Cytoskeleton Quiz

What is the primary function of the cytoskeleton?

• Energy production

• Cell shape and movement

• Protein synthesis

• DNA replication

Which type of filament is primarily involved in muscle contraction?

• Cilia

• Intermediate filaments

• Microtubules

• Actin filaments

What structure is formed by the self-assembly of protein subunits?

• Ribosome

• Cytoskeleton

• Mitochondria

• Nucleus

Which protein is responsible for the movement along actin filaments?

• Tubulin

• Kinesin

• Dynein

• Myosin

Which of the following is a characteristic of intermediate filaments?

• Dynamic and adaptable

• Only found in plants

• Provide mechanical strength

• Involved in cell division

What is the function of capping proteins in actin filaments?

• Facilitate disassembly

• Prevent depolymerization at the plus end

• Bind to the minus end

• Promote polymerization

Which type of cytoskeletal structure is involved in the formation of the mitotic spindle?

• Actin filaments

• Microtubules

• Cilia

• Intermediate filaments

What is the primary role of profilin in actin dynamics?

• Nucleation of actin filaments

• Binding to ADP-actin

• Facilitating filament elongation

• Capping the plus end

Which GTPase protein is associated with the formation of filopodia?

• Arp2/3

• Rho

• Rac

• Cdc42

What is the consequence of the different critical concentration for hydrolyzed nucleotide in actin and microtubule dynamics?

• Stabilization of filaments

• Filament treadmilling

• Inhibition of polymerization

• Formation of stable structures