The following graph depicts the uptake of lactose into the cells. Which of the f

Question

The following graph depicts the uptake of lactose into the cells. Which of the following conclusions can be drawn based on the information provided? inhibition of fuel oxidation CN, or mutation at Glu325 or Arg302 um Time Select one: cross out Aka. Cyanide (CN-) is a direct inhibitor of lactose transport cross out b. Cyanide (CN-) reverses the effects of the Arg302 mutation cross out ° C. ATP is required for lactose export O d. Glu325 or Arg302 are amino acids likely associated with the membrane- cross out spanning domain of the transporter e. Glu325 or Arg302 are amino acids likely involved in binding lactose on the cross out extracellular surface of the transporter

Explanation / Answer

In my opinion, Option d is correct because binding of lactose to lacY protein is facilitated by Histidine. Glutamate and Arginine are involved in the proton transfer chain that moves the lactose molecule from the periplasmic side of the membrane to the cytoplasmic side.

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