A researcher isolates the protein subunits responsible for forming the spindle fibers during mitosis. Which specific protein makes up these hollow cylinders?
Q1. A researcher isolates the protein subunits responsible for forming the spindle fibers during mitosis. Which specific protein makes up these hollow cylinders?
Answer: Tubulin
Explanation: Microtubules are composed of tubulin protein, while microfilaments consist of actin, though both are essential components of the cytoskeleton.