The microtubules and microfilaments of the cytoskeleton are dynamic polymers that are subject to shortening， lengthening， disassembly， and reassembly.（ ）
The microtubules and microfilaments of the cytoskeleton are dynamic polymers that are subject to shortening， lengthening， disassembly， and reassembly.（ ）
The nucleation of microtubules in vivo occurs in association with a variety of MTOCs (microtubule organizing centers) in animal cells.
The nucleation of microtubules in vivo occurs in association with a variety of MTOCs (microtubule organizing centers) in animal cells.
Which of the following descriptions about anaphase is CORRECT?() A: The<br/>kinetochore microtubules are shortened by de-polymerization B: Microtubules<br/>attach to kinetochore of chromosomes C: The<br/>separated chromatids move to opposite spindle poles D: The<br/>shape of cell is stretched during the latter part of anaphase
Which of the following descriptions about anaphase is CORRECT?() A: The<br/>kinetochore microtubules are shortened by de-polymerization B: Microtubules<br/>attach to kinetochore of chromosomes C: The<br/>separated chromatids move to opposite spindle poles D: The<br/>shape of cell is stretched during the latter part of anaphase
The<br/>pattern of the microtubules seen from the cross section of centriole<br/>is () . A: 9+1 B: 9+3 C: 9+2 D: 9+0
The<br/>pattern of the microtubules seen from the cross section of centriole<br/>is () . A: 9+1 B: 9+3 C: 9+2 D: 9+0
The drug taxol acts to A: block microtubule assembly B: stabilizes microtubule against depolymerization. C: promote cell division D: sever microtubules
The drug taxol acts to A: block microtubule assembly B: stabilizes microtubule against depolymerization. C: promote cell division D: sever microtubules