A G-protein coupled receptor associates with a G protein that contains how many subunits?
A. 0
B. 1
C. 2
D. 3
E. 4
D. 3
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Transmembrane proteins must have:
A. a signal sequence. B. a signal-anchor sequence. C. a nuclear localization sequence. D. both a signal sequence and a signalanswer sequence.
Chromosomes decondense during what phase of mitosis?
a. prophase b. metaphase c. anaphase d. telophase
Which two parameters measure ecosystem changes?
a. resistance and resilience b. resistance and equilibrium c. biomagnification and resilience d. gross primary productivity and net primary productivity
Crossing over is ________.
A. an independent assortment of chromosomes B. the exchange of corresponding portions of homologous chromosomes. C. the formation of tetrads D. the movement of genetic material from one chromosome to a nonhomologous chromosome