When a G protein is activated in a signal transduction pathway, A. GDP is released from the G protein, and GTP occupies the nucleotide-binding site.
B. GTP is released from the G protein, and GDP occupies the nucleotide-binding site.
C. cGMP occupies the otherwise empty nucleotide-binding site on the G protein.
D. cGMP leaves the otherwise occupied nucleotide-binding site on the G protein.
E. GDP causes a conformational change in the G protein.

4.06 hc)a five-year review of threats to the southern resident orca population of the united states concluded that the top threats were prey availability, contaminants, and effects from recreational and whale watching vessels. further down the list are oil spills, disease, and effects from commercial vessels not targeting whales. how might this list be different if it were for transient whale populations, which have a larger average population size and live farther offshore in open waters? a)the transient population is more likely to be affected by contaminants. b)the transient population is less likely to be affected by whale watching vessels. c)the transient population is more likely to be affected by disease. d)the transient population is less likely to be affected by prey availability.

Aboy with an extra x chromosome probably has which of the following syndromes?

Hershey and chase confirmed that dna, not protein, was the genetic material. how do the results of their two experiments support this conclusion?