Which Experimental Observation Would Provide Evidence That a Bacterial Membrane

question 152

Multiple Choice

Which experimental observation would provide evidence that a bacterial membrane protein transfers the sugar lactose into the cell via secondary active transport?

• A) The membrane protein undergoes a conformational change when it binds lactose.
• B) The membrane protein binds lactose but has no nucleotide binding site.
• C) The membrane protein transfers lactose against its concentration gradient.
• D) The membrane protein binds to sodium ions at a site different from the lactose site.
• E) The membrane protein from the bacterium shares many structural similarities with the corresponding membrane protein from yeast.

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