Use the following figure to answer the questions below.

-In the above diagram, the structure labelled A is a(n)
A)second messenger.
B)activated relay molecule.
C)ligand.
D)receptor.
E)phosphorylation cascade.

Question

Use the following figure to answer the questions below.
 
-In the above diagram, the structure labelled A is a(n)
A)second messenger. 
B)activated relay molecule. 
C)ligand. 
D)receptor. 
E)phosphorylation cascade.

Quizplus · Accepted Answer

The structure labelled A is a ligand, which is a molecule that binds to a receptor to initiate a cellular response.

Use the Following Figure to Answer the Questions Below