1) Ca2+ influx thru a channel that is activated by a change in the membrane pote
ID: 927690 • Letter: 1
Question
1)
Ca2+ influx thru a channel that is activated by a change in the membrane potential across the plasma membrane is an example of a(n):
Ligand gated channel
Voltage-gated channel
Active transport
Passive diffusion
2)
Steroid hormones bind which of the following types of receptors?
tyrosine kinases
intracellular receptors
G-protein coupled receptors (GPCR)
serine-threonine kinases
3)
Phospholipase C can be activated downstream of several different signaling cascades. Activation of this enzyme results in the generation of which of the following secondary messangers?
Inositol phosphate and diacylglycerol
phosphorylated STAT
PIP2
cAMP
4)
In bacteria, what distinguishes the parental from the newly synthesized strand?
methylation of the DNA backbone
phosphorylation of the DNA backbone
acylation of the DNA backbone
glycosylation of the DNA backbone
a.Ligand gated channel
b.Voltage-gated channel
c.Active transport
d.Passive diffusion
Explanation / Answer
1(b
2)b
3)b
4)a
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