Final answer:
The + end of the microtubules grows away from the MTOC, a process essential for various cellular functions including chromosome movement during cell division.
Step-by-step explanation:
The + end of the microtubules always grows away from the Microtubule Organizing Center (MTOC). This is because microtubules assemble by adding α/β-tubulin dimers to their growing ends, which are known as the plus ends.
During cell division, such as in mitosis or meiosis, these microtubules reorganize to form spindle fibers that facilitate the separation and movement of chromatids to the opposite poles of the cell. The disassembly at the minus end near the MTOC aids in this movement.
Microtubule dynamics are essential for various cellular processes including mitosis, where they facilitate the movement of chromosomes through the spindle apparatus.