Which of the following is an example of a protein that is inhibited when bound to its regulatory subunit(s) but becomes active when free?
a. Adenylyl cyclase
b. cAMP-dependent protein kinase
c. Protein kinase C
d. Phosphorylase kinase
Ans: b. cAMP-dependent protein kinase
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The reason segmental duplications pose a logistical challenge in the proper alignment of DNA sequences is that they
A. are inherently repetitive. B. contain large numbers of LINEs, which interfere with sequence annotation. C. interfere with BLAST analysis. D. are often found in areas of constitutive heterochromatin.
Extremely halophilic Archaea often form ________ in order to access ________
A) stalks / nutrients B) intracellular inclusions / elemental sulfur C) gas vesicles / oxygen D) intracellular membranes / sunlight
Compact bone is indicated by
a. A. b. B. c. C. d. D. e. E.
Decomposers recycle materials at __________
trophic level(s). a. the first b. the second c. the third d. the fourth e. any of these