1. what are the three main steps of a solid phase DNA extraction? Answer is Lysis, but does not include precipitation and purification
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1. what are the three main steps of a solid phase DNA extraction?
Answer is Lysis, but does not include precipitation and purification
2. ) Most STR fragments used in human forensic analysis are composed of _____ repeats.
Step by step
Solved in 2 steps
- Which of the following is the correct order in extracting the DNA? I. Washing of DNA II. Tissue homogenization and cell lysis III. Drying of pellet and dissolution of dried pellet IV. Precipitation of DNA from the aqueous phase V. Denaturation and separation of other biomolecules from DNA1. Why do we need to check the isolated DNA for its quantity and quality? 2. The purity of DNA sample is below 1.8 A260/A280 so, where did the proteincontamination come from? Note: Cite the in-text citation and references1. Upon the banana DNA extraction, what do you see in the top portion of the liquid when you look at your container? 2. Is the DNA you extracted pure? What are the possible impurities? 3. What can we do with the DNA once we have purified it? Discuss different techniques and technologies associated with this.
- 1. a) A technologist has a 20µl sample of DNA and adds 5µl of loading dye before adding the total volume into an agarose gel. What was the original concentration of the loading dye? a. 4x b. 5x c. 6x d. 7x e. None of the above 1. b)A technologist adds 6uL of 5x loading dye to a DNA sample before adding the total volume into the agarose gel. How much DNA sample was combined with the loading dye? 12uL 16uL 20uL 24uL 28uLAn individuals set of unique _______ can be used in DNA profiling. a. DNA sequences b. short tandem repeats c. SNPs d. all of the aboveMatch the method with the appropriate enzyme. _____ PCR a. Taq polymerase _____ cutting DNA b. DNA ligase _____ cDNA synthesis c. reverse transcriptase _____ DNA sequencing d. restriction enzyme _____ pasting DNA e. DNA polymerase (not Taq)
- When Griffith injected mice with a combination of live rough-strain and heat-killed smooth-strain pneumococci, he discovered that (a) the mice were unharmed (b) the dead mice contained living rough-strain bacteria (c) the dead mice contained living smooth-strain bacteria (d) DNA had been transferred from the smooth-strain bacteria to the mice (e) DNA had been transferred from the rough-strain bacteria to the smooth-strain bacteria1. How does PFGE separate larger fragments more efficiently than standard electrophoresis? 2. Why is SYBR green less toxic than EtBr? 3. What are the similarities and differences between Manual and Automated Sanger Sequencing? 4. What is the relationship between DNA fragment length and the distance it will run in a gel? (Restriction Enzyme Digestion)The current state-of-the-art in forensic DNA profiling involves the PCR-amplification and analysis ofshort tandem repeats, STRs, in the human genome. This approach has many distinct advantages.Please list and explain three of those advantages.
- Consider the four extraction/purification methods . a. Which extraction method would you use for a touch DNA sample? Explain your reasoning.b. Which extraction method would you use for a sample containing a mixture of primarily non-human and some human DNA? INFO: the 4 extraction methods are QIAamp manual extraction, QIAcube semi-automated extraction, DNA IQ extraction, or FTA punch purificationYou have two sewage samples that you want to check for the SARS Cov 2 viral load. Whichvariable would give you a good estimate?a. High Ct valueb. Low Ct valuec. High melting temperatured. Low melting temperaturee. None of the above The DNA fragments generated during a cycle sequencing reaction are separated by sizes usingcapillary gel electrophoresis. The determination of the actual sequence is based on detection ofa. fluorescently labelled ddNTPsb. the lengths of the fragmentsc. fluorescently labelled probesd. fluorescently labelled primers.1) What happened to the DNA at the different temperatures? How does Polymerase Chain Reaction exploit this property of DNA (Word count: 200) 2) Briefly outline the steps of DNA extraction as carried out in a lab for the purposes of sequencing, with reference to a published protocol from a company that supplies regents and kits for DNA extraction (e.g Qiagen, ThermoFischer, Invitrogen, or similar). Please Include the weblink for the published protocol you used as a reference
