Biochemistry Help!!
1. Which statement is True regarding the Na+ voltage-gated channel in neurons?
a) aspartate residues are parrt of the Voltage-sensing helices
b)similiar to the potassium ion channel, it exisits as a tetramer in the membrane
c) Positivie membrane potentials on the extracellular side will close the channel.
2. Which membrane lipid serves as a reservoir of messenger molecules for signal transduction?
a)Shingomyelin (SM)
b) tarucholic acid (TA)
c) thromboxane A2 (TXA2)
d) Phosphatidylserine (PS)
e) Phosphatidylinositol 4,5-bisphosphate (PIP2)
3) G protein-coupled activation of phospholipase C directly generates which second messenger?
a) inositol-1,4,5-trisphosphate
b)calcium
c) diacylglycerol
d) both diacylglyerol and inositol-1,4,5-trisphosphate
e) both inositol-1,4,5-trisphosphate and calcium
4) Protein Kinase C is allosterically regulated by which second messangers?
a)diacylglyerol (DAG)
b) Calcium (Ca+2)
c) inositol trisphosphate (IP3)
d) both diacylglyerol (DAG) and Calcium (Ca+2)
e) both inositol trisphosphate (IP3) and diacylglyerol (DAG)
5) Phospholipase C hydrolyzes phosphatidylinositol 4,5-bisphosphate (PIP2) to form which signaling molecule that triggers Ca+2 release from the endoplasmic reticulum?
a) diacylglycerolphosphate (DAGP)
b) inositol 1,4,5-triphosphate (IP3)
c) diacylglycerol (DAG)
d) inositol 4,5- bisphosphate (IP2)
e) insoitol 5-monophosphate (IP1)
Biochemistry Help!!
1. Which statement is True regarding the Na+ voltage-gated channel in neurons?
a) aspartate residues are parrt of the Voltage-sensing helices
b)similiar to the potassium ion channel, it exisits as a tetramer in the membrane
c) Positivie membrane potentials on the extracellular side will close the channel.
2. Which membrane lipid serves as a reservoir of messenger molecules for signal transduction?
a)Shingomyelin (SM)
b) tarucholic acid (TA)
c) thromboxane A2 (TXA2)
d) Phosphatidylserine (PS)
e) Phosphatidylinositol 4,5-bisphosphate (PIP2)
3) G protein-coupled activation of phospholipase C directly generates which second messenger?
a) inositol-1,4,5-trisphosphate
b)calcium
c) diacylglycerol
d) both diacylglyerol and inositol-1,4,5-trisphosphate
e) both inositol-1,4,5-trisphosphate and calcium
4) Protein Kinase C is allosterically regulated by which second messangers?
a)diacylglyerol (DAG)
b) Calcium (Ca+2)
c) inositol trisphosphate (IP3)
d) both diacylglyerol (DAG) and Calcium (Ca+2)
e) both inositol trisphosphate (IP3) and diacylglyerol (DAG)
5) Phospholipase C hydrolyzes phosphatidylinositol 4,5-bisphosphate (PIP2) to form which signaling molecule that triggers Ca+2 release from the endoplasmic reticulum?
a) diacylglycerolphosphate (DAGP)
b) inositol 1,4,5-triphosphate (IP3)
c) diacylglycerol (DAG)
d) inositol 4,5- bisphosphate (IP2)
e) insoitol 5-monophosphate (IP1)