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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?
Suppose that the each replication fork moves at a rate of 500 base pairs per second, how long would it take to replicate the E. coli chromosome from a single origin of replication?
Jimmy, a new undergraduate researcher in the lab, is told to make a vector having a copy of the CELLBIO gene from Dr. Acosta's genome as well as a selectable gene, Ampr.
Illustrate one experiment that shows that shh is the critical molecule produced by the inducing tissue referred to in (a). what is the evidence that this tissue regulates the ventral pattern of the neural tube (even before this tissue was known to pr..
Find out the genotypes of the parents and their pups. Use Punnett Squares to demonstrate your answers. What did Mendel observe in the F2 offspring that showed him that alleles for seed shape segregate separately of those for seed colour.
Import or export of solutes (chemiosmotic work) turning the flagellar motor (mechanical work) Synthesizing ATP via the F0F1 ATPase (chemical work; discussed next lecture) how is this energy generated or replenished.
The external environment is open directly to the peritoneal cavity of the abdomen and pelvis. This is one source of pelvic inflammatory disease.
A fish on the outside of a school swims inward, leaving other fish on the edge. These new "edge" fish then move inward and the cycle repeats.
Breathing Rate increasesas Power raise. However, it is not expectedto increase linearly throughout the Power domain. Explain how BR increased as Power increased
If gametes from a gene pool combine randomly to make only a small number of zygotes, the allele frequencies among the zygotes may be different and discuss the founder effect
Assume you count the number of bacteria in 5 of the 1/400mm^2 small boxes of the central grid on the Hemocytometer.
Since a doughnut contains a large quantity of energy that can become available for our metabolism when eaten, why isn't the doughnut "jumping" all over the counter or hot to the touch.
Assume that a disease is inherited via a dominant mode of inheritance and that one of the parents is affected with the disease and the other is not.
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