If You Did Not Have a Functional Gene for the T1R3

Question

If you did not have a functional gene for the T1R3 receptor, you would be unable to respond to
A) Sweet tastants
B) Bitter tastants
C) Um ami tastants
D) Both sweet and bitter tastants
E) Both sweet and umami tastants

Accepted Answer

The T1R3 receptor is a component of both the sweet and umami taste receptors. Therefore, lacking a functional gene for T1R3 would impair the ability to taste sweet and umami flavors.