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AP Cell Cycle and Genetics Test Corrections
7. D B
Golgi-derived vesicles are primary responsible for the cytokinesis in plant cells but not in animal cells because the Golgi-derived vesicles are only present in the plant cell.
8. C D
Preventing the shortening of the microtubules will cause the movement of the chromosomes during the anaphase because anaphase involves the separation of the sister chromatids at the centromeres via the shortening of the spindle fibers.
9. B D
During the S phase the cell is replicating an therefore the number of the picograms is doubled. During the G2 phase only the size of the cell increases but not the actual number of the picograms.
10. B D
THe chromosomes are "reeled in" by the shortening of spindle microtubules, and motor proteins of the kinetochores move by chromosomes along the spindle microtubules.
12. D A
PDGF is released by platelets in the vicinity of an injury because PDGF is a platelet derived growth factor
13. E D
Cyclin is a protein synthesized at specific times during the cell cycle that associates with a kinase to from a catholically active complex because cyclin combines tot eh kinase to combine to the cdk.
14. C E
CDK is the protein maintained at a constant levels throughout the cell cycle that requires cyclin to become catholically active.
15. E B
The MPF tigers the cell's passage past the G2 checkpoint into mitosis because it recognizes it and the it either allows it to leave the G2 checkpoint or it sends it to the G0 checkpoint,
16. A B
As cells become more numerous, the cell surface proteins of one cell contact the adjoining cells and they stop dividing. That is what the density-dependent inhibition is explained.
17. B C
Besides the ability of some cancer cells to over proliferate, there also could be a lack of the appropriate cell death in the tumor which would not cause the cells to divide unstopidly and therefore the cancer
7. D B
Golgi-derived vesicles are primary responsible for the cytokinesis in plant cells but not in animal cells because the Golgi-derived vesicles are only present in the plant cell.
8. C D
Preventing the shortening of the microtubules will cause the movement of the chromosomes during the anaphase because anaphase involves the separation of the sister chromatids at the centromeres via the shortening of the spindle fibers.
9. B D
During the S phase the cell is replicating an therefore the number of the picograms is doubled. During the G2 phase only the size of the cell increases but not the actual number of the picograms.
10. B D
THe chromosomes are "reeled in" by the shortening of spindle microtubules, and motor proteins of the kinetochores move by chromosomes along the spindle microtubules.
12. D A
PDGF is released by platelets in the vicinity of an injury because PDGF is a platelet derived growth factor
13. E D
Cyclin is a protein synthesized at specific times during the cell cycle that associates with a kinase to from a catholically active complex because cyclin combines tot eh kinase to combine to the cdk.
14. C E
CDK is the protein maintained at a constant levels throughout the cell cycle that requires cyclin to become catholically active.
15. E B
The MPF tigers the cell's passage past the G2 checkpoint into mitosis because it recognizes it and the it either allows it to leave the G2 checkpoint or it sends it to the G0 checkpoint,
16. A B
As cells become more numerous, the cell surface proteins of one cell contact the adjoining cells and they stop dividing. That is what the density-dependent inhibition is explained.
17. B C
Besides the ability of some cancer cells to over proliferate, there also could be a lack of the appropriate cell death in the tumor which would not cause the cells to divide unstopidly and therefore the cancer