1. Explain the functioning and regulation of the following operons: lac, trp. 2. Explain the mechanism of transcription regulation in eukaryotes. 3. Explain what a mutation is and its importance for evolution of life. 4. Classify and characterize the main types of mutations. Please answer every question

1. Explain the functioning and regulation of the following operons: lac, trp. 2. Explain the mechanism of transcription regulation in eukaryotes. 3. Explain what a mutation is and its importance for evolution of life. 4. Classify and characterize the main types of mutations. Please answer every question

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter10: Control Of Gene Expression

Section: Chapter Questions

Problem 5SQ

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Which of the following is characteristic of genes and gene regulation in both bacteria and eukaryotes? (a) promoters (b) non-coding DNA within coding sequences (c) enhancers (d) operons (e) DNA located in a nucleus
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1. a)how is it possible for such drugs to selectively kill bacterial cells and not our own cells? b)Provide an example of post-translational regulation of protein activity and explain the advantage of regulating each protein/process at the post-translational level instead of the transcriptional level.
What is an operon ? a. A series of genes controlled by the same operator b. A series of genes on the same mRNA molecule c. A series of genes that all have the same function d. A series of genes all regulated by the same repressor
Part 1: Matching Match the term with its corresponding definition. a. Insertion e. Nonsense Mutation b. Deletion f. Missense Mutation c. Frameshift Mutation g. Germ-line Cells d. Silent Mutation h. Somatic Cells ____ 1. Remove a base or bases ____ 2. Add a base or bases ____ 3. Mutations in these cells are not passed to future generations but are passed to other body cells derived from them ____ 4. Mutation in which an amino acid is changed to a stop codon and the protein is truncated ____ 5. Mutations in these cells are passed to future generations ____ 6. Results if an insertion or deletion throws the reading frame of the gene message out of register ____ 7. Mutation where the protein does not change ____ 8. Mutation where a codon is changed resulting in another amino acid inserted in…
1. Compare and contrast repressible and inducible operons. 2. Are genes for enzymes involved in anabolic processes usually repressible or inducible , why?
1. What is the default state of the lac operon? a. LacI repressor is sitting on the operator sequence and blocks RNAP from transcribing lacZYA. b. LacI repressor is not in a correct shape to bind to the operator sequence. c. LacI repressor is not produced in the absence of lactose. d. Allolactose is sitting on the operator sequence and blocks RNAP from transcribing lacZYA.
Which of the following statements uses the term homologous correctly?A. The two X chromosomes in female mammalian cells are homologousto each other.B. The α-tubulin gene in Saccharomyces cerevisiae is homologousto the α-tubulin gene in Arabidopsis thaliana.C. The promoter of the lac operon is homologous to the promoterof the trp operon.D. The lacY genes of E. coli and K. pneumoniae are approximately60% homologous to each other.
1. a) If glucose is not available and lactose is absent from the environment, what is the status of transcription of the lac operon genes? Explain your answer from both an evolutionary perspective and in terms of negative and positive regulation of the operon? b)If glucose is not available, but lactose is available from the environment, what is the status of transcription of the lac operon genes? Explain your answer from both an evolutionary perspective and in terms of negative and positive regulation of the operon? b)
Which of the following is true about operons? A. Contains a cluster of genes transcribed as multiple mRNAs. B. Contains a cluster of genes transcribed as a single mRNA. C. They are commonly found in eukaryotes. D. Can only be regulated by gene activator proteins.
Which type of mutation would expect would have no effect on a protein coding gene in eukaryotes? a.a single base substitution that creates a splice site mutation b.a single base substitution that creates a synonymous mutation c.a single base deletion that creates a frameshift near the 3' end of the open reading frame d.a single base substitution that creates a non-conservative missense mutation e.a single base substitution that creates a conservative missense mutation