Consider the Mechanism by Which Actin and Tubulin Polymerize

question 47

Multiple Choice

Consider the mechanism by which actin and tubulin polymerize.Which of the items below does not describe something similar about the polymerization mechanisms of actin and microtubules?

• A)Although both filaments can grow from both ends, the growth rate is faster at the plus ends.
• B)Depolymerization initiates at the plus ends of filaments.
• C)Nucleotide hydrolysis promotes depolymerization of filaments.
• D)Free subunits (actin and tubulin) carry nucleoside triphosphates.

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