For each of the following, decide whether it applies to actin filaments, intermediate filaments, and/or microtubules. NOTE: there may be multiple answers for each statement. A. Found in the nucleus and cytoplasm B. Involved in the transport of vesicles and organelles C. Associate with proteins that help adhere cells to the extracellular matrix D. Their stability is influenced by nucleotide hydrolysis E. Directly involved in phagocytosis F. Can associate into bundles with the help of other proteins.
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Classify each characteristic based on whether it describes actin filaments, intermediate filaments, and/or microtubules. Some characteristics may apply to more than one category. Primarily associated with movement Involved in cell division Protein composition varies from cell to cell Take part in formation of cell-to-cell junctions Support the plasma membrane Act as tracks along which organelles can move Short, cylindrical structures composed of 13 rows of tubulin Colchicine binds these fibers to block cell division The proteins of this fiber interact with myosin during muscle contraction Support the nuclear envelope Actin filaments Intermediate filaments Microtubules
Parul N.
1. Does not form by polymerization of a particular subunit: 2. Found in cilia and flagella: 3. Important for maintaining cell shape: 4. Found only in mitochondria: 5. Made of actin subunits: 6. Made of tubulin subunits: 7. Is tissue-specific: 8. Forms spindle fibers in mitosis: 9. Important in muscle contraction: 10. Is made of carbohydrates: 11. Associates with kinesin and dynein motor proteins: 12. Associates with Myosin motor proteins:
Syed A.
Which of the following do not play a role in intracellular movement? a. microfilaments and intermediate filaments b. microfilaments and microtubules c. intermediate filaments and microtubules d. only intermediate filaments
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