Multiple Choice
Treadmilling is when a microtubule end switches from polarization to depolarization.
15. Cytoskeleton and Cell Movement
Microtubules
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A single tubulin subunit is composed of which of the following components?
A
An alpha tubulin
B
A beta tubulin
C
A dimer of alpha and beta tubulin
D
A tetramer of alpha and beta tubulin
Verified step by step guidance1
Understand that tubulin is a protein that forms microtubules, which are part of the cytoskeleton in eukaryotic cells.
Recognize that a tubulin subunit is not a single protein but a complex of two different proteins.
Identify the two types of tubulin proteins involved: alpha-tubulin and beta-tubulin.
Learn that these two proteins, alpha-tubulin and beta-tubulin, come together to form a dimer, which is the basic building block of microtubules.
Clarify that a dimer is a molecule or molecular complex consisting of two identical or different molecules linked together, in this case, one alpha-tubulin and one beta-tubulin.
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