Problem:
Question: Which of the following statements about the cytoskeleton is true?
A) All eukaryotic cells have actin, microtubules, and intermediate filaments in their
cytoplasm.
B) The cytoskeleton provides a rigid and unchangeable structure important for the
shape of the cell.
C) The three cytoskeletal filaments perform distinct tasks in the cell and act
completely independently of one another.
D) Actin filaments and microtubules have an inherent polarity, with a plus end that
grows more quickly than the minus end.
Provide the correct answer and justification for your choice.