PTC Lab Test- Biotech Q & As (Verified Answers) 2026.

PTC Lab Test- Biotech Q & As (Verified
Answers) 2026
What does PTC stand for? How was it discoverd? - Correct
Answers ✅PTC- phenylthiocarbamide


PTC was discovered by Arthur Fox in 1931 when he poured
PTC powder in bottle and some accidentally blew in the air;
many near him claimed the dust tasted bitter but he could
not taste anything ; this accident discovered that some
thought it tasted really bitter, slightly bitter, and no taste at
all.


How many genes are involved in tasting PTC? - Correct
Answers ✅1


allele frequency - Correct Answers ✅is the relative
frequency of an allele (variant of a gene) at a particular locus
in a population, expressed as a fraction or percentage


gene frequency - Correct Answers ✅the number of
individuals with a given genotype divided by the total number
of individuals in the population. In population genetics


PAV allele - Correct Answers ✅dominant haplotype for the
ability to taste PTC (proline, alanine, and valine)


AVI allele - Correct Answers ✅recessive haplotype for the
inability to taste PTC (alanine, valine, isoleucine)