Final answer:
The drug is likely to inhibit the electron transport chain in human cells due to its effect on the mitochondrial membranes.
Step-by-step explanation:
The drug that creates holes in both mitochondrial membranes (inner and outer) is likely to inhibit the electron transport chain in human cells. This is because the electron transport chain relies on intact mitochondrial membranes to function properly. By disrupting the membranes, the drug would disrupt the flow of electrons and hinder ATP synthesis, which is the main function of the electron transport chain.