16 Questions
Which type of cytoskeletal filaments is mainly responsible for transporting and positioning membrane organelles?
Microtubules
What is the main function of intermediate filaments?
To withstand the mechanical stress when a cell is stretched
Which type of cytoskeletal filaments forms rope-like structures and extends across the cell cytoplasm?
Intermediate filaments
What are microtubules built from?
Tubulin dimers
Which type of cytoskeletal filaments interact with a large number of actin binding proteins and can form stiff structures like microvilli?
Microfilaments
Where are microfilaments localized within the cell?
At the cell cortex
Which type of cytoskeletal filament is composed of alpha and beta-tubulin?
Microtubules
What is the main function of microtubules?
To transport and position membrane organelles
What are the toughest and most durable cytoskeletal filaments?
Intermediate filaments
What type of protein subunits does cytoskeletal proteins form polymers/fibres from?
Tubulin dimers
What do microtubules grow out from near the center of the cell?
Centrosome
Intermediate filaments are mainly responsible for transporting and positioning membrane organelles
False
Microtubules are composed of alpha and beta-tubulin
True
Actin filaments are longer and more flexible than microtubules
False
Microtubules can form cilia and flagella
True
The main function of intermediate filaments is to withstand mechanical stress when a cell is stretched
True
Test your knowledge of the intricate network of protein filaments that make up the cytoskeleton, including its structure and composition. Explore the functions of intermediate filaments, microtubules, and microfilaments in providing mechanical support to cells.
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