Cytoskeleton, Actin and intermediate filament recap

What is the primary function of the cytoskeleton?

• To store genetic information

• To maintain cell shape and transport materials

• To synthesize proteins

• To produce energy

Which type of filament is the smallest in diameter?

• Microtubules

• Actin filaments

• Myosin filaments

• Intermediate filaments

What is the role of actin filaments in cell movement?

• They enable cell crawling through contractions

• They assist in cell division

• They transport organelles exclusively

• They provide structural support only

What are intermediate filaments primarily composed of?

• Actin proteins

• Globular proteins

• Various proteins depending on function

• Myosin proteins

How do actin filaments contribute to cell shape?

• By facilitating energy production

• By resisting tension and pulling

• By providing rigidity

• By forming a fluid matrix

What is the diameter of actin filaments?

• Approximately 15 nm

• Approximately 5 nm

• Approximately 7 nm

• Approximately 10 nm

What is the function of microtubules in the cytoskeleton?

• To maintain cell shape

• To transport organelles

• To provide energy

• To resist tension

Which of the following is NOT a function of the cytoskeleton?

• Cell division

• Movement of organelles

• Cell shape maintenance

• Energy production

What is the primary role of myosin in relation to actin filaments?

• To act as a motor protein for movement

• To assist in cell division

• To form the cytoskeleton

• To stabilize the cell membrane

What do actin filaments form just under the cell membrane?

• A lattice

• A rigid structure

• A fluid matrix

• A network of microtubules