Cell Structure Quiz 3

What is the purpose of the extracellular matrix (ECM)?

• To maintain cell shape and prevent uptake of excess water

• To connect cells together into tissues

• To provide structural support and resist tensile forces

• To allow fast passage of ions and signaling molecules between cells

Which cytoskeletal element is responsible for maintaining cell shape and resisting compression forces?

• Microtubules

• Microfilaments

• Intermediate filaments

• Cell walls

What is the main function of microfilaments?

• Maintenance of cell shape

• Cell motility

• Chromosome movement

• Anchorage of nucleus and organelles

Which of the following is NOT a function of the endomembrane system?

• Protein synthesis

• Lipid synthesis

• Detoxification

• Cellular respiration

What is the structure of microtubules?

• Hollow tubes

• Two intertwined strands of actin

• Fibrous proteins coiled into tables

• Solid twisted chains of actin subunits

Which organelle is responsible for vesicle transport and cell division?

• Golgi apparatus

• Endoplasmic reticulum

• Lysosome

• Centrosome

What is the function of tight junctions?

• To create a seal and prevent leakage of extracellular fluid

• To connect adjacent cells and form sheets

• To allow fast passage of ions and signaling molecules

• To anchor cells to the cytoskeleton

What is the main function of intermediate filaments?

• Maintenance of cell shape

• Cell motility

• Chromosome movement

• Anchorage of nucleus and organelles

Which of the following is NOT a component of the extracellular matrix (ECM)?

• Collagen

• Proteoglycans

• Fibronectins

• Microtubules

What is the structure of microfilaments?

• Hollow tubes

• Two intertwined strands of actin

• Fibrous proteins coiled into tables

• Solid twisted chains of actin subunits