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Question: DNA microarray analysis of the patterns of mRNA abundance in different human cell types shows that the level of expression of almost every active gene is different. The patterns of mRNA abundance are so characteristic of cell type that they can be used to determine the tissue of origin of cancer cells, even though the cells may have metastasized to different parts of the body. By definition, howver, cancer cells are different from their non-cancerous precursor cells. How do you suppose then that patterns of mRNA expression might be used to determine the tissue source of a human cancer?
Think about a population in which the frequency of allele A is p=0.7 and the frequency of allele a is q=0.3, and where the alleles are codominant.
In humans, mitosis generates new cells for the growth and although mutations are the ultimate source of the genetic variability.
Develop the process of transcription using dsDNA as a template to produce a final functional mRNA. In your drawing label the direction of the nucleic acids, RNA polymerase,
Several main types of animals are now extinct. A treasure trove of fossils from these unusual animals was found in the Canadian Rockies.
Describing how the brain transmits the message to muscles. Trace impulse, list the steps in as much detail as possible, from which your brain transmits the message to the suitable muscles in order to step up one step.
A microscope that gives the total magnification of 1500X, however image is too blurry to be useful. What might be the problem with this microscope.
The time-of-entry mapping method was used to determine the first five markers transferred from each Hfr during a synchronized conjugation experiment. The markers and their transfer order form each Hfr are shown below.
The resting potential of a neuron is approximately -60mV. Neurons maintain this electric potential by maintaining a balance of ions inside and outside the membrane. Which of the following is the most significant factor in determining this balance.
When mendel crossed yellow-seeded and green-seeded pea plants, all of offspring were yellow seeded. As he took these yellow-seeded plants and crossed then with green- seeded plants what genotypic ratio is expected.
The bacteria are allowed to grow overnight and are streaked on a plate using the technique that produces isolated colonies that are clones of the original. Samples of these colonies are then grown in four different media: nutrient broth plus ampicill..
The endocrime and nervous system are main regulating systems of the body. However, the nervous system has been compared to an airmail delivery system, and endocrime system to the pony express. In brief explain this comparison.
Place these steps of the insulin signaling pathway in the correct order from insultin is secreted to glucose enters the cell. Place all eight steps. The abbreviation PIP2 is used for phosphatidylinositol
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