Cell Signalling and Transduction
The enzyme that catalyzes the splitting of PIP2 into two molecules of inositol triphosphate (IP3) and diacylglycerol in cell signaling, is

phospholipase C
phosphokinase C
lipokinase
phosphodiesterase C

ANSWER DOWNLOAD EXAMIANS APP

Cell Signalling and Transduction
The binding of ligands to many G-proteins linked receptors leads to shortlived

increase in the concentration of certain extracellular signaling molecules called first messenger
decrease in the concentration of certain intracellular signaling molecules called second messenger
increase in the concentration of certain intracellular signaling molecules called second messenger
decrease in the concentration of certain extracellular signaling molecules called first messenger

ANSWER DOWNLOAD EXAMIANS APP

Cell Signalling and Transduction
Nitroglycerin has long been administered to human patients suffering from chronic chest pain (angina). This medication works because it

breaks down into nitric oxide, which increases blood flow to the heart
interferes with chemical cascades that trigger contraction of heart muscle
is broken down into hormones that affect the heart
mimics the action of signal receptors

ANSWER DOWNLOAD EXAMIANS APP

Cell Signalling and Transduction
Cell signaling can be classified into

three distinct types based on the distance over which the signaling molecules act
None of these
two distinct types based on the distance over which the signaling molecules act
three distinct types based on the signaling molecules

ANSWER DOWNLOAD EXAMIANS APP

Cell Signalling and Transduction
In the signal transduction mechanism known as protein phosphorylation

receptor kinases play a key role in triggering the signal cascade
the signaling molecule binds to a surface receptor
All of these
phosphorylated proteins act with enzymes to trigger the signal cascade

ANSWER DOWNLOAD EXAMIANS APP