Kartegener’s syndrome is a rare genetic disorder that results in immotile (unable to move) cilia. The immotile cilia cause infertility, bronchiectasis (permanent dilation of the bronchi) and recurrent sinusitis due to the inability to “push out” bacteria and particles from the sinuses. The genetic defect causes a deficiency of a protein primarily involved in which of the following structures? A. Microfilament

B. Intermediate filament

C. Microtubule

D. Plasma membrane