Which of the Following Statements About Microtubules Is TRUE

question 52

Multiple Choice

Which of the following statements about microtubules is TRUE?

• A)Motor proteins move in a directional fashion along microtubules by using the inherent structural polarity of a protofilament.
• B)The centromere nucleates the microtubules of the mitotic spindle.
• C)Because microtubules are subject to dynamic instability, they are used only for transient structures in a cell.
• D)ATP hydrolysis by a tubulin heterodimer is important for controlling the growth of a microtubule.

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