OSSF Cytoskeletal proteins Practice Questions and Answers |100% Pass
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Module
2024/2025
Institution
2024/2025
OSSF Cytoskeletal proteins Practice
Questions and Answers |100% Pass
What are the 3 primary types of protein filamanets? - Answer-Actin microfilaments, intermediate
filaments, microtubules
What is the thinnest, most flexible component of the cytoskeleton? - Answer-Actin filaments
What are acti...
The binding of subunits causes hydrolysis of ATP (actin) or GTP (microtubules) and decreases the
strength of binding causing... - Answer✔✔-Dynamic instability
Which end do the ATP/ GTP molecules dissociate from? - Answer✔✔-Minus end
What provides a stronger, stable actin structure? - Answer✔✔-Bundling proteins together
What regulates shape and number of actin filaments and microtubules through altering the number of
regulatory proteins? - Answer✔✔-Nucleus
What acts as a scaffold for myosin (motor protein) in muscle cells and helps with vesicle movements? -
Answer✔✔-Actin filaments
What are apical cell membrane projections that increase SA? - Answer✔✔-Microvilli
What are microvilli supported by? - Answer✔✔-Actin bundles- in the core and anchored to terminal web
of actin at the base
What produces cellular contraction (and cellular movement) by sliding actin filaments in opposite
directions and hydrolyzing ATP in the process? - Answer✔✔-Myosin
What are the 4 main functions of microtubules in the cell? - Answer✔✔-Mitotic spindle, cilia and
flagella, anchor organelles, motor proteins (dynein and kinesin) move vesicles along
What are the sites that localize microtubule minus ends? - Answer✔✔-Microtubule organizing centers
(MTOC)
What is used by all cells for generating the mitotic spindle during mitosis and meiosis? - Answer✔✔-
Centrosome
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