The solid linear cytoskeletal elements having a diameter of 7 nm and made up of a single type of monomer are known as
Correct answer: B. Microfilaments
- A. Microtubules
- B. Microfilaments
- C. Intermediate filaments
- D. Cilia
Explanation
Microtubules are hollow microscopic tubular structures with an external diameter of 24 nm and of variable length. They are composed of tubulin. Intermediate filaments are the numerous microscopic protein fibers of about 10 nm thickness that form part of the cytoskeleton. They are intermediate in size between microtubules and microfilaments.They are made up of a variety of proteins e.g. keratin in nails. Microfilaments are fine, thread-like protein fibers, 7nm in diameter. They are composed predominantly of a contractile protein called actin.
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