Exam 3CH 12-15.docx - Exam 3 Chapters 12-15 Return to...

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Exam 3- Chapters 12-15 Return to Assessment List Comment: Congratulations on the completion of Exam 3. Please let me know if you have any questions. Part 1 of 1 - 100.0 Points Question 1 of 40 2.5 Points If genes are completely linked, all the offspring will be _________. A. hybrids B. dominant C. recombinants D. parental 664307 Exam 3- Chapters
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E. recessive Feedback: Correct Question 2 of 40 2.5 Points The codon AUG specifies the amino acid methionine. What would the tRNA anitcodon be that recognizes this codon? A. UAC B. GUA C. AUG D. GCA Feedback: Correct Question 3 of 40 2.5 Points Due to a random error by the aminoacyl tRNA synthetase, a tRNAVal was misloaded with Ile. What do you predict will result?
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A. One protein will get Val inserted where Ile was supposed to go, leading to minor structural change in the protein. B. One protein will get Ile inserted where Val was supposed to go, leading to major structural changes in the protein. C. One protein will get Ile inserted where Val was supposed to go, leading to minor structural change in the protein. D. The cell’s proteins will get Ile and Val inserted in the wrong places, leading to major structural changes in the proteins. Feedback: Learning Objective: Analyze how genes determine the proteins found in all cells Question 4 of 40 2.5 Points A mutation causes a codon to change from UAC to UAU, both of which specify tyrosine. This is an example of A. a frameshift mutation
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B. missense mutation C. silent mutation D. nonsense mutation Feedback: Learning Objective: Discuss the different types of mutations in DNA Question 5 of 40 2.5 Points Nondisjunction during meiosis II will result in ________. A. n B. n-1 C. n+1
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D. n+1 and n-1 E. n,n-1 and n+1 Feedback: Correct Question 6 of 40 2.5 Points There are a number of unique features to eukaryotic pre-mRNA splicing. Select all that apply. A. Introns are thought to encode specific subunits of proteins. B. Introns likely slow down gene expression. C. Introns need to be removed precisely to prevent mutations. D. There are often multiple introns in a gene. Feedback: Learning Objective: Understand the significance of exons, introns, and splicing Question 7 of 40 2.5 Points The codon AUG specifies the amino acid methionine. What would the tRNA anitcodon be that recognizes this codon? A. UAC
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B. GUA C. AUG D. GCA Feedback: Correct Question 8 of 40 2.5 Points Frameshift mutations occur when A. bases are added or deleted B. there is an amino acid substitution C. there is a transition substitution
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D. transversion substitution Feedback: Incorrect- Learning Objective Text: Discuss the different types of mutations in DNA Question 9 of 40 2.5 Points An experiment started with 15 N 15 N DNA. After two generations in 14 N medium, E. coli will have A.
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