[Campbell Biology P.1173] Which statement about human taste perception is correct according t... | Practice Question

Which statement about human taste perception is correct according to the provided text?

  • A: Commonly depicted "taste maps" accurately show regional sensitivities on the tongue.
  • B: Sweet, umami, and bitter tastes are primarily detected by G protein-coupled receptors (GPCRs).
  • C: The receptor for salt taste is a TRP protein, similar to the sour taste receptor.
  • D: All five types of taste are detected by a single, universal type of receptor protein.

Explanation

The text states that sweet, umami, and bitter tastes each require one or more genes encoding a G protein-coupled receptor GPCR . It also clarifies that sour taste uses TRP proteins and salt taste uses a sodium channel, and that 'taste maps' are not accurate. Therefore, statement B is correct.