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- In Figure 6-13, explain at the protein level why this heterokaryon can grow on minimal mediumDetermine the coefficient of coincidence and the interferencepZERO®-1 is a 2808 bp cloning vector from Invitrogen. This vector allows effective selection of positive recombinants via disruption of the lethal gene, ccdB. Besides the lethal gene, it has an additional Zeocin resistance gene for tighter screening control. The Zeocin resistance gene in this vector is certainly more advantageous over ampicillin resistance gene. Give its THREE (3) advantages.
- There are currently 3 types of Covid- 19 vaccinations. What is the best Covid-19 vaccination and why?min+ = confers resistance to minocycline cep+ = confers resistance to cephalexin van+ = confers resistance to vancomycin The following table shows the results of your experiments. Transformation of the recipient cells was conducted, using the DNA of the donor cells. You next selected for recipient cells that had undergone transformation by plating the transformed cells on media containing minocycline. This enabled you to select for min+ cells. The min+ cells were then replica plated onto media containing cephalexin or vancomycin in order to determine the antibiotic resistance phenotypes with respect to these other two antibiotics Questions a) Of the three potential orders of these genes, which orders are possible and which are impossible based on your knowledge of the relative distance? b) Finally, determine the correct order of the three genes. Please include a DIAGRAM to illustrate how you deduced the correct gene order, as well as an explanation of your reasoning.Give typed explanation
- In recombination studies of the rII locus in phage T4, what is the significance of the value determined by calculating phage growth in the K12 versus the B strains of E. coli following simultaneous infection in E. coli B? Which value is always greater?The figure below represents the size of various SSRS that are used for forensic analysis. The bars corresponding to each locus represent the range of size of the various alleles of the locus. 100 bp 200 bp 300 bp D8S1179 D21S11 D7S820 CSF1PO D3S1358 TH01 D13S317 D16S539 D2S1338 D199433 VWA TPOX D18S51 FGA D5S818 III Each color in the figure represents a set of molecular markers that can be analyzed simultaneously. Which of the following pairs of markers, which are not grouped together in the figure, could be analyzed simultaneously if they were the only two markers being studied? FGA and CSF1PO 400 bp THO and VWA THO and TPOX O TOPX and FGABacteriophage P22 was used in generalized transduction experiments to infect the Salmonella typhimurium donor strains described in the table below. The resulting phage lysates were then used to infect the S. typhimurium recipient strains listed in the table. In each cross, a phenotype was selected for one of the three genetic markers studied (str, aceA, thrA), and then replicates were performed to select the corresponding recombinants for the other two markers. The results are given in the following table: Recipient strain Selected phenotype Selected recombinants Donor strain str thrA aceA+ thrA str aceA+ strs thrA+ aceA thrA+ str aceA Str Ace+ Str ThrA ThrA+ ThrA ThrA+ Ace Ace str: gene involved in streptomycin resistance, aceA gene involved in the use of acetate as a carbon source, thrA: gene involved in the biosynthesis of threonine. Number 60 40 95 5 10 90 Determine the order of the genes and draw a genetic map showing this order
- The Pfizer Covid-19 vaccine is one of the vaccines currently being rolled out for mass vaccination in South Africa to protect the population against SARS CoV-2, and the active compound in this vaccine is an mRNA molecule. a) The starting material for productio of this vaccine is a copy of the coronavirus spike protein gene cloned into a ppasmid. List the main experimental steps in the vaccine production process, to go from a plamid to an mRNA molecule. b) Which molecular processes in the cell will allow an injected strand of mRNA to produce anti-Covid immunity in the vaccine recipient?As everyone is aware of, suspected COVID-19 patients are being diagnosed using the Nasopharyngeal Swab Test through Reverse-Transcriptase Polymerase Chain Reaction. Explain its principle; its advantages and disadvantages.Stable transmission of linear yeast artificial chromosomes(YACs) requires?