Tamoxifen Is a Drug Used to Prevent the Recurrence of Certain

question 130

Multiple Choice

Tamoxifen is a drug used to prevent the recurrence of certain types of breast cancers that require estrogen to grow.Tamoxifen binds to the active site of the estrogen receptor protein, preventing estrogen from binding to the enzyme.Once Tamoxifen binds to the protein, the protein is permanently deactivated.Which descriptions BEST fits Tamoxifen?

• A) Tamoxifen is an irreversible, noncompetitive inhibitor.
• B) Tamoxifen is a reversible, noncompetitive inhibitor.
• C) Tamoxifen is an irreversible, competitive inhibitor.
• D) Tamoxifen is a reversible, competitive inhibitor.
• E) Tamoxifen is not an inhibitor.

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Definitions:

Homo Sapiens

The species name for modern humans, characterized by bipedalism, high brain capacity, and complex social behaviors.

Neanderthals

Neanderthals were archaic humans who lived in Eurasia until about 40,000 years ago, known for their robust build and large cranial capacity.

African Continent

The world's second-largest and second-most populous continent, located south of Europe and bordered to the west by the Atlantic Ocean and to the east by the Indian Ocean.

Extinct Human Populations

Groups of humans who have no living descendants, often identified through archaeological and genetic evidence.