The smell of bread baking triggers a sensory response comprising multiple steps.Which is the first step of this process?
A) A G protein activates an enzyme.
B) A second messenger opens an ion channel.
C) Graded depolarization leads to an action potential.
D) An enzyme stimulates second messenger production.
E) An odorant molecule binds to a G protein-linked receptor.

Question

Quizplus · Accepted Answer

The first step in the process of the sensory response triggered by the smell of bread baking is the binding of an odorant molecule to a G protein-linked receptor. This binding initiates a cascade of events that ultimately leads to the perception of the smell of bread.

The Smell of Bread Baking Triggers a Sensory Response Comprising