____________ occurs when an antibody marks a bacterium to be engulfed by a macrophage. 00:09 Biology ____________ occurs when an antibody marks a bacterium to be engulfed by a macrophage.a. Neutralizationb. Eutrophicationc. Complementationd. OpsonizationAnswer: d. Opsonization Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+