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

Biology & Microbiology

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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.

Biology & Microbiology

Chromosomes decondense during what phase of mitosis?

a. prophase b. metaphase c. anaphase d. telophase

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology