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Unformatted text preview: 12-2-09 Quiz 13
1. Which cell cycle stage does not have chromatids? a. G1 e. two of these b. G2 c. M d. S 2. The mitotic spindle is made of ____ that control movements of chromosomes, but cytokinesis is controlled by ___ . a. microfilaments, microtubules b. microtubules, microfilaments 3. The spindle apparatus during mitosis originates from the ___. a. chromosomes b. centromeres c. centrosomes d. centrioles e. asters 4. The cell cycle is regulated by the rise and fall in ___ concentration. a. cyclin b. Cdk 5. The cell cycle checkpoints we’ve studied are located at: a. M only b. S, G2, & M c. G1, G2, S & M d. G1, G2 & M e. G1 & G2 only 6. Centrosomes begin to move apart in animal cells during ____. a. anaphase b. metaphase c. telophase d. prophase e. interphase 7. All of the following occur during mitosis except the … a. condensing of chromosomes. b. uncoupling of chromatids at the centromere. c. formation of a spindle. d. synthesis of DNA. e. disappearance of the nuclear membrane. True (a) or False (b): 8. If there are 20 chromatids in a cell at metaphase, each daughter cell will have 20 chromosomes following cytokinesis.
9. The decline of MPF activity at the end of mitosis follows the decline of cyclin protein. 10. By the end of G2, both the amount of DNA and the number of chromosomes have doubled. Key: 1a, 2b, 3c, 4a, 5d, 6d, 7d, 8b, 9a, 10b ...
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This note was uploaded on 01/20/2010 for the course BIO 50415 taught by Professor Batterton during the Fall '09 term at University of Texas.
- Fall '09