Which of the following statements about the cytoskeleton is TRUE?
A) The cytoskeleton of eukaryotes is a static structure most resembling scaffolding used at construction sites.
B) Although microtubules are common within a cell, actin filaments are rarely found outside of the nucleus.
C) Movement of cilia and flagella is the result of motor proteins causing microtubules to move relative to each other.
D) Chemicals that block the assembly of the cytoskeleton would have little effect on a cell's response to external stimuli.
E) The cytoskeleton is produced by transport vesicles of the endomembrane system.

Question

Quizplus · Accepted Answer

Movement of cilia and flagella is indeed the result of motor proteins, known as dynein, which cause microtubules to move relative to each other. This generates a sliding force that powers the movement of cilia and flagella. The other options are incorrect. A is incorrect because the cytoskeleton of eukaryotes is a dynamic structure, constantly remodeling itself to fulfill a variety of functions. B is incorrect because actin filaments are the most abundant and widely distributed components of the cytoskeleton, found throughout the cell, not just inside the nucleus. D is incorrect because the cytoskeleton plays a crucial role in a cell's response to external stimuli, helping it to adapt and respond to changes in its environment. E is also incorrect because the cytoskeleton is not produced by transport vesicles, it is assembled within the cell from cytoskeletal proteins.

Which of the Following Statements About the Cytoskeleton Is TRUE