Multiple Choice
Under which condition is a GTP cap formed during microtubule formation?
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15. Cytoskeleton and Cell Movement
Microtubules
Multiple Choice
Which cytoskeletal component consists of hollow tubes that provide structural support for the cell?
A
Collagen fibers
B
Microtubules
C
Actin filaments (microfilaments)
D
Intermediate filaments
Verified step by step guidance1
Identify the four options given: Collagen fibers, Microtubules, Actin filaments (microfilaments), and Intermediate filaments.
Recall the main characteristics of each cytoskeletal component: Collagen fibers are extracellular matrix proteins, not part of the cytoskeleton inside the cell.
Understand that microtubules are hollow tubes made of tubulin proteins that provide structural support and serve as tracks for intracellular transport.
Recognize that actin filaments (microfilaments) are thin, solid fibers involved in cell movement and shape but are not hollow tubes.
Know that intermediate filaments provide mechanical strength but are solid fibers, not hollow tubes; therefore, the cytoskeletal component consisting of hollow tubes is microtubules.
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