The adenine nucleotide translocase (adp-atp translocase), a transporter located in the innter mitochondrial membrane, transports adp and atp across the membrane. it is an antiporter. (recall that these adenine nucleotides are negatively charged: adp3- and translocase is also located in the inner mitochondrial membrane. it transports h+ and phosphate (h2po4-) across the membrane. it is a symporter. answer parts (a), (b), (c), and (d) below. a) which direction is atp4- transported during times of active oxidative phosphorylation? b) what drives the transport of adenine nucleotides? c) what is the ratio of adp to atp transported by the adenine nucleotide translocase? that is, how many adp are transported for each atp transported? d) what drives the transport of h2po4- across the membrane? which direction is it transported during oxidative phosphorylation?