Question 3(1 point) Which of the following proteins is a component of both bacterial flagella and human flagella? A. Dynein B. Alpha tubulin C. Opsin D. None of the above Saved

D. None of the above<br /><br />Bacterial flagella and eukaryotic flagella (like those found in humans, though often called cilia when short and numerous) are structurally and functionally different. They are analogous structures, meaning they serve a similar purpose (movement) but evolved independently. Therefore, they don't share common protein components.<br /><br />* **Dynein:** A motor protein associated with microtubules, found in eukaryotic flagella and cilia, but not bacterial flagella.<br />* **Alpha tubulin:** A protein that forms microtubules, the core structural component of eukaryotic flagella and cilia. Bacterial flagella are made of flagellin.<br />* **Opsin:** A light-sensitive protein found in photoreceptor cells of the eye, not related to flagella.<br />