Q.27 A protein involved in the formation of intermediate filaments of cytoskeletal framework
- Lamins
- G-Actins
- F-Actins
- α-tubulins
Lamins form the nuclear lamina, a type of intermediate filament in the cytoskeletal framework underlying the inner nuclear membrane.
Option Breakdown
Lamins
Lamins (A, B, C types) assemble into intermediate filaments forming the nuclear lamina, providing structural support to the nucleus and anchoring chromatin.
G-Actins
G-actins are globular monomers that polymerize into F-actin microfilaments (5-7 nm diameter), not intermediate filaments (10 nm).
F-Actins
F-actins represent filamentous actin, the primary component of thin microfilaments involved in cell motility and contraction.
α-Tubulins
α-tubulins dimerize with β-tubulins to form microtubules (25 nm diameter), part of the spindle apparatus and intracellular transport.
Introduction
Lamins are the protein involved in the formation of intermediate filaments of cytoskeletal framework, unlike G-Actins, F-Actins, and α-tubulins.
Cytoskeleton Components
The cytoskeleton comprises microfilaments (actin), microtubules (tubulin), and intermediate filaments (lamins in nucleus, keratins/vimentin in cytoplasm).
Protein Comparison Table
Protein Filament Type Diameter Cellular Role Lamins Intermediate 10 nm Nuclear lamina support G-Actins Microfilament monomer 5-7 nm Actin polymerization F-Actins Microfilament 7 nm Cell motility, cytokinesis α-Tubulins Microtubule 25 nm Mitotic spindle, transport
1 Comment
Ankita Pareek
May 11, 2026Lamins involved in the formation of intermediate filaments