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Jeopardy

Jeopardy. PCR is possible due to the discovery and use of thermostable polymerases. Why was this crucial to the PCR process?. The steps of PCR run at much higher temperatures than occur in most living organisms. Why do forensic labs analyze non-coding DNA and not coding areas of a chromosome?.

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Jeopardy

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  1. Jeopardy

  2. PCR is possible due to the discovery and use of thermostable polymerases. Why was this crucial to the PCR process? The steps of PCR run at much higher temperatures than occur in most living organisms

  3. Why do forensic labs analyze non-coding DNA and not coding areas of a chromosome? Non coding areas can accumulate mutations that do not negatively affect organisms?

  4. What are dNTPs? Free nucleotides, sources of A, T, G, and C in a PCR reaction

  5. Hybridization of a primer with its complement on the template…. Give term Annealing

  6. Replication of DNA many times… give term Extension

  7. Toward which pole (positive or negative) does DNA migrate when electric current is run through the gel? Why? Positive, because DNA is negatively charged

  8. Give three uses for DNA analysis Forensic fingerprinting Paternity testing Evolutionary relationships

  9. Give one drawback of RLFP analysis Requires a large sample

  10. Lt. Russ is investigating a murder scene. The felon was scratched by his victim & some of his skin cells were found under the victim’s fingernails. A DNA test was performed. Which of the suspects is the murderer? Suspect 2

  11. Mr. & Mrs. Jones just gave birth to fraternal twins- Bob and Jane. Unfortunately, the nurse has confused the Jones twins with 4 other babies. The doctors took samples of DNA from each of the babies and Mr. & Mrs. Jones. Which of the 6 children are Mr. & Mrs. Jones twins? What is 1 & 5?

  12. What would happen during electrophoresis if the gel concentration was too low for a specific sample. Samples would run off or not separate because the holes in the matrix would be too large.

  13. How many amplified loci are used to establish a unique DNA fingerprint for suspects in a crime ? 13

  14. What would happen if you ran the gel electrophoresis without first using SDS on the protein when separating proteins? The proteins would have different charges and not separate by size correctly?

  15. The number of amplified pieces of DNA equals _______ after 7 cycles of PCR 128

  16. What is isoelectric focusing? Separation of proteins by creating stable pH gradients in a gel and using the variabilty of protein charges as separation criteria?

  17. What cellular structures must be broken down to release the DNA from a cell? The cell and nuclear membranes must be broken to release the template DNA into the solution.

  18. What kind of controls are run in the PV92 experiment? Why are they important? Could others be used? The controls that are run in this experiment are the homozygous +/+, homozygous –/–, and heterozygous +/– known samples. These bands have known base-pair lengths and can be used in comparison to unknown student samples.

  19. This shows a class run of PV92, What is in lane 2, 3, and 4 Standards, two homozygous and one heterozygous

  20. This shows a class run of PV92, how many students are heterozygous? 6 - #’s 6,10,13,18,19,&20

  21. What is the difference between an allele and a locus? Locus is location on chromosome Allele is the version of gene present on that locus

  22. What kinds of changes to chromosomes would cause a "polymorphism" to appear in the DNA profiles of different individuals from a population? A mutation or rearrangement could cause a primer site to be lost, causing a band to disappear. An insertion or a deletion between primer sites would cause the band to migrate a shorter or longer distance, respectively.

  23. In the pGLO lab the source of the fluorescent gene of interest is? Jellyfish

  24. What compound is required in an agar plate to make the transformed bacteria glow? Arabinose

  25. Why does the plasmid have to be inserted into a cell to make the glow? It is the protein that glows and only cells with the “glow” instructions can pass them on to ribosomes that make proteins!

  26. Inserting a new gene into an organism is called________. Transformation

  27. Why don’t bacteria destroy their own DNA with their restriction enzymes? Methylation!!

  28. In the pGLO lab what 3 methods or materials are used to increase transformation efficiency? Heat Shock Cold Shock Salts

  29. To visualize DNA fragments after electrophoresis you must then…. Stain the gel with an appropriate stain like Fast Blue

  30. Why do you run molecular weight standards in one lane during electrophoresis? To determine the relative sizes of the DNA sample

  31. How many more days of school are left ? …… It depends on who is counting and when you play this Jeopardy game ……..

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