EPITHELIUM
CILIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A microfilament have twisted double chain of actin subunits.
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A actin subunits.
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I don’t know.
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Doesn’t have a double chain.
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Detailed explanation-1: -Actin is the structural protein of microfilaments, and it usually exists in two forms: monomer and polymer. Among them, monomer actin is a spherical molecule composed of a polypeptide chain, also known as spherical actin. The function of actin polymers is to produce actin filaments, so it is also called fibroactin.
Detailed explanation-2: -Actin filaments (F-actin) are linear polymers of globular actin (G-actin) subunits and occur as microfilaments in the cytoskeleton and as thin filaments, which are part of the contractile apparatus, in muscle and nonmuscle cells (see contractile bundles).
Detailed explanation-3: -Microfilaments are thin (7 nm) molecules composed principally of actin protein subunits, which polymerize to form elongated actin filaments (F-actin). Individual actin molecules, called G-actin, carry ATP to provide energy for the polymerization process.
Detailed explanation-4: -Actin filaments consist of two strands of globular molecules twisted in the form of a helix (see Fig. 2). Actin is encoded by a multigene family in mammals.