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One of the most controversial moral and ethical dilemmas of the President George W. Bush's campaign to be re-elected focused on stem cells. Stem cells have the ability to become or differentiate into any type of cell. If you had the power to become a stem cell and have unlimited control of what you could become (real or imagined) what would your cell do? Compare your cell to two normal cells in the body. What do they do alike? What do they do differently?
Consider an atom of nitrogen (N), which is more electronegative than an atom of hydrogen (H). N has 5 valence electrons, whereas H only has 1 (H can only form 1 total pair of electrons in it's valence shell) ... Given this information: If an atom ..
Cephalochordates and placental mammals both have microlecithal eggs, yet mammalian early development resembles that of birds more than that of amphioxus.
a.Draw all ionization equilibria for the amino acid cysteine. Label each with the correct pka. b.Calculate the net charge on each structure. c. draw the titration curve d. Calculate the pI.
You want to make an antibody against a C. elegans nematode protein that the DNA shown in Figure A encodes. To do this, you will clone the coding sequence into a bacterial expression plasmid, overexpress the protein, purify it, and inject it into a mo..
What are the two major classes into which fishes are divided and from which features do osteichthyes and condrichthyes get these names?
Your colleague also collected plants from higher up Kinport Peak, where situations are harsher. You again genotype a sampling of sego lilies, finding 125 DD, 55 Dd, 20 dd.
Explain why the increased prevalence of sickle cell disease among African Americans actually has more to do with the environment than skin color or other phenotypes used to define races.
A business wants to share its customer account database with its trading partners and customers, while at the same time providing prospective buyers with access to marketing materials on its Web site.
select one of the special senses to discuss. how does that sense allow us to interact with and be aware of the
In an experimental situation, a student researcher inserts an mRNA molecule into the cytoplasm of a eukaryotic cell after she has removed its 5' cap and poly-A tail.
The Km of an enzyme: Vmax:
ELISA uses an enzyme-linked antibody to detect and antigen. Briefly explain how use of the enzyme is ELISA could amplify the detection of a very small amount of antigen in a sample.
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