Final answer:
The cytoskeleton includes microtubules, microfilaments, and intermediate filaments, but not nucleotides, which are the building blocks of nucleic acids and not involved in the cytoskeletal structure.
Step-by-step explanation:
The components of the cytoskeleton may include all of the following, except nucleotides. The cytoskeleton comprises three main types of protein fibers: (a) microtubules, (b) microfilaments (also known as actin filaments), and (c) intermediate filaments.
These elements are essential for maintaining cell shape and structure, promoting cellular movement, and aiding in cell division. Microtubules are the thickest and act as tracks for motor proteins and play a role in cell division.
Microfilaments are the thinnest and are involved in movement and muscle contraction. Intermediate filaments are of intermediate diameter and are important for maintaining cell shape and anchoring organelles such as the nucleus.
Nucleotides, however, do not form part of the cytoskeleton; instead, they are the building blocks of nucleic acids like DNA and RNA.