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Biology homework help – Coursework Geeks

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QUESTION 11. Most scientists who use DNA microarrays obtain them  Save your time – order a paper! Get your paper written from scratch within the tight deadline. Our service is a reliable solution to all your troubles. Place an order on any task and we will take care of it. You won’t have to worry about the quality and deadlinesOrder Paper Now from companies that mass produce them  from the government  by making them in their labs  by exploiting ambitious graduate studentsQUESTION 21. “In this study, cancerous and normal skin tissue samples were excised with a scalpel. Each skin sample was then placed into a sample tube along with solvent, shaken on a vortex and centrifuged. When the sample tubes came out of the centrifuge, there was a top layer and a bottom layer. For our purposes, we went on to use ______________ for further processing.”  only the top layer  only the bottom layer  a mixture of top and bottom layers  none of the options listedQUESTION 31. The purpose of the vortex instrument is to  vigorously shake the tissue sample in the solvent so that it dissolves.  spin the tissue/solvent mixture around to separate the solids  cause the mRNA to bind to the pellets  dispose of biohazardous waste safelyQUESTION 41. “Once the RNA is isolated from the DNA, proteins and other materials, the solvent/RNA mixture is run through a column of all beads. Each bead has several short strands of polyT RNA sticking out of it. In this step:”  “mRNA sticks to the beads, while rRNA and tRNA run right through the column”  “tRNA sticks to the beads, while mRNA and rRNA run right through the column”  “rRNA and tRNA stick to the beads, while mRNA runs right through the column”  none of the options listedQUESTION 51. “Once the mRNA is isolated, you make a DNA copy of it using by adding polyT primers, labeled DNA nucleotides, and an enzyme known as:”Biology homework help.  reverse transcriptase  tyrosine hydroxylase  alcohol dehydrogenase  ATP kinaseORDER A PLAGIARISM-FREE PAPER NOWQUESTION 61. A DNA copy of a mRNA transcript is known as  complementary DNA (abbreviated cDNA)  copied DNA (abbreviated cDNA)  mitochondrial DNA (abbreviated mtDNA)  recombinant DNA (abbreviated rDNA)QUESTION 71. Each spot on the DNA microarray in embedded with  copies of DNA from one particular gene  copies of DNA from several different genes with similar functions  copies of DNA from several different genes with different functions  copies of mRNA from one or more genesQUESTION 81. “When we say that the cDNA derived from our sample has hybridized to a particular spot on the array, we mean that: ”  The cDNA from the sample has stuck to the DNA on the microarray at that point.  The cDNA from the sample is jumbled and cannot be trusted.  The cDNA has been used to make an mRNA copy  You need to buy microarrays from different manufacturers and triangulate the resultsQUESTION 91. “In this particular experiment, we used red-labeled DNA to process the sample from _____________ tissue and the green-labeled DNA to process the sample from ___________. ”  cancerous; normal  normal; cancerous  normal; normal  cancerous; cancerousQUESTION 101. “After scanning the green labeled areas and the red labeled areas, when we combine the two images, the spots that show up as yellow correspond to ”  genes expressed by both normal or cancerous skin cells.  genes that were not expressed at all in either normal or cancerous skin cells  “genes expressed by cancerous, but not normal skin cells”  “genes expressed by normal, but not cancer skin cells. ”QUESTION 111. “In interpreting the results of this study, spots on the microarray that are red correspond to:”  genes that are turned up by cancer  genes that are turned down by cancer  genes that are unaffected by cancer  genes that aren t expressed in normal or cancerous cellsQUESTION 121. “In interpreting the results of this study, spots on the the microarray that are green correspond to genes that are ”  genes that are turned down by cancer  genes that are turned up by cancer  genes that are unaffected by cancer  genes that aren t expressed in normal or cancerous cellsQUESTION 131. “When the DNA microarray study tells us that a large number of genes have been turned up (or turned down) by a disorder, the most likely explanation is that ”  the turned up genes are likely controlled by a gene that has gone bad  all of these genes are genes that have gone bad themselves  even just one mutation in any of these affected genes would have been sufficient to cause the disorder  the cytoplasm has too many free radicals in itQUESTION 141. A gene shown by the microarray to be expressed is :  “probably making protein, but a protein expression analysis would be needed to know for sure”  definitely making protein  definitely not making protein  probably making protein but there’s no way to know for sureQUESTION 151. “In the application of this technique to skin cancer, a gene that has gone bad ”  “may or may not be identified at all, but the overall pattern of results can give important clues”  can almost always be identified via DNA microarray “Our Prices Start at $11.99. As Our First Client, Use Coupon Code GET15 to claim 15% Discount This Month!!””Do you need a similar assignment done for you from scratch? We have qualified writers to help you with a guaranteed plagiarism-free A+ quality paper.

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