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Cytoskeleton
Question | Answer |
---|---|
-filamentous polymers of actin -~7nm diameter -flexible | Microfilaments |
-filamentous protein of tubulin - ~25nm -more rigid than microfilaments - form spindle during cell division | Microtubules |
-various protein subunits -~10mn diametre - stable length:less dynamic -provides strength and support | Intermediate Filaments |
Uses ATP hydrolysis to step along microtubules or microfilaments | Motor Proteins |
Travels along microfilaments: cell movement and contraction | Myosin |
Travels toward negative end of microtubules: vesicle / organelle transport / beating of flagella / cilia | Dynein |
Travels toward positive end of microtubules: vesicle / organelle transport | Kinesin |
Structure and support, intra cellular transport, spatial organisation, cellular motility | Cytoskeleton |
Dynamic Polymers of ∂ tubulin and ß tubulin heterodimers | Microtubules |