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- After adding stop solution (sulphuric acid) in reaction mixture of HRP assay with TMB, yellow color becomes brighter. What is the mechanism?With detail, compare and contrast the following 5 real-time assays; Taqman, SYBR Green, Molecular Beacon, FRET, and Scorpion. Please write complete sentences in paragraph form. Identify how the assays are similar but more importantly, what are the distinguishing features of each of the technologies.what are some advantages to using latex particles instead of blood cells for IM assay?
- Considering counting rules, calculate the initial titre of the sample viral stock if the following plaques were counted in a plaque assay. Show clear sample calculations. Table 1: Plaque assay counts for lambda phage stock titre enumeration of average concentration (PFU/mL) Total dilution of viral stock 1/13500000 1/135000000 1/135000000 plated Volume diluted viral stock 0.1 0.1 0.1 plated (mL) PFU replicate 1 TNTC 275 25 Calculated concentration (PFU/mL) replicate 1 PFU replicate 2 TNTC 239 23 Calculated concentration (PFU/mL) replicate 2 Average concentration (PFU/mL)Explain: Describe an electrochemical sensor assay method for rapid bacterial detection and identification. What are the principles and mechanisms involved? functionalization of a sensor array with DNA oligonucleotide capture probes for ribosomal RNA (rRNA) species-specific sequences. sandwich hybridization of target rRNA with the capture probe and a horseradish peroxidase linked DNA oligonucleotide detector probe. Explain how bacteria are being detected using an electrochemical sensorPlease describe the ChlP assay. Why it is used? Please give examples Cells Lysis Cross-linking Antibody binding Immunoprecipitation Crosslink reversal Wash steps DNA and protein analysis DNA purification and quantitative PCR
- How does a rapid test detecting RSV work and what kind of binding does it use (competitve, sandwich, indirect)? Explain using anti-rsv antibody conjugated with gold nanoparticle, anti-rsv antibody, and anti-human IgG. Draw a diagram if possible.Shown below is a set of cell culture plates for a plaque assay. The assay was performed by preparing dilutions of a virus stock with the dilution factor for each prepared dilution listed below the sample. 0.5 mls of each dilution was added to confluent (fully covered) monolayers of cells on each plate. The virus used for the assay had a titer of 2 x 1010 Plaque forming units (PFU) per ml. Only 1 set of the above plates would have a number of plaques on it that would be both easy to count and high enough to be statistically relevant. Which dilution set would it be and about how many plaques would there be on the plates of that dilution set.1.a)What is the equivalence point and how does it relate to the recommended proportion of serum to blood in the heme agglutination assay? b. what would the predicted outcome be if you used too little serum in this assay? Why? c. what would the predicted outcome be if you used too much serum in assay? Why?
- Fluorescence in-situ hybridisation (FISH) analysis can be performed on fixed pathological tumour sections. Briefly outline why interphase FISH is used on fixed material from a solid tumour, rather than metaphase FISHDescribe how Blue/White screening reagent helps in screening the colonies of transformed cells.What are the different categories of cell viability assays? Describe one of them briefly. Define the role (aim of use) of Trypan blue dye in cell culture studies.