ID #1557

True or False- Microtubules and tubulin building blocks both have polarity. Do tubulin building blocks refer to the dimers that polymerize to make microtubules? If so, does that make them have polarity if the microtubules themselves have polarity?

Yes, "building blocks" means the dimers that get added or removed from a MT. To determine if the dimers have polarity, ask yourself if the dimers have a different appearance at one end than they do at the other. If no, then they are not polar. If yes, then they are polar.

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