Intermediate filaments
A)lack the intrinsic polarity of microtubules and microfilaments,because IF tetrameric subunits are symmetric.
B)are grouped into five cytoplasmic classes based on the cell types in which they are found and one nuclear class.
C)are the most stable and least soluble cytoskeleton filaments.
D)are not found in plant cell cytoplasm.
E)All of the above are true.

Question

Quizplus · Accepted Answer

Intermediate filaments (IFs) indeed lack the intrinsic polarity found in microtubules and microfilaments due to the symmetric nature of their tetrameric subunits. They are categorized into five cytoplasmic classes based on cell type specificity and one nuclear class, highlighting their diverse roles in different cellular contexts. Among the cytoskeletal filaments, IFs are known for their stability and insolubility, which is crucial for their function in providing structural support and resistance to stress. Additionally, IFs are not present in the cytoplasm of plant cells, which instead rely on other cytoskeletal components for structural integrity and intracellular transport.

Intermediate Filaments