If flagellar rotation of Escherichia coli cells is ________, then CheA is ________.
A. clockwise; unphosphorylated
B. clockwise; autophosphorylated
C. counterclockwise; unphosphorylated
D. counterclockwise; autophosphorylated
Answer: C
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Consider this pathway: epinephrine ? G protein-coupled receptor ? G protein ? adenylyl cyclase ? cAMP. The second messenger in this pathway is _____
A) cAMP B) G protein C) GTP D) adenylyl cyclase E) G protein-coupled receptor
Viruses infecting algae have never been detected.
Answer the following statement true (T) or false (F)
Which structure separates the thoracic and abdominal cavities?
a. the diaphragm b. the liver c. the stomach d. the duodenum e. the ribs
In a neuron maintaining a resting potential, K+ is encouraged to move out the neuron by favorable _________ gradient.
A. concentration B. electrical C. concentration and electrical