As electrons are passed down the electron transport chain, the molecules are first as they pick up electrons, and then as they release the electrons.

Ithink the answer is nuclear membrane

Iam not sure but to me it with be a or dsorry if i was late! hope this ! : )if you really want me to find out the answer that is correct tell me and i will do more research but the a or d makes sense to me.

B. to increase the amount of antibiotics in the body