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:

Normal Balance

The side (debit or credit) of an account that is typically increased. For example, assets and expenses usually have a debit normal balance, while liabilities, equity, and revenue have a credit normal balance.

Adjusting Journal Entry

A record made in the books to correct or update financial statements prior to issuing them, ensuring they reflect true values.

Fees Earned

Revenue generated from providing services, as opposed to selling goods, in a given period.

Prepaid Expense

An expense that has been paid in advance and will be recognized as an expense in a future accounting period.