Cell Signalling and Transduction
What is the name of the protein signaling molecule that alters glucose uptake, and where would its receptors be located?

Insulin; beta cells of the pancreas
NGF; the nerves involved in simple reflexes
PDGF; the blood
Insulin; many different cell types that use glucose for fuel

ANSWER DOWNLOAD EXAMIANS APP

Cell Signalling and Transduction
A signal cascade induced by adrenaline or thyroxine

involves the activation of a G protein
All of these
results in the activation of a sequence of enzymes needed for the cell effect
must begin with receipt of the signal molecule by a surface receptor

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP

Cell Signalling and Transduction
In terms of cell communication, what do bacterial pathogens such as cholera and anthrax have in common?

They alter the chemical structure of key signaling molecules
They prevent the production of key signaling molecules
They destroy the receptors for key signaling molecules
They block the normal functioning of signal transduction mechanisms

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

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Cell Signalling and Transduction