Which of these extracellular signal molecules could diffuse through a plasma membrane and bind to an intracellular receptor?
-cellulose
-glycerol
-starch
-glucose
-estrogen
estrogen
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Examine Figure 41.1c. Which of the following best describes conditions at equilibrium?
A. No water molecules are moving across the barrier between the two compartments. B. A net movement of water molecules continues to add water to the right-hand compartment. C. A net movement of water molecules begins to add water to the left-hand compartment. D. Water molecules move randomly across the barrier with no net addition of water to either side. E. None of these choices accurately describe conditions at equilibrium.
Which organisms are not found in the crust of the desert soil? a. Fungi b. Lichens c. All are found in the crust
d. Mosses e. Cyanobacteria
The heartworms that can accumulate within the hearts of dogs and other mammals have a pseudocoelom, an alimentary canal, and an outer covering that is occasionally shed. To which phylum does the heartworm belong?
A) Platyhelminthes B) Arthropoda C) Nematoda D) Annelida
Chromatography is frequently used to purify proteins from cellular extracts. There are various strategies that can be used, depending on the tools and reagents available
You are interested in isolating additional proteins that interact with your protein target, but your labmates have used all the purified protein stocks. A. Why would you need purified target protein to do this experiment? B. What other strategies/tools could you use to carry out the affinity chromatography? C. What are the limitations to the method you described in part B that would not be a concern if you could use the purified protein directly?