Some people can detect PTC, a bitter compound found in broccoli and Brussels sprouts, whereas others cannot. Which of the following is the MOST likely explanation for this observation?
A)The G protein pathway that alters the conformation of the sodium channels is defective.
B)Chemoreceptors specific for PTC are not expressed.
C)Too few sodium channels are present in the taste receptors.
D)Neurotransmitter release from these taste receptors is impaired.

Question

Quizplus · Accepted Answer

The ability to detect PTC is determined by genetic variation in the TAS2R38 gene, which codes for a chemoreceptor specific for PTC. Therefore, individuals who cannot detect PTC lack the expression of this chemoreceptor.

Some People Can Detect PTC, a Bitter Compound Found in Broccoli