Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Question
Chapter 21, Problem 7IQ
a.
Summary Introduction
To explain: The two ways by which exon shuffling occurs.
Introduction: Eukaryotic genes usually consists of two regions namely exons and introns. Exons are the coding sequences while introns do not code for any amino acid and are known as non-coding sequences.
b.
Summary Introduction
To explain: The benefit of exon shuffling and duplication.
Introduction: Transcription involves the whole genome including coding sequence (exons) and non-coding sequence (introns) but during translation, introns are spliced so that all the exons are joined together to produce target protein.
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. Explain why a long open reading frame suggests theexistence of a protein-coding exon
Chapter 21 Solutions
Study Guide for Campbell Biology
Ch. 21 - In what ways would third-generation sequencing be...Ch. 21 - Prob. 2IQCh. 21 - Refer to the organisms listed in Table 21.1 in...Ch. 21 - Explain why retrotransposons always move by the...Ch. 21 - For each of the following types of DNA sequences...Ch. 21 - Prob. 6IQCh. 21 - Prob. 7IQCh. 21 - If all Hox genes contain the same or very similar...Ch. 21 - About 25% of the human genome relates to the...Ch. 21 - Prob. 2SYK
Ch. 21 - Which of the following has decreased the time and...Ch. 21 - Prob. 2TYKCh. 21 - In the process called gene annotation, computer...Ch. 21 - Prob. 4TYKCh. 21 - Prob. 5TYKCh. 21 - Prob. 6TYKCh. 21 - What is a pseudogene? a. a gene that has been...Ch. 21 - Prob. 8TYKCh. 21 - Which of the following is common to both...Ch. 21 - Prob. 10TYKCh. 21 - Prob. 11TYKCh. 21 - Prob. 12TYKCh. 21 - Prob. 13TYKCh. 21 - Prob. 14TYKCh. 21 - Compared to genes in mice and chimpanzees, most...
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- What is EcoRI? How does EcoRI differ from an exonuclease?arrow_forwardIntrons in protein-coding genes of some eukaryotes are rarely shorter than 65 nucleotides long. What might be a rationale for this limitation?arrow_forward. a. What are all the transversions that can be made starting with the codon CGG?b. Which of these transversions will be missense? Canyou be sure?arrow_forward
- Why are some transposons medically important?arrow_forwardWhat are transposable elements? Explain the mechanism by which they move from one location to another in the genome.arrow_forwardIntrons in eukaryotic protein-coding genes may be quite large, but almost none are smaller than about 65 bp. What is the reason for this minimum intron size?arrow_forward
- Consider the tryptophan codon 5′ - UGG - 3′ in the standard genetic code . Can a single base change in this codon create a synonymous mutation? Can a single base change in this codon create a nonsense codon?arrow_forwardWhat is a transposon? Explain why the insertion of a transposon into the DNA of a cell can lead to a mutationarrow_forwardGeneticists have found that when they cut out a eukaryotic gene from genomic DNA that they can hybridize one of the strands of that gene to the mRNA for that gene by allowing the strands to hydrogen bond. Why is it sometimes claimed that alternative splicing of exons from a single gene results in a set of proteins of related function?arrow_forward
- In studying the mechanism of a particular enzyme, for which the cloned gene is available, you wish to change a putative active site histidine residue to a proline by site-directed mutagenesis. The His codon to be changed is 5′-CAC. You wish to change it to 5′-CCC, one of four Pro codons. The nucleotide sequence surrounding the His codon is 5′-CTGGAATCTCACTTTATCTGG-3′. Write the nucleotide sequence of an oligonucleotide (a 21-mer) that could force the conversion of the CAC codon to CCC in a site-directed mutagenesis operationarrow_forwardExplain why a long open reading frame would suggest the existence of a protein-coding exon?arrow_forwardConsider the following wild-type and mutant sequences:Wild-type ....CTTGCAAGCGAATC....Mutant ....CTTGCTAGCGAATC....The substitution shown seems to have created a stop codon. What further information do you need to be confident that it has done so?arrow_forward
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