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Using which of the following techniques would enable your lab group to distinguish between a cell in G2 and a cell from the same organism in G1
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What is true of all cancers
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Using which of the following techniques would enable your lab group to distinguish between a cell in G2 and a cell from the same organism in G1 • Radioactive-labeled nucleotides
What is true of all cancers • They have escaped normal cell cycle controls
7. How do cancer cells differ from normal cells • Cancer cells may be immortal
8. The cell cycle control systems of cancer cells differ from those of normal cells. Select the best explanation for this fact • Genetic changes alter the function of the cancers cell's protein products
9. If a eukaryotic cell is in the G1 phase of the cell cycle, which statement about the cell's chromosomes must be correct • Each chromosome is made of a complex of DNA and associated proteins
10. Which statement provides the best description of the interphase portion of the cell cycle • During interphase, a cell is metabolically active
11. Starting with a fertilized egg (zygote), a series of five cell divisions would produce an early embryo with a how many cells • 32
12. If there are 20 chromatids in a cell, how many centromeres are there? • 20
13. At which phase are centrioles beginning to move apart in animal cells • Prophase
14. If there are 20 centromeres in a cell at anaphase, how many chromosomes are there in each daughter cell following cytokinesis • 10
15. Measurements of the amount of DNA per nucleus were taken on a large number of cells from a growing fungus. The measured DNA levels ranged from 3 to 6 picograms per nucleus. In which stage of the cell cycle did the nucleus contain 6 picograms of DNA • G2
• A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 8 pictograms of DNA per nucleus. How many picograms would be found at the end of S and the end of G2 • 16; 16
17. What is a cleavage furrow • A groove in the plasma membrane between daughter nuclei
19. A plant-derived protein known as colchicine can be used by blocking the formation of the spindle. Which of the following would result in colchicine is added to a sample of cells in G2 • The chromosomes would coil and shorten but have no spindle to which to attach
26. These protists are intermediate in what sense • They maintain a nuclear envelope during division
27. What is the most probable hypothesis about these intermediate forms of cell division • They show some but not all of the evolutionary steps toward complete mitosis
28. Where do the microtubules of the spindle originate during mitosis in animal cells • Centrosome
30. Which of the following are primarily responsible for cytokinesis in plant cells but not animal cells • Golgi-Derived Vesicles
31. Movement of the chromosomes during anaphase would be most affected by a drug that prevents • Shortening of microtubules
32. During which phase of mitosis do the chromatids become chromosomes • Anaphase
33. Which of the following is release by platelets in the vicinity of an injury • PDGF
34. Which of the following is a protein synthesized at specific times during the cell cycle that associated with a kinase to form a catalytically active complex • Cyclin
35. Which of the following is a protein maintained at constant levels throughout the cell cycle that requires cyclin to become catalytically active • Cdk
36. Which of the following triggers the cell's passage past the G2 checkpoint into mitosis • MPF
37. The cyclin component of MPF is destroyed toward the end of which phase • M
38. The MPF protein complex turns itself off by • Activating a process that destroys cyclin components
39. Density-dependent inhibition is explained by which of the following • As cells become more numerous, the cell surface proteins of one cell contact the adjoining cells and they stop dividing
40. Which of the following is true concerning cancer cells • When they stop dividing, they do so at random points in the cell cycle; they are not subject to cell cycle controls; and they do not exhibit density- dependent inhibition when growing in culture
41. Which of the following describe(s) cyclin-dependent kinase (Cdk) • Cdk is present throughout the cell cycle and is an enzyme that attaches phosphate groups to other proteins
42. Why do neurons and some other specialized cells divide infrequently? • They have been shunted into G0
43. Which of the following most accurately describes a cyclin • It activates a Cdk molecule when it is in sufficient concentration
44. At the M phase checkpoint, the complex allows for what to occur • Separase enzyme cleaves cohesions and allows chromatids to separate
45. A research team began a study of a cultured cell line. Their primary observations showed them that the cell line did not exhibit either destiny-dependent inhibition or anchorage dependence. What could they conclude right away • The cells showed characteristics of tumors
46. For a chemotherapeutic drug to be useful for treating cancer cells, which of the following is most desirable • It interferes with rapidly dividing cells
47. You have a series of cells, all of which were derived from tumor, and you first need to find out which ones are malignant. What could you do • Karyotype samples to look for unusual size and number of chromosomes
49. Proteins that are involved in the regulation of the cell cycle, and that show fluctuations in concentration during the cell cycle, are called • Cyclins
50. besides the ability of some cancer cells to overproliferate, what else could logically result in a tumor • Lack of appropriate cell death
51. All cell cycle checkpoints are similar in which way • They give the go-ahead signal to progress to the next checkpoint
52. Anchorage dependence of animal cells in vitro or in vivo depends on which of the following? • Response of the cell cycle controls to signals from the plasma membrane
Created by: Allie58
 

 



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