Which of the following cytoskeletal elements are known to associate with A) Acti

Question

Which of the following cytoskeletal elements are known to associate with A) Actin B) Microtubules C) Intermediate Filaments D) All of the above The extension of a by a migrating cell depends on which of the following? A) Addition of actin monomers at the plus end of actin filaments B) Formation of branched actin filaments by Arp2/3 C) Disassembly of actin monomers at the minus end of actin filaments D) All of the above Which of the following statements about microtubule motor proteins is false? A) The globular head of dynein binds microcubules B) Kinesin mediates transport towards the minus end of microtubules C) The coiled-coil tail of kinesin binds the cargo to be transported D) Dynein is an ATPase that hydrolyzes ATP to ADP The Arp2/3 complex mediates which of the following roles? A) It crosslinks actin B) It severs actin C) It nucleates actin D) It bundles actin Which of the following statements about microtubule growth is false? A) microtubule growth

Explanation / Answer

3. Intermediate filaments

In Desmosomes the Inner Dense Plaque where desmoplakin binds the intermediate filaments of the cell.

4. Formation of Branched ARP2/3

Arp2/3 complexes are present at microfilament-microfilament junctions in lamellipodia

5.Kinesin mediates transport towards the minus end of microtubules

6.Crosslinks actin; nucleates actin

7. The minus ends of most of the microtubules anchored at the centrosome

The minus ends of the microtubules  terminate in the cytoplasm of the axon

8.Actin and Myosins

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