Organic Chemistry
11th Edition
ISBN: 9781118133576
Author: T. W. Graham Solomons, Craig Fryhle
Publisher: Wiley, John & Sons, Incorporated
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Question
Chapter 25, Problem 8PP
Interpretation Introduction
Interpretation:
The intermediate formed during the conversion of adenine to hypoxanthine, hydrogen bonds of hypoxanthine-cytosine base pair and the consequences it would have through two rounds of DNA (deoxyribonucleic acid) replication is to be shown.
Concept Introduction:
▸ Normally, in DNA, adenine pairs with thymine by forming two hydrogen bonds. On treatment with nitrous acid, amino group of adenine undergoes changes to form diazonium and finally gets removed.
▸ Hypoxanthine forms two hydrogen bonds with cytosine instead of thymine. This mispairing then passes on to the daughter DNA formed during replication and further brings about permanent changes (mutations).
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Draw the structure of leu-enkephalin, a pentapeptide that acts as an analgesic and opiate, and has the following sequence: Tyr–Gly–Gly–Phe–Leu. (The structure of a related peptide, met-enkephalin, appeared in Section 22.6B.)
Which statement best explains the chemical differencesbetween DNA and RNA? (a) DNA has two different sugarsin its sugar–phosphate backbone, but RNA only has one.(b) Thymine is one of the DNA bases, whereas RNA’s correspondingbase is thymine minus a methyl group. (c) TheRNA sugar–phosphate backbone contains fewer oxygenatoms than DNA’s backbone. (d) DNA forms double helicesbut RNA cannot.
What amino acid does each abbreviation stand for?
(a) Phe
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(c) Asp
(d) Gln
(e) His
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Chapter 25 Solutions
Organic Chemistry
Ch. 25 - Prob. 1PPCh. 25 - Prob. 2PPCh. 25 - Prob. 3PPCh. 25 - Prob. 4PPCh. 25 - Prob. 5PPCh. 25 - Practice Problem 25.6 (a) There are approximately...Ch. 25 - Prob. 7PPCh. 25 - Prob. 8PPCh. 25 - Prob. 9PPCh. 25 - Practice Problem 25.10
The sense strand of a...
Ch. 25 - Practice Problem 25.11
(a) Using the first codon...Ch. 25 - Write the structure of the RNA dinucleotide GC in...Ch. 25 - 25.13 Write the structure of the DNA dinucleotide...Ch. 25 - The example of a silylHilbertJohnson...Ch. 25 - Prob. 15PCh. 25 - Prob. 16PCh. 25 - Research suggests that expression of certain genes...
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