Question
80. Of the three types of cytoskeletal filaments, which is/are the strongest and the most stable? A. Microfilaments B. Microtubules C. Intermediate filaments D. A and B E. All of the above.
Answer
4.3
(154 Votes)
Lucinda
Elite · Tutor for 8 years
Answer
C
Explanation
## Step 1:The question is testing the knowledge of the cell's internal structure, specifically the cytoskeleton. The cytoskeleton is a network of fibers that fills the cell and assists in its movement, structure, and organelle transport. There are three types of fibers: microtubules, intermediate filaments, and microfilaments.## Step 2:(A) Microfilaments are two-chain intertwined strands that function in cellular mobility and in the contraction of muscle cells. They are not the strongest or most stable of the three.## Step 3:(B) Microtubules are hollow rods that function primarily to help support and shape the cell and also function as tracks that guide intracellular protein movements. They are not the strongest or most stable of the three.## Step 4:(C) Intermediate filaments are rugged and tough and they provide the tensile strength for cells to withstand tension and maintain shape. Thus, they are the strongest and most stable of the three.## Step 5:(D) The statement that both microfilaments and microtubules are the strongest and most stable is incorrect because, as explained above, intermediate filaments are the strongest and most stable.## Step 6:(E) The statement that all three types of filaments are the strongest and most stable is incorrect because, as explained above, intermediate filaments are the strongest and most stable.