GENERAL HISTOLOGY

EPITHELIUM

CILIA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Microfilaments are composed of
A
mosaic protein
B
tubulin protein
C
chitin protein
D
actin protein
Explanation: 

Detailed explanation-1: -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-2: -Microfilaments are composed of actin protein subunits Actin exists in two forms: G-actin (or globular actin) and F-actin (or fibrous actin). G-actin, a single polypeptide chain with a molecular weight of about 42 kDa, has a roughly globular configuration.

Detailed explanation-3: -Microfilaments are composed of a protein called actin, which is dyed green in these ∼30 MDCK cells using a fluorescently labeled actin-binding protein.

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