Essential Organic Chemistry (3rd Edition)
3rd Edition
ISBN: 9780321937711
Author: Paula Yurkanis Bruice
Publisher: PEARSON
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Chapter 21, Problem 34P
Why does DNA not unravel completely before replication begins?
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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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- Write the base sequence for the mRNA that would be formed during transcription from the DNA strand with the base sequence GCCATATTG.arrow_forwardWhich base is found in DNA but not in RNA? a. thymine b. cytosine c. guanine d. adeninearrow_forwardThe DNA template strand segment 3TTCAAACCGTAC5 upon transcription and translation produces the amino acid sequence Lys-Phe-Gly-Met. What is the amino acid sequence produced if a frameshift mutation occurs in which the third A base in the original DNA sequence is removed?arrow_forward
- In the flow of genetic information, what is meant by the terms transcription and translation?arrow_forwardIs the trinucleotide in Problem 22-32 found only in DNA, found only in RNA, or found in both DNA and RNA? Explain the basis for your answer.arrow_forwardDraw the Lewis diagram for the DNA fragment that is complementary to the guanine-thymine-adenine DNA fragment.arrow_forward
- a Describe the three components of a nucleotide. b How does the structure of an RNA nucleotide differ from that of a DNA nucleotide?arrow_forwardHow does the DNA content determine what reactions occur within an organism?arrow_forwardHow many total hydrogen bonds would exist between the following strands of DNA and their complementary strands? a. GCATGC b. TATGGCarrow_forward
- DNA Complementarity Draw the complementary strand for the DNA shown.arrow_forwardSuppose that 28% of the nucleotides in a DNA molecule are deoxythymidine 5'-monophosphate, and that during DNA replication the percentage amounts of available nucleotide bases art 22% A, 22% C, 28% G. and 28% T. Which base would be depleted first in the replication process?arrow_forwardGiven the following nucleotide sequence in DNA: 5' TCGTAGGAT 3': (a) Determine the sequence of the complementary strand of DNA. Report this sequence by writing it from its 5' end to its 3' end. (b) Write the sequence (5'-3') for the strand of mRNA that would be complementary to the original strand of DNA. (c) Assuming that this sequence is part of the coding sequence for a protein and that it is properly lined up so that the first codon of this sequence begins with the 5' nucleotide of the mRNA, write the sequences for the three anti- codons that would be complementary to this strand of mRNA. (d) What sequence of amino acids is selected by this mRNA? (The complete genetic code is listed in several sites on the Internet.)arrow_forward
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Nucleic acids - DNA and RNA structure; Author: MEDSimplified;https://www.youtube.com/watch?v=0lZRAShqft0;License: Standard YouTube License, CC-BY