Cell Structure: Subcellular Components

AP Biology· difficulty 3/5

Which cytoskeletal element is the largest in diameter and serves as tracks for vesicle motors and forms the mitotic spindle?

A
$Intermediate filaments$
B
$Cell wall fibrils$
C
$Microtubules$
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D
$Microfilaments (actin)$

Explanation

Microtubules (~25 nm) are the largest cytoskeletal fibers; motor proteins move cargo along them and they form the spindle apparatus during mitosis.

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