Exam 3 with Answer Key | Cell Biology | PCB 4023, Exams of Cell Biology

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In which direction and along what cytoskeletal element are they seen to move? 2,0) toward the plus end of the intermediate filament toward the minus end of the miCtofilament a toward the minus end of the microtubule 4 +d) toward the plus end of the microfilament Le d do Otubules - 2. The outer microtubules in a uM are generated directly from microtubules in a(n) - c) centriol ' b> d) centrosomes e) cilium 3. What term refers to the fact that growing and shrinking microtubules can coexist in the same cell region and that a given microtubule can switch back and forth between growing and shortening? i! Microscopic beads are coated with kinesin and subjected to an in vitro mobility assay. f dynamic tension | ‘ amic instability | f . | ¥ ¢) dynamic stability 4 > a d) dynamism : : e) transferability 4, Individual monomers within a microfilament move down the length of the microfilament from the plus end to the minus end in a process known as ~~ a) transposition g ». b) walking § a i admilling - a extradition , = e) trans-crossing + §. Along which structure do membranous vesicles and organelles typically engage in local movement in the cell periphery of an animal cell? mitochondria F : \ icrotubul ea A Dricrofiamen S o ~_* , if i * , d) intermediate filaments » e) vimentin filaments o W Dee for the decrease in the length of an entire muscle? the combined shortening of only thin filaments or : hci — Fi | b) the combined shortening of actin heads SP », c) the combined shortening myosin tails aed on sumoerss s length a 7 r we ¥ ; e) the contraction of transverse tubes _ eS ¥ 7. What protein is thought to prevent the sarcomere from being pulled apart during muscle stretching and maintain the myosin filaments in their proper position in the center of the sarcomere during muscle contraction? Le | - ) actinin , ~ 1 c) nebulin -. owe | > d) tropomyosin ee e) troponin ? ?