Which of the following steps in a signaling cascade

Which of the following steps in a
signaling cascade initiated by a G
protein−coupled receptor would
be directly affected in cells
cultured in the presence of a non-
hydrolyzable ATP? Select all that
apply.
B. protein kinase activity
C. adenylyl cyclase activity
Which of the following correctly
pairs enzymes that activate and
terminate the same step in a
signaling event? Select all that
apply.
A. adenylyl cyclase (activates) and
phosphodiesterase (terminates)
B. protein kinase (activates) and
phosphatase (terminates)
Which of the following scenarios
would still result in a proliferation
signal via the kinase cascade in the
absence of ligand binding to its
receptor kinase?
When nutrients are suboptimal for
cell growth and division, the cell
cycle arrests. At which stage of the
cell cycle/checkpoint would you
predict this arrest to occur?
A. G
1
checkpoint
Which of the following could
account for the increased cell
proliferation in the patient? Select
all that apply.
A. The cells taken from the patient
have more growth factor receptors
than normal.
B. The concentration of a signaling
molecule in the patient is higher
than usual.

Which one of the following would
most likely contribute to
uncontrolled cell proliferation (i.e.,
cancer)?
During synaptic transmission: Beginning at the synapse of a
neuron, place the following events
in neuronal signaling in the correct
sequence.
How is a nerve impulse generated
when most sensory receptors are
activated?
Multiple sensory receptors can
synapse on a single neuron. The
receiving neuron has a firing rate
proportional to the number of
signals received. Which of the
following is this an example of?