alleryStart learning →Microfilaments are built from two intertwined strands of which globular protein?
ATubulin protein
BActin protein
CKeratin protein
DMyosin protein
Answer & Solution
Correct answer: B. Actin protein
1. Microfilaments function in cellular movement and are the narrowest cytoskeletal fibers.
2. They are made of two intertwined strands of a globular protein called actin.
3. For this reason microfilaments are also known as actin filaments.
4. Tubulin is the globular protein of microtubules instead, so that answer belongs to a wider fiber.
5. The protein of the microfilament is actin.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.5 The Cytoskeleton_
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