Q: Q.4. What is an operon? Explain an inducible operon.
A: An operon is a functional unit of DNA that contains a cluster of genes that are all controlled by a…
Q: Six strains of E. coli (mutants 1–6) that had one of thefollowing mutations (i–vi) affecting the lac…
A: In an experiment, six strains of E. coli named as mutants 1-6 have the presence of the mutations…
Q: 5g. A mutation has occurred rendering the regulatory protein unable to recognize the operator…
A: Operons are groups of genes involved in regulating a process and are transcribed as a single mRNA.…
Q: 26) If there is no lactose present in the cell of a bacterium with a "lac operon" the repressor…
A: Operon system is an example of prokaryotic gene regulation in which the expression of polycystonic…
Q: Explain how the lac operon normally functions
A: Lac operon is a group of genes with a single promotor (gets transcribed as single mRNA). These genes…
Q: Choose correct option and do explain plz. 1. The protein complex that helps RNA polymerase to…
A: a) SWI/SNF It is composed of various proteins and act as an ATP-dependent chromatin remodeling…
Q: onsider a mutant of E. coli that has an inactivating mutation in the gene for the catabolite…
A: Catabolite activator protein (CAP) This protein senses the presence of glucose. It stimulates the…
Q: 13. Choose/mark the correct word to complete the statement. Consider the regulation of CAMP and the…
A: Operon is the segment of DNA which contains regulatory gene, promoter gene, operator gene and…
Q: The main function of t-RNA isa) Proof readingb) Inhibits protein synthesisc) Identifies amino acids…
A: Transfer RNA, also known as soluble RNA is an adapter molecule that is composed of 76 to 90…
Q: I compared how the Lac operon operates like a car's gas pedal and brakes. Describe this comparison…
A: The lac deoxyribonucleic acid of E. coli contains genes concerned with lactose metabolism. It's…
Q: Caloric restriction activates what and enhances what? Mammalian genomes are forecasted to…
A: The human genome is a complete set of nucleic acid sequences for humans, encoded as DNA within the…
Q: repressible and an inducible operon
A: Operon: An operon is a functioning unit of genomic DNA containing a cluster of genes under the…
Q: The presence of lactose in E.coli triggers the transcription of Lactose Operon. O True O False
A: Operons can be defined as the gene regulatory system present in a prokaryotic organism. Operons…
Q: Matching type. Match column A with column B. Your answer in column B should be matched with column…
A: Molecular biology has become the most recent tool added to the study of genetics. It provides…
Q: Lactose operon and how does the system work
A: The functional unit of DNA (deoxyribonucleic acid) containing multiple genes, which are regulated…
Q: his is a biochemistry question: How do you expect the ability of sleep to bind glucuronolactone…
A: Glucuronolactone. This is a naturally occurring substance produced in small amounts within the body.…
Q: The mechanism by which lactose controls the lac of A) O Catabolite repression B) O DNA polymerase C)…
A: Operons are studied to understand the regulation of gene expression. It is studied under the domain…
Q: 1. Predict the effect of each situation on the Lac or Trp operon. Lac operon is ON Lac operon is OFF…
A: Operon is the group of genes that are expressed under the same regulatory sequences.
Q: 2. You are studying the regulation of the lactose operon in Escherichia coli, by measuring…
A: The lac operon is responsible for the entry and metabolism of lactose in E. coli as well as most…
Q: Think about components/interactions of lac operon during conditions of: - glucose, + lactose…
A: In the presence of easily metabolisable sugars like glucose, the bacteria first utilizes the simple…
Q: e: 5 factor that does not dissociate from the RNA polymerase Holoenzyme in: (a) What is the process…
A: Sigma factors are responsible for determining the specificity of promoter of the DNA.
Q: You now add tryptophan to the cell. What would happen to the bacterial cell and its trp operon?
A: Gene regulation is the process in which the DNA which contains information is transcribed into the…
Q: -Discuss how the presence of glucose impacts the expression of the ara operon.
A: Introduction: The L-arabinose operon, which is called the ara or araBAD operon, for the breakdown of…
Q: nber that hexose kinase is an enzyme required for hexose metabolism, a process that takes a on sugar…
A: Operon is a regulatory unit in certain bacteria that helps in the regulation of the gene expression…
Q: The promoter of an operon is the site to which RNApolymerase binds to begin transcription. Certain…
A: The promoter region present in the operon mainly consists of a binding site for RNA polymerase in…
Q: What is the difference between a repressible and an inducible operon?
A: Given: To find the difference between repressible operon and inducible operon.
Q: 60) In case of human circovirus, in order to reduce mRNA for theit.D heel iD use two viral enzymies,…
A: *NOTE: Kindly repost for other questions Dear Student as per the guidelines we are supposed to…
Q: True/false? if false, justify briefly Bacterial operons gather open-reading-frames that are coupled…
A: An operon is a group of few genes that are regulated under the same promoter and operator region.…
Q: 5d. Remembering that hexose metabolism is a highly conserved process among all branches of life, how…
A: Hexose operon should contain 10 genes.
Q: sigma factor: TFIID TBP as O Pribnow box: TATA box O RNA polymerase holoenzyme: RNA polymerase II…
A: Sigma factor is a protein essential for the initiation of transcription in bacteria.It enables…
Q: PPPP 2.7 essage hatentaded pruteiis? gene iS shown below (starting with ATG), What is the resulting…
A: We are authorized to answer one question at a time since you have not mentioned which question…
Q: [ Select ] H. What does the absence of glucose do to the bacterial cell v it inhibits the trp operon…
A: The term operon is associated with the genes set present in close vicinity that get regulated in a…
Q: Resection of a bacterial chromosome in which genes for the enzymes of of a particular metabolic…
A: Genetic information is inherited to generations by means of DNA. The DNA has many genes that code…
Q: Propose a mutation for Uniprotkb-P39086 and it’s effec
A: Mutations are the result of damage or alteration of a DNA such that the genetic message it conveys…
Q: plz explain with thorough explanation
A: Lac Operon ( Lactose operon) found in Bacteria and E.coli and utilize lactose metabolism, works…
Q: Supply the Wuras in the blanks below: In an inducible operon, transcription is normally and must be…
A: An operon is a group of multiple genes that are transcribed together to give the out come of a…
Q: Matching type Choices are in the picture 11. regulating elements in the operon 12. ribosome…
A: Transcription is the process by which the information in a strand of DNA is copied into a new…
Q: 32. Operons are the basic units by which transcriptional regulation occurs in prokaryotes. Using…
A: Genes coding for functionally related proteins are concentrated throughout the DNA of bacteria and…
Q: 9. A single base substitution mutation in lacY gene of the Lac operon would render the entire lac…
A: Gene regulation at the level of transcription in bacteria is achieved by the operon model. Operon is…
Q: In class, I compared how the Lac operon operates like a car's gas pedal and brakes. Describe this…
A: Lac operon is needed by the bacteria for the transport and metabolism of lactose.It is only…
Q: The lac operon produces: (choose the best answer) O A single mRNA molecule O A single protein O A…
A: Transcription: It is the process through which the enzyme RNA Polymerase transfers information from…
Q: The trp operon vs. the lac operon: Which one of these is activated in the presence of a substance,…
A: An operon consists of a cluster of functionally related genes that are under the regulation of a…
Q: 23. The mmm operon, which has sequences A, B, C, and D (which may be structural genes or regulatory…
A: An operon is a cluster of genes transcribed together to provide a single molecule of messenger RNA (…
Q: Think about components/interactions of lac operon during conditions of: + glucose, - lactose…
A: The lac operon consists of three structural genes, a promoter, a terminator, regulator, and an…
Q: Repressor Inducer Riboswitch
A: A concept map is a diagram that shows the relationship between various concepts. Most concept maps…
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- Primary efecd al Increase the offmity of R NA pelymerase buding to a promrter, b) facilitate recombiraton doning ) Rovide prostectio.. agamst mtogratrien of lysogamic dl Generate of transposens? me iesis, ViYUses - mututions and chromosomal rearrargenments. el Conduct ONA reglication proofreadng àl Antibotics to freat infectons caused by facu Hontive bactenia athactve anaerabic homans, the teryets which would in be most shibiters of bacteriai are a) electon transgort. bl MRNA splicng ) hansciphion dl poly -A addion for MRNAS- e Nine of the abouer ) Which is a cheractenstic of eu Korgetic peten syntheni> polycistremic acid tans lated is formyl-methionme. a) {ukuryotic mRNA is bl The frst amino c) 'The MRNA most be polyadenglated atthe 3l end before trenslahion dl Er Karystia transcnphion e) Tansemphion and tenslation reguires single RNA polymenm Bccure duay as t t ig) If the alkle cousing sickle cell i> present at a amemia fres wancy of o.05 certain lorge, rendomly-mating in…Qy: d whicel folowing Sucturs reprasent Perfeet orl trap? why? One TheAt any given time, intestinal crypts of mice com-prise about 15 stem cells and 10 Paneth cells. After celldivision, which occurs about once a day, the daughtercells remain stem cells only if they maintain contact with aPaneth cell. This constant competition for Paneth-cell con-tact raises the possibility that crypts might become mono-clonal over time; that is, the crypt cells at one point in timemight derive from only 1 of the 15 stem cells that existedat some earlier time. To test this possibility, you use theso-called confetti marker that upon activation expressesany one of three fluorescent proteins in the stem cells ofthe crypt. You then examine crypts at various times todetermine whether they contain cells with multiple colorsor only one color (Figure Q22–1). Do the crypts becomemonoclonal over time or not? How can you tell?
- Gone X is responsible for cell poiteratian and when gene x is expressed, me cells divide e and go through Xhe henmau ceu cycie Wren is not present, proliferanan ends. a) what is oa dominant mutanon that can occur in have a dominant effect on celu proliferation? And wnere in genex waud me mutaion occur li.e.pomoter? ete) gene X gene x not uould b) what is a recessive mutation that can occur in ingene X that would have recessiue effect on prouperation and where in genex would the mutanon occur?ocument/d/1J-wo90GpYsd_jQSUBtDQHWisqGvSOteUQYoXaXazyS0/edit uction to cell.. R 1 Summary of Philo... E Petrona Andres Mig.. 2 Translations IXL: Par... IXL - Translations: g.. 1 IXL- meostasis Lab Exercise Tools Add-ons Help Last edit was 2 days ago text Calibri 12 BIU Conclusion: 1. List the changes you observed in the body color and perspiration level in response to? 2. Explain how the changes help the body adjust to maintain equilibrium (homeostasis)? 3. Speculate why a change in body temperature occurs? 4. Name which mechanisms your body uses to maintain a constant body temperature? 5. Explain why an increased breathing rate accompanies exercise? 6. Explain why an increased heart rate accompanies exercise? 7. Write a paragraph about the conclusions you can draw about your body's ability to maintain equilibrium (homeostasis). Be sure to include the answers to the questions above.What's the difference betwwen complementary interaction and suppression epistasis?
- why wxactly 20Atp not 24?Enhanced Spatial Learning in Mice With an Autism Mutation Autism is a neurobiological disorder with symptoms that include impaired social interactions and stereotyped patterns of behavior. Around 10 percent of autistic people have an extraordinary skill or talent such as greatly enhanced memory. Mutations in neuroligin 3, an adhesion protein that connects brain cells to one another, have been associated with autism. One mutation changes amino acid 451 from arginine to cysteine. In 2007, Katsuhiko Tabuchi and his colleagues genetically modified mice to carry the same arginine-to-cysteine substitution in their neuroligin 3. Mice with the mutation had impaired social behavior. To test spatial learning ability, the mice were placed in a water maze: a deep pool of warm water in which a platform is submerged a few millimeters below the surface. The platform is not visible to swimming mice. Mice do not particularly enjoy swimming, so they locate a hidden platform as fast as they can. When tested again, they can remember its location by checking visual cues around the edge of the pool. How quickly they remember the platforms location is a measure of spatial learning ability (FIGURE 15.18). FIGURE 15.18 spatial learning ability in mica mutation in neuroligin 3 (R451C), compared with unmodified (wild-type) mica. 1. In the first, how many days did it take unmodified mice to learn to find the location of the hidden platform within 10 seconds?For many years it was a complete mystery howcytotoxic T cells could see a viral protein that seemed to bepresent only in the nucleus of the virus-infected cell. Theanswer was revealed in a classic paper that took advan-tage of a clone of T cells whose T cell receptor was directedagainst an antigen assoicated with the nuclear protein ofthe 1968 strain of influenza virus. The authors of the paperfound that when they incubated high concentrations ofcertain peptides derived from the viral nuclear protein, thecells became sensitive to lysis by subsequent incubationwith the cytotoxic T cells. Using various peptides from the1968 strain and the 1934 strain (with which the cytotoxic Tcells did not react), the authors defined the particular pep-tide responsible for the T cell response (Figure Q24–1).A. Which part of the viral protein gives rise to thepeptide that is recognized by the clone of cytotoxic T cells? Why do not all viral peptides sensitize the target cells forlysis by the cytotoxic T…
- Bacteriophage-Inspired Antibiotics Although bacteriophages have been infecting bacteria for billions of years, no mechanism, has evolved in bacteria to prevent the viruses from lysing the cell walls of their hosts. Now, scientists are targeting the same bacterial wall components that bacteriophages do. The goal is to develop antibiotics that bacteria will be less likely to develop resistance to. FIGURE 20.22 shows the results of a study to test Epimerox, a new bacteriophage-inspired antibiotic, against Bacillus anthracis, the bacterial species that causes the disease anthrax. FIGURE 20.22 Effect of Epimerox on the survival of mice with anthrax. Mice were infected with the bacteria B. anthracis. One group of 15 then began receiving a drug-free buffer solution 3 hours later. Another 15 were treated with Epimerox beginning 3 hours after infection. A third group of 15was treated with Epimerox beginning 24 hours after infection. In studies with Bacillus anthracis cells grown in culture, no Epimerox-resistant cells were observed. Explain why this result is consistent with the scientists' goal for developing this drug.Bacteriophage-Inspired Antibiotics Although bacteriophages have been infecting bacteria for billions of years, no mechanism, has evolved in bacteria to prevent the viruses from lysing the cell walls of their hosts. Now, scientists are targeting the same bacterial wall components that bacteriophages do. The goal is to develop antibiotics that bacteria will be less likely to develop resistance to. FIGURE 20.22 shows the results of a study to test Epimerox, a new bacteriophage-inspired antibiotic, against Bacillus anthracis, the bacterial species that causes the disease anthrax. FIGURE 20.22 Effect of Epimerox on the survival of mice with anthrax. Mice were infected with the bacteria B. anthracis. One group of 15 then began receiving a drug-free buffer solution 3 hours later. Another 15 were treated with Epimerox beginning 3 hours after infection. A third group of 15was treated with Epimerox beginning 24 hours after infection. What do these data indicate regarding the optimal time to begin Epimerox treatment?Describe the effector system (the cell-killing mechanism) usedby Tc cells.