Concept explainers
Describe the lytic and lysogenic life cycles of
Learn your wayIncludes step-by-step video
Chapter 12 Solutions
Genetic Analysis: An Integrated Approach Plus Mastering Genetics with Pearson eText -- Access Card Package (3rd Edition) (What's New in Genetics)
Additional Science Textbook Solutions
Campbell Essential Biology (7th Edition)
Campbell Biology (10th Edition)
Fundamentals of Anatomy & Physiology (11th Edition)
Brock Biology of Microorganisms (14th Edition)
Campbell Biology (11th Edition)
Human Anatomy & Physiology
- Four terms and statements related to gene regulation in bacteria are listed below. Match the correct term to each of the four statements: Regulatory molecule that binds to operator region in DNA. 1. repressor Regulatory molecule that must be present at a site in DNA (such as promoter) so that transcription occurs. 2. Constitutive 3. Effector Small molecules that bind to regulatory molecule, such as repressor. 4. Activator Phenotype of I+ oCz*arrow_forwardPlease explain how alternative gene expression is mediated by a recombination process in Salmonella? Please explain why does Salmonella use recombination-mediated alternative gene expression?arrow_forward(c) By binding one L-tryptophan molecule/monomer, the trp repressor binds to DNA to suppress syn- thesis of L-tryptophan in E. coli. Below is the amino acid sequence of the helix – (reverse) turn – helix region of the trp repressor that binds to DNA compared to the sequence of the corresponding DNA binding motif of the Prl protein, a different type of repressor protein. A diagram of the trp repressor dimer is also shown. reverse turn trp helix 4 70 Trp -Gly-Glu-Met-Ser-Gln-Arg-Glu-Leu-Lys-Asn-Glu-Leu-Gly-Ala-Gly- Ile- Prl -Ser-Glu-Glu-Ala-Lys-Glu-Glu-Leu-Ala-Lys-Lys-Cys-Gly-Ile-Thr- Val- Pri heilix trp helix 5 80 90 Trp Ala-Thr-Ile-Thr-Arg-Gly-Ser sgn-Ser-Leu-Lys-Ala-Ala- Prl Ser-Gln-Val-Ser-Asn-Trp-Phe-Gly-Asn-Lys-Arg-Ile-Arg- Prl helixarrow_forward
- Describe the important events that occur during gene transcription in bacteria. What proteins play critical roles in the three stages?arrow_forwardCertain mutations called amber in bacteria and viruses result in premature termination of polypeptide chains during translation. Many amber mutationshave been detected at different points along the gene thatcodes for a head protein in phage T4. How might this system be further investigated to demonstrate and support the concept ofcolinearity?arrow_forwardThe cI protein in bacteriophage l (lambda) is a transcriptional regulator - name the promoters in the phage genome that are regulated by this protein, and give the effect of the cI protein on each promoter you name (i.e. is the cI protein an activator or a repressor for that promoter).arrow_forward
- Illustrate how RAD51 promotes single strand invasion after releasing SPO11-linked oligonucleotides.arrow_forwardBelow is a schematic diagram showing a 3000 bp region of yeast genomic DNA. TSS 5' 3' 5' +1 (i) Draw and name specific regions in this schematic diagram that can be recognized by Transcription factor IID (TFIID). (ii) How does Transcription factor IIH (TFIIH) initiate the transcription? in inarrow_forwardAs shown a genetic switch that controls the choicebetween the lytic and lysogenic cycles of phage λ. What is agenetic switch? Compare the roles of a genetic switch and a simpleoperator site (like the one found in the lac operon) in generegulation.arrow_forward
- The bacteriophage genome consists primarily of genes encodingproteins that make up the head, collar and tail, and tail fibers When these genes are transcribed following phage infection, howare these proteins synthesized, since the phage genome lacksgenes essential to ribosome structure?arrow_forwardEukaryotes modify mRNA with an m7G cap: an N7-methylated guanosine linked via a 5′ to 5′ triphosphate linkage, and by methylation at the 2'-hydroxyl of the penultimate nucleoside. What cofactors involved in the capping reactionarrow_forwardCreate a concept map that illustrates transcription in eukaryotes by including the following terms: eukaryotic transcription, RNA polymerase I, RNA polymerase II, RNA polymerase III, transcription factors, basal transcription apparatus, regulatory promoter, core promoter, enhancer, TATA box.arrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education