The herbicide 2,4-dichlorophenoxyacetic acid acts to disrupt the tertiary structure of the enzyme ubiquitin ligase. When the active site of ubiquitin ligase has been denatured the cells in the plant begin to divide uncontrollably. Which of the following is the most likely function of ubiquitin ligase? A Cell recognition proteinCell recognition protein

B Metabolizer of hydrogen peroxideMetabolizer of hydrogen peroxide

C Electron chain transport proteinElectron chain transport protein

D Digestive enzymeDigestive enzyme

E Cell cycle regulator