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If a band (from electrophoresis) is present at the same place (same migration distance) in samples from different species, is it necessarily from the same protein? yes/no? Why?
What are the two major hypotheses for the evolutionary history of introns in prokaryotes and eukaryotes? What is the evidence supporting each of these possibilities? What kind of additional evidence, if available, could help resolve this debate.
Compute the change in energy of an atom that emits a photon of wavelength 2.21 meters. (Planck's constant is 6.626 x 10-34 joule seconds; the speed of light is 2.998 x 108 m/s)
A person eating a contaminated shellfish can lose the ability to breathe within minutes, but may be rescued if placed on a ventillator for a period of days.
As the aroma of freshly brewed coffee drifted by a sleeping student's nose, his mouth began to water and his stomach began to rumble. Explain his reactions in terms of ANS activity.
How various ATP equivalents are required to synthesize de novo one molecule of IMP, starting from ribose-5-phosphate? Presume that all required precursors in the pathway are present.
During the process of meiosis in the female (oogenesis), two meiotic divisions occur. This leads to the formation of the ovum, and three polar bodies. These divisions involve an unequal division of the cytoplasm.
Explain how phosphate limiting conditions for photosynthesis.
Discuss how these drugs act on the receptors to prevent the typical symptoms of allergic rhinitis.
In guinea pigs, white coat is recessive to black coat avy hair is recessive to straight hair. A breeder crosses a female guinea pig that is homozygous for white coat.
A quorum sensing response in a hypothetical organism results in upregulation of one gene and downregulation of another. Suppose that preliminary experiments have been performed and these experiments have shown that homoserine lactone functions as the..
Name the non-memory B & T cells produced by the body. Discuss the interactions and origins of the different types of T cells and B cells and the role of "recognition." Describe the interplay of these cells in a specific immune response.
The Carboniferous swamps were dominated through several extinct relatives of seedless vascular plants. Surviving taxa of these groups are rather small in size compared to their gigantic relatives.
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