Multiple Choice
Why are microtubules considered among the non-membranous organelles?
A) They do not have their own enclosed membrane.
B) They are associated with the plasma membrane.
C) They are aggregated into bundles.
D) They are composed primarily of the protein actin.
E) They are comprised chiefly of the protein tubulin.
Correct Answer:

Verified
Correct Answer:
Verified
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