Unlike Sweet,salty,sour,or Umami,the "Bitter" Category of Tastants Includes Wide Structural

question 27

Multiple Choice

Unlike sweet,salty,sour,or umami,the "bitter" category of tastants includes wide structural variety of detected molecules.Multiple receptors are required to sense the different bitter tastants.What do they have in common? Bitter taste is thought to have evolved as a warning system for toxic compounds.
-The bitter receptor hTAS2R38 is activated by glucosinolates found in plants such as turnips and broccoli.Glucosinolates can block synthesis and transport of iodine.Before the advent of iodized salt,this was a particular problem in areas of the world that are naturally low in iodine.Why might the human population include different variants of the hTAS2R38 gene?

• A)Areas of high iodine are generally coastal,and turnips and broccoli are not easily grown there.
• B)Iodine created mutations in the hTAS2R38 gene.
• C)Where iodine was low,eating plants rich in glucosinolates helped people metabolize iodine,but where iodine was high they avoided such foods.
• D)Where iodine was low,it was important to avoid foods with glucosinolates,but where iodine was plentiful,palatability of a wider range of plants was beneficial.

---

Definitions:

Internal Revenue Service

The U.S. federal agency responsible for administering and enforcing the tax laws and collecting taxes.

Corporate Officer

Executives who are appointed by a corporation's board of directors to manage the corporation's affairs.

Day-To-Day Operations

The regular, routine activities necessary for a business or organization to function effectively.

Model Business Corporation Act

A standardized set of laws designed to regulate business corporations, serving as a guide for state legislatures in drafting their corporate statutes.