Which Statement Describes the Mode of Action of the ABCB1

question 4

Multiple Choice

Which statement describes the mode of action of the ABCB1 transporter (the first eukaryotic ABC transporter to be recognized) ?

• A)During transport,the ligand binding site is alternately exposed to the exoplasmic and the cytoplasmic side of the membrane.
• B)During transport,a conserved aspartate residue is phosphorylated.
• C)This class of pumps transports only H⁺ ions.
• D)This transporter acts as a chloride channel.

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Definitions:

Total Revenue

The total amount of money received by a company from selling goods or services before any expenses are deducted.

Inverse Demand Function

A mathematical representation that describes the relationship between the price of a good and the quantity that consumers are willing and able to purchase, expressed as price as a function of quantity demanded.

Marginal Cost

The expenditure involved in the production of an extra unit of a good or service.

Elasticity of Demand

An indicator of the degree to which demand for a product changes in response to a variation in its price, shown as a percentage.