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27-For both actin and microtubule filaments, nucleotide hy drolysis is important for a. Stabilizing the filaments once they are formed b. Increasing the rate at which subunits are added to the filaments c. Promoting nucleation of filaments d. Decreasing e. All of the above. 28- A cargo that is moving on a microtubule is probubly bound to a a. Dynein b. Kinesin. c. Myosin d. a and b e. All of the above. 29- A microtubule-bound cargo that is moving away from the MTOC is probably bound toa a. Dynein. b. Kinesin. c. Myosin. d. a and b. All of the above. 30- A cargo that is moving along a microfilament is probably hound to a a. Dynein b. Kinesin c. Myosin. d. a and b e. All of the above aus 31-in cilia flagella, dynein produces a bending ?stad of a sliding movement It is a minus end-bounded motor protein b. It does not hy drolyze ATP c. Microtubules are cross-linked in cilia and flagella d. Cilia and flagellia contain both actin and microtubules e. All of the above. 2- Which of the following phenomena is (are) required for cellular crawling? a Myosin-mediated contraction at the rear of the moving cell. b. Integrin association with the extracellular matris c. Formation of branched actin filaments d. Formation of focal adhesions e. All of the above 33- According to the sliding-filament model of muscle contraction, the sarcomere shortens because a. Actin filaments shorten. h. Myosin filaments shorten c. The Z line disappears. d. Myosin causes two adjacent Z lines to move closer to each other as actin filaments slide. Kinesin causes myosin and actin filaments to move toward each other. 0O0 Show transcribed image text
27-For both actin and microtubule filaments, nucleotide hy drolysis is important for a. Stabilizing the filaments once they are formed b. Increasing the rate at which subunits are added to the filaments c. Promoting nucleation of filaments d. Decreasing e. All of the above. 28- A cargo that is moving on a microtubule is probubly bound to a a. Dynein b. Kinesin. c. Myosin d. a and b e. All of the above. 29- A microtubule-bound cargo that is moving away from the MTOC is probably bound toa a. Dynein. b. Kinesin. c. Myosin. d. a and b. All of the above. 30- A cargo that is moving along a microfilament is probably hound to a a. Dynein b. Kinesin c. Myosin. d. a and b e. All of the above aus 31-in cilia flagella, dynein produces a bending ?stad of a sliding movement It is a minus end-bounded motor protein b. It does not hy drolyze ATP c. Microtubules are cross-linked in cilia and flagella d. Cilia and flagellia contain both actin and microtubules e. All of the above. 2- Which of the following phenomena is (are) required for cellular crawling? a Myosin-mediated contraction at the rear of the moving cell. b. Integrin association with the extracellular matris c. Formation of branched actin filaments d. Formation of focal adhesions e. All of the above 33- According to the sliding-filament model of muscle contraction, the sarcomere shortens because a. Actin filaments shorten. h. Myosin filaments shorten c. The Z line disappears. d. Myosin causes two adjacent Z lines to move closer to each other as actin filaments slide. Kinesin causes myosin and actin filaments to move toward each other. 0O0
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