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Question: Two protein kinases, PK1 and PK2, work sequentially in an intracellular signaling pathway. You create cells that contain inactivating mutations in the genes that encode either PK1 or PK2 and find that these cells no longer respond to a particular extracellular signal. You also create cells containing a version of PK1 that is permanently active and find that the cells behave as though they are receiving the signal even when the signal is not present. When you introduce the permanently active version of PK1 into cells that have an inactivating mutation in PK2, you find that these cells also behave as though they are receiving the signal even when no signal is present.From these results, does PK1 activate PK2, or does PK2 activate PK1?
A drug has a molec. weight of 200. Determine how many grams would you use to make 100 ml of a solution that is isotonic? Suppose that the diluent is distilled water and that the drug does not ionize in water.
After contact with a patient spinal fluid a lab technician develop fever nausea and purple lessions on her neck and extremities. A throat culture grew gram negative diplococci. What is genus of the bacteria.
If the experimental animals in the chamber were engaged in physical activity (such as running in a wheel), how do you think this would change results of the metabolism experiment. What changes would you expect to see in the fluid levels of manometer.
List all probable points at which caffeine may be exerting its effect. Caffeine is known to alter the transmembrane movement of calcium. What is (are) the possible site(s) at which caffeine is acting.
Metric Conversions using Dimensional Analysis the key to using dimensional analysis is the right use of conversion factors what is a conversion factor.
They isolated bacterium in a pure culture and demonstrated that experimental healthy animals injected with this culture became sick. What other test do researchers require to perform to be absolutely sure that the bacterium is responsible for the dis..
What is the phenotypic ratio for the F2 generation? Demonstrate the work, including your key. what are Harry and Sally's blood types? Show your work. What if blood typing exposed Harry had type O blood.
Complete a chart by identifying six actions that reduce the risk of infection and strengthen the body's immune system. In the second column, explain how the action reduces risk of infection and strengthens the body's immune system.
Why were there complaints then about night-blindness, bone demineralization, and blood-clotting problems. If they have a large family, in what ways have to the colorblindness trait affect their children.
Propane boils at -46oC. Propanol boils at 97oC. The difference is attributable to, Determine which of the following pairs of functional groups CANNOT react with each other by a dehydration reaction?
Which solute(s) were able to pass through 20 MWCO membrane? In accordance with your results, which solute had the highest molecular weight?
Which pair will have been likely to agree that strata such as those depicted here were deposited gradually over long periods of time by subtle mechanisms that are still at work?
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