1.Colchicine is a type of drug that inhibits the microtubule formation during the cell division. Let’s say that the onion root tip (a place where most of the plant’s cells divide) was submerge in colchicine solution. a. How do you think will be the cell’s respond? Will it continue its cell division? Why or why not? b. Let’s say that the cells in onion root tip treated with colchicine were not halted at spindle checkpoint. What do you think will happen during the division?

1.Colchicine is a type of drug that inhibits the microtubule formation during the cell division. Let’s say that the onion root tip (a place where most of the plant’s cells divide) was submerge in colchicine solution. a. How do you think will be the cell’s respond? Will it continue its cell division? Why or why not? b. Let’s say that the cells in onion root tip treated with colchicine were not halted at spindle checkpoint. What do you think will happen during the division?

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter10: Cell Division And Mitosis

Section: Chapter Questions

Problem 2ITD

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In the mitosis experiment, in what stage were most of the onion root tip cells in? Based on what you know about cell cycle division, what does this imply about the life span of a cell? Were there any stages of the cell cycle that you did not observe? How can you explain this using evidence from the cell cycle?
Which of the following statements about cell cycle regulators is incorrect? a. The concentrations of cyclins change throughout the cell cycle. b. Cyclins are present in all stages of the cell cycle except S. c. Cyclin-Cdk complexes phosphorylate target proteins. d. Cdks combine with cyclin to move the cycle into mitosis. e. During anaphase of mitosis, cyclin is degraded, allowing mitosis to end.
Biologists have long been interested in the effects of radiation on cells. In one experiment, researchers examined the effect of radium on mitosis of chick embryo cells growing in culture. A population of experimental cells was examined under the microscope for the number of cells in telophase (as a measure of mitosis occurring) before, during, and after exposure to radium. The results are shown in the Figure. What is the effect of radium exposure on mitosis? Source: R. G. Canti and M. Donaldson. 1926. The effect of radium on mitosis in vitro. Proceedings of the Royal Society of London, Series B, Containing Papers of a Biological Character 100:413419.
Chemotherapy utilizes chemicals to interrupt various parts of the cell cycle, targeting rapidly growing cells. Taxol® is an example of a drug that prevents mitosis phase from occurring. How this Taxol useful as a cancer treatment and how might targeting rapidly growing cells explain common chemotherapy side effects such as hair loss and nausea? A. Taxol will stop the tumor from growing, but unfortunately it also impacts other fast-growing cells (like hair follicles and stomach lining cells), so normal cells get damaged as well. B. Taxol will stop the tumor from continuing to divide, but unfortunately it also impacts other readily dividing cells (like hair follicles and stomach lining cells), so normal cells get damaged as well. C. Taxol will stop the tumor from copying DNA, but unfortunately it also impacts DNA replication in other cells (like hair follicles and stomach lining cells), so normal cells don't get to continue through…
Some cells in your body frequently divide, while others in your body rarely, if ever, divide. a. What type of cell frequently divides? b. What type of cell infrequently divides? c. How would the two cells differ in their interphase?
1. Which of the following is NOT an importance of mitosis? a.It facilitates growth of single fertilized egg to an individual. b.It heals wounds and replaces damaged or lost organs through regeneration c.It ensures equal distribution of nucleic material down to each daughter cell. d.It produces new chromosome combinations. 2. Why are cell cycle control points are so important? a.They help prevent cells with damaged DNA from dividing b.They determine how quickly a cell’s DNA gets copied c.They ensure that mitosis occurs continuously in all body cells d.They ensure that metaphase always follow anaphase
1. Which of the following is NOT an importance of mitosis? a.It facilitates growth of single fertilized egg to an individual. b.It heals wounds and replaces damaged or lost organs through regeneration c.It ensures equal distribution of nucleic material down to each daughter cell. d.It produces new chromosome combinations. 2. Why are cell cycle control points are so important? a.They help prevent cells with damaged DNA from dividing b.They determine how quickly a cell’s DNA gets copied c.They ensure that mitosis occurs continuously in all body cells d.They ensure that metaphase always follow anaphase 3. Which component of the plasma membrane allows the immune system to differentiate between body cells and foreign cells or tissues? a.integral proteins b.carbohydrates c.cholesterol d.peripheral proteins e.phospholipids 4. Cyanide is a chemical that affects the function of mitochondria affecting the energy processing of…
Which of the following statements correctly identifies the difference between plant and animal cell division? Select one: a. The cell walls of plants prevent the process of cytokinesis. b. Plants cells lack centrioles, and they form a cell plate during cytokinesis. c. Both plant and animal cells undergo mitosis and cytokinesis, but they lack the interphase. d. Plant cells lack centromeres, and they form a cell wall to produce two daughter cells.
1. Which of the following describe the nuclear envelope? a. It is continuous with the endomembrane system b. It is continuous with the nucleolus c. It is continuous with the cell membrane d. It contains a cell membrane 2. During the cell cycle, when are chromosomes partitioned to daughter cells? a. G1 phase c. M phase b. G2 phase d. S phase 3. How do cancer cells differ from normal cells? a. invasiveness only – many normal cell types grow in an uncontrolled fashion b. interphase and M phase c. uncontrolled division and invasiveness d. uncontrolled division only – many normal cell types are invasive
Why is a rapidly growing tissue, such as the root tip of a plant, a good model for studying the effects of a drug on cell division?
As you know, cells in our body are constantly dividing. What are the 3 ways that cells use to make sure the complicated process of cellular division is proceeding correctly. When does each happen and what does the cell do once it detects a problem?
1. How do the daughter cells formed by mitosis compare genetically to each other? 2. How would you expect the mitotic index of a cancer tissue to compare with that of the onion root tip?