Which taste modality does not involve activation of a G-protein coupled receptor?
A)bitter
B)sweet
C)umami
D)sour
E)all taste sensations involve GPCRs

Question

Quizplus · Accepted Answer

Sour taste sensation is not due to activation of a G-protein coupled receptor. Instead, it is caused by the detection of hydrogen ions (H+) which directly interact with ion channels on taste cells, causing depolarization and triggering an action potential.

Which Taste Modality Does Not Involve Activation of a G-Protein