 - Indicate whether each functional group of the five...Ch. 26.3 - Prob. 4P Ch. 26.3 - If one of the strands of DNA has the following...Ch. 26.4 - The 2',3-cyclic phosphodiester that is formed...Ch. 26.5 - Using a dark line for the original parental DNA...Ch. 26.7 - Why do both thymine and uracil specify the...Ch. 26.9 - If methionine is always the first amino acid...Ch. 26.9 - Four Cs occur in a row in the segment of mRNA...

Ch. 26.9 - UAA is a stop codon. Why does the UAA sequence in...Ch. 26.9 - Prob. 12P Ch. 26.9 - Write the sequences of bases in the sense strand...Ch. 26.9 - List the possible codons on mRNA that speciy each...Ch. 26.10 - Adenine can be deaminated to hypoxanthine, and...Ch. 26.10 - Explain why thymine cannot be deaminated.Ch. 26.12 - Which of the following base sequences is most...Ch. 26 - What nonapeptide is coded for by the following...Ch. 26 - What is the sequence of bases in the template...Ch. 26 - Prob. 20P Ch. 26 - A segment of DNA has 18 base pairs. It has 7...Ch. 26 - Name the following:Ch. 26 - Prob. 23P Ch. 26 - Propose a mechanism for the following reaction:Ch. 26 - The first amino acid incorporated into a...Ch. 26 - Match the codon with the anticodon:Ch. 26 - a. Using the single-letter abbreviations for the...Ch. 26 - Which of the following pairs of dinucleotides are...Ch. 26 - Human immunodeficiency virus (HIV) is the...Ch. 26 - If a mRNA contained only U and G in random...Ch. 26 - Why is the codon a triplet rather than a doublet...Ch. 26 - RNAase, the enzyme that catalyzes the hydrolysis...Ch. 26 - The amino acid sequences of peptide fragments...Ch. 26 - Which cytosine in the following sense strand of...Ch. 26 - Prob. 36P Ch. 26 - Sodium nitrite, a common food preservative (page...Ch. 26 - Why does DNA not unravel completely before...Ch. 26 - Staphylococcus nuclease is an enzyme that...

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22-20 Show how alanine, in solution at its isoelectric point, acts as a buffer (write equations to show why the pH does not change much if we add an acid or a base).
22-49 Based on your knowledge of the chemical properties of amino acid side chains, suggest a substitution for leucine in the primary structure of a protein that would probably not change the character of the protein very much.

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