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Questions and Answers

What is the primary function of intermediate filaments in a cell?

To maintain the shape of the cell and anchor organelles (correct)
To provide tracks for motor proteins
To resist compression forces
To grow and shrink quickly by adding or removing proteins

Which type of protein forms intermediate filaments?

Tubulin
Actin
Keratin (correct)
Dynein

What is the function of microtubules in a cell?

To move an entire cell
To bear tension and maintain cell shape
To anchor the nucleus and other organelles
To resist compression forces and provide tracks for motor proteins (correct)

What is the characteristic of microtubules that allows them to grow and shrink quickly?

They can add or remove tubulin proteins (A) Signup and view all the answers

What is the function of flagella in a cell?

To move an entire cell (D) Signup and view all the answers

What is the difference between motile cilia and flagella?

Motile cilia are shorter and usually appear in large numbers (B) Signup and view all the answers

What is the primary function of centrioles in animal cells?

To act as microtubule organizing centers (C) Signup and view all the answers

What is the main component of plant cell walls?

Cellulose (A) Signup and view all the answers

What is the function of plasmodesmata in plant cells?

To allow direct cytoplasmic exchange between cells (A) Signup and view all the answers

What is the primary function of tight junctions in animal cells?

To prevent liquid from seeping between cells (C) Signup and view all the answers

What is the role of claudins in tight junctions?

To form the tight seal of a tight junction (C) Signup and view all the answers

What is the primary component of the extracellular matrix?

Collagen (D) Signup and view all the answers