PTC Gene & Bitter Taste Test Questions And Answers Guaranteed Success.
5 views 0 purchase
Course
PTC.
Institution
PTC.
In 1931, a chemist named - correct answer Arthur Fox was pouring some powdered PTC into a bottle
-some powder flew into air and a colleague complained that dust tasted bitter (Fox tasted nothing at all)
-tasted again and same results
-Fox had friend...
In 1931, a chemist named - correct answer Arthur Fox was pouring some
powdered PTC into a bottle
-some powder flew into air and a colleague complained that dust tasted bitter (Fox tasted nothing at all)
-tasted again and same results
-Fox had friends and family try it and describe it
-some tasted nothing, intensely bitter, or slightly bitter
PTC stands for - correct answer phenylthiocarbamide (also known as
phenylthiourea)
The chemical structure of PTC resembles - correct answer toxic alkaloids found
in some poisonous plants
PTC itself is NOT - correct answer poisonous and is harmless when tasted
Ratio of tasters to non-tasters varies btwn populations, but every group has - correct answer
some tasters and some non-tasters
-on average: 75% of people can taste PTC while 25% cannot
PTC gene - correct answer TAS2R38
Receptors are - correct answer transmembrane proteins
Geneticists determined that there is an - correct answer inherited component
that influences how we taste PTC
Today, The ability to taste or not taste PTC is conveyed by - correct answer
single gene on chrom #7 that codes for taste receptor on tongue
, PTC gene, TAS2R38 was discovered in - correct answer 2003
There are - correct answer 2 common forms (alleles) and at least 3 rare forms
of PTC gene
Each allele codes for a - correct answer bitter taste receptor protein with a
slightly different shape
-shape of receptor determines how strongly it can bind to PTCC
All people have - correct answer 2 alleles for every gene (one from dad and
one from mom)
Is PTC found in nature? - correct answer No
The ability to taste PTC correlates strongly with - correct answer the ability to
taste other bitter substances that do occur naturally (many of which are toxins)
Plants produce a variety of toxic compounds to protect themselves from being eaten. The ability to
discern - correct answer bitter tastes evolved as a mechanism to prevent early
humans from eating poisonous plants
Humans have about 30 different - correct answer genes that code for bitter
taste receptors
-each receptor can interact with several compounds allowing people to taste a wide variety of bitter
substances
-1 of 30 different genes
-REVIEW
PTC gene has several variable - correct answer nucleotide positions (SNPs), but
only 3 positions account for majority of observed SNPs
-positions are nucleotides 145, 785, and 886
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller RealGrades. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
