What is a role of calcium ions in the second-messenger cascade involving phospholipase C,diacylglycerol,and inositol trisphosphate?
A)It splits and activates G-protein subunits.
B)It binds to the endoplasmic reticulum and causes the release of inositol trisphosphate.
C)It phosphorylates cell proteins.
D)It is the first messenger that binds to the integral membrane protein receptor.
E)Along with diacylglycerol,it activates protein kinase C.

Question

What is a role of calcium ions in the second-messenger cascade involving phospholipase C,diacylglycerol,and inositol trisphosphate?
A)It splits and activates G-protein subunits.
B)It binds to the endoplasmic reticulum and causes the release of inositol trisphosphate.
C)It phosphorylates cell proteins.
D)It is the first messenger that binds to the integral membrane protein receptor.
E)Along with diacylglycerol,it activates protein kinase C.

Quizplus · Accepted Answer

In the second-messenger cascade involving phospholipase C, diacylglycerol (DAG), and inositol trisphosphate (IP3), calcium ions (Ca2+) play a crucial role by acting together with DAG to activate protein kinase C (PKC). This activation leads to the phosphorylation of various proteins, initiating a cascade of cellular responses.

What Is a Role of Calcium Ions in the Second-Messenger