alleryStart learning →Which shape are microtubules described as having?
ASmall hollow tubes
BSolid twisted ropes
CFlat stacked sheets
DRound sealed sacs
Answer & Solution
Correct answer: A. Small hollow tubes
1. The name microtubule already carries the answer.
2. Microtubules are small hollow tubes.
3. Their walls are built from polymerized dimers of two globular proteins.
4. At about 25 nanometers across they are the widest components of the cytoskeleton.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.5 The Cytoskeleton_
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