If a Membrane Protein in an Animal Cell Is Involved

question 71

Multiple Choice

If a membrane protein in an animal cell is involved in the cotransport of glucose and sodium ions into the cell, which of the following is most likely True?

• A)The sodium ions are moving down their electrochemical gradient while glucose is moving up.
• B)Glucose is entering the cell along its concentration gradient.
• C)Sodium ions can move down their electrochemical gradient through the cotransporter whether or not glucose is present outside the cell.
• D)Potassium ions move across the same gradient as sodium ions.
• E)A substance that blocked sodium ions from binding to the cotransport protein would also block the transport of glucose.

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