Multidrug Resistance in Tumor Cells Is

question 22

Multiple Choice

Multidrug resistance in tumor cells is

• A) due to the action of a membrane pump that transports small molecules out of the cells.
• B) the development of resistance to several drugs following an initial resistance to a single drug.
• C) caused by a mutation in the cystic fibrosis gene.
• D) due to the action of a membrane pump that transports small molecules out of the cells and the development of resistance to several drugs following an initial resistance to a single drug.
• E) All of the answers are correct.

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Definitions:

Downward-sloping

A descriptor often used for demand curves, indicating that as the price of a good or service decreases, the quantity demanded increases.

Law of Demand

The principle that there is an inverse relationship between the price of a good and the quantity demanded, holding other factors constant.

Quantity Demanded

The total amount of a good or service that consumers are willing and able to purchase at a specific price level.

Other Things Equal

A concept that assumes all other variables are kept constant except the ones being studied.