Which of the following statements is false with regard to G-protein coupled receptors (GPCRs)?
A) GPCRs can interact with specific receptor interacting proteins to modify ligand affinity.
B) Adenylate cyclase is activated.
C) Phosphodiesterase creates v cAMP molecules in response to moderate cAMP levels.
D) Protein Kinase A is activated by cAMP.
E) cAMP signals for its own degradation indirectly.
C) Phosphodiesterase creates v cAMP molecules in response to moderate cAMP levels.
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Phylogenetic trees are usually constructed using either a distance-based ________ approach, or a characteristic ________ approach.
Fill in the blank(s) with the appropriate word(s).
Every population has a characteristic
a. size. b. density. c. distribution. d. number of individuals in its various age categories. e. all of these.
The release of liquid water by leaves when soil moisture is high is known as:
a. vaporization. b. photosynthesis. c. guttation. d. transpiration. e. abscission.
Which of the following are empirically testable conclusions?
A. Your career earnings will be higher if you get an MBA. B. Price markups should be lower in markets with more firms. C. The average price of cable television will be higher if DirecTV and Comcast are allowed to merge relative to if they are not. D. None of the answers is correct.