Multiple Choice
Which of the following terms describes the addition of monomers at the plus end and the loss of monomers at the minus end?
15. Cytoskeleton and Cell Movement
Actin Filaments
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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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