Which Experimental Observation Would Provide Evidence That a Bacterial Membrane

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.