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In the arabinose operon, repression is mediated by araC binding to I2, forming a loop complex that prevents RNA polyermase from transcribing the operon. Why does looping prevent transcription while it seems the promoter sequence is adjacent to the loop DNA?
In cattle, coat color may be white, black, or black and white spotted. When true breeding white cattle are crossed with true-breeding black stock, the F1 is all solid white.
I am conducting an activity assay to assess the Enzymatic Hydrolysis of 4-Nitrophenyl ?-D-Glucopyranoside by ?-D-Glucosidase. I am happy with the assay, though one of the components is bovine serum albumin ( 0.2% solution in phosphate buffer, to w..
A parallel plate flow chamber is used to measure the viscosity of an unknown fluid. With a channel height of 0.1 cm and width of 1 cm, the wall shear stress can reach 3 Pa with flow rate of 8 cm3/s.
Explain the epidemiological attributes of this episode. In which special circumstances can cross-sectional surveys be utilized to test the hypotheses? In your answer explain briefly the characteristics of the cross-sectional study.
Trace a route of air from the nares to an alveolus. Name subdivisions of organs where applicable, and discriminate between conducting and respiratory zone structures. how large a force does she exert on the sled.
Discuss how these drugs act on the receptors to prevent the typical symptoms of allergic rhinitis.
Breakthrough in cancer detection or too much potential for false positives and For this question need your thought and concerns or if you have comments with referenced.
What color do you guess that the fur of these mice will be? Why with reason?
Discuss how to figure out a cDNA sequence from an amino acid sequence? This is usually in context of determining an appropriate oligonucleotide probe.
A patient in your care has a total body water volume of 42 Liters, a hematocrit of 40 percent an extra celllular fluid volume of thirteen liters and a plasma osmolarity of 300 mOsm/ liter.
For a given reaction, G = -4 kcal/mole and the energy of activation for the uncatalyzed reaction = 5 kcal/mole. You add an enzyme, after which the activation energy decreased to 3 kcal/mole.
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.
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