Multiple Choice
Which of the following proteins are associated with actin nucleation?
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15. Cytoskeleton and Cell Movement
Actin Filaments
Multiple Choice
Actin monomers are added to both the minus end and the plus end of a growing actin filament?
A
True
B
False
Verified step by step guidance1
Understand the structure of an actin filament: Actin filaments, also known as microfilaments, are polar structures with a plus (+) end and a minus (-) end.
Recognize the dynamics of actin polymerization: Actin monomers (G-actin) can add to both ends of the filament, but the rates of addition differ between the two ends.
Identify the plus end: The plus end of an actin filament is the fast-growing end where monomers are added more rapidly.
Identify the minus end: The minus end is the slow-growing end where monomers are added at a slower rate compared to the plus end.
Conclude based on dynamics: While monomers can technically add to both ends, the significant addition occurs predominantly at the plus end due to the higher rate of polymerization there.
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