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SCIENTIFIC INQUIRY Although both ends of a microtubule can gain or lose subunits, one end (called the plus end)
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- Actin filaments and microtubules are similar with respect to each of the following EXCEPT: inherent polarity with plus and minus ends growth requires an organizing center association with motor proteins both are polymers of subunits regular remodelingarrow_forwardMatch each term with its best description. ___ cell plate a. lump of cells ___ spindle b. made of microfilaments ___ tumor c. divide plant cells ___ cleavage furrow d. spindle originates here ___ contractile ring e. dangerous metastatic cells ___ cancer f. made of microtubules ___ centrosomes g. indentation ___ telomere h. shortens with agearrow_forwardWhich of the following properties are shared by desmosomes and hemidesmosomes? Select all that apply. They both are protein structures found in eukaryotic cells They both bind extracellular matrix proteins They both bind to intermediate filaments They both bind to acti filamentsarrow_forward
- The subunits of which filament bind to GTP, a condition that favors the polymerization of the cytoskeletal subunits? O Intermediate filaments Microfilaments O Microtubulesarrow_forwardWhat is the function of the nuclear matrix?arrow_forwardScientists often extract DNA from the nucleus of cells for analysis or use. This process breaks the cell membrane, spins the solution to remove the large particles through high g-force, adds alcohol to make the DNA less soluble aqueous solution, then spins the solution again to pull the DNA out of solution. Consider a cell in metaphase compared to a cell in rest (not in the cell cycle leading to cell division). What properties of a metaphase cell might let you extract more DNA compared to the resting cell? Are there any that might make the extraction more difficult?arrow_forward
- Integrins are important in cell crawling because they anchor the leading edge of the cell to the surface it is moving over they are receptors for diffusible chemical ligands that determine the direction the cell will move in they cross-link actin filaments to microtubules and intermediate filaments of the cytoskeleton they serve as nucleating sites for polymerization of new actin filamentsarrow_forwardMicrotubules within a cell appear to be arranged in specific arrays. What cellular structure is responsible for determining the arrangement of microtubules within a cell? How many of these structures are found in a typical cell? Describe how such structures serve to nucleate microtubule assembly.arrow_forwardA useful technique for studying microtubule motors is to attach them by their tails to a glass coverslip (which can be accomplished quite easily because the tails stick avidly to a clean glass surface) and then allow them to settle. The microtubules may then be viewed in a light microscope as they are propelled over the surface of the coverslip by the heads of the motor proteins. Because the motor proteins attach at random orientations to the coverslip, however, how can they generate coordinated movement of individual microtubules rather than engaging in a tug-of-war? In which direction will microtubules crawl on a ‘bed’ of kinesin molecules (i.e., will they move plus-end first, or minus-end first)?arrow_forward
- Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax