8. Cell radiosensitivity depends on the part of the cell cycle cell is in. The most sensitive phase is: a. G₂ phase b. late S phase c. mid-S phase d. Mitosis plus late G₁ and early S phase e. the whole interphase 9. Interphase death affects cells at lower dose compared to other cells: a. cells that are not highly mitotic b. cells that are highly mitotic 10. Which of the acute radiation syndromes is threshold dose dependent? a. bone marrow syndrome b. hemopoietic syndrome d. nervous system syndrome e. all of the above 11. What is the estimated SED 50 for humans? c. gastrointestinal syndrome a. 250-400 Rads b. 600 R c. 1,000 R d. 10,000 R e. above 10,000 R

8. Cell radiosensitivity depends on the part of the cell cycle cell is in. The most sensitive phase is: a. G₂ phase b. late S phase c. mid-S phase d. Mitosis plus late G₁ and early S phase e. the whole interphase 9. Interphase death affects cells at lower dose compared to other cells: a. cells that are not highly mitotic b. cells that are highly mitotic 10. Which of the acute radiation syndromes is threshold dose dependent? a. bone marrow syndrome b. hemopoietic syndrome d. nervous system syndrome e. all of the above 11. What is the estimated SED 50 for humans? c. gastrointestinal syndrome a. 250-400 Rads b. 600 R c. 1,000 R d. 10,000 R e. above 10,000 R

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 8TYK: Which of the following statements about cell cycle regulators is incorrect? a. The concentrations of...

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A tumor suppressor protein, p21, inhibits Cdk1. The earliest effect p21 on the cell cycle would be to stop the cell cycle at: a. early G1. b. late G1. c. the S phase. d. G2. e. the mitotic prophase.
1. A defective white blood cell does not complete the process of DNA replication. Which of the following is most likely to occur during the cell cycle for this cell? a. The white blood cell will be stopped at the G1 checkpoint and sent to the G0. b. The G2 checkpoint will stop the cell from continuing in the cell cycle. c. The white blood cell will get stuck at the spindle checkpoint. d.The cell will continue on to cytokinesis. 2. Which of the following statements describes how the RNA sequence specifies the production of an amino acid chain? a. Each set of three bases codes for an RNA molecule that specifies the anticodon. b. Each set of three bases codes for a single amino acid. c. Each base codes for one amino acid. d. Each group of three bases codes for an enzyme that binds amino acids together. 3. What will most likely happen when the -35 element and pribnow box are mutated? a. RNA Polymerase II will not be able to bind to the promoter region. b. Prokaryotic RNA…
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…
2. Explain what the cell is doing in each of the following stages of the cell cycle.a) G1, b) S, c) G2, d) M
3) Examine the graph showing the relative percentage normal and cancer cells spend in various stages of the cell cycle. Based on the information in the graphs, infer how cancer cells differ from typical, noncancerous cells. Select ALL that apply. A) Cancer cells do not replicate their DNA. B) Cancer cells replicate their DNA too quickly. C) Cancer cells do not go through interphase during their cell cycle. D) Cancer cells spend more time dividing compared to typical cells. E) Cancer cells do not always grow to the same size as typical cells. more than 1 answer. not graded
Which of the following is not a characteristic of cancer cells? a. less cytoplasmic volume than normal cells b. an absence of cyclin c. loss of adhesion to other cells d. loss of control of cell division e. loss of normal control of G1/S phase transition
The failure of chromosomes to separate normally during cell division is called (a) a fragile site (b) an inborn error of metabolism (c) a satellite knob (d) a translocation (e) nondisjunction
Which of the following is not true of somatic cell gene therapy? a. White blood cells can be used. b. Somatic cells are cultured, and the desired DNA is introduced into them. c. Cells with the introduced DNA are returned to the body. d. The technique is still very experimental. e. The inserted genes are passed to the offspring.
Figure 28.11 depicts the eukaryotic cell cycle. Many cell types â€œexitâ€� the cell cycle and donâ€™t divide for prolonged periods, a state termedG0; some, for example neurons, never divide again. a. In what stage of the cell cycle do you suppose a cell might be when it exits the cell cycle and enters G0? b. The cell cycle is controlled by checkpoints, cyclins, and CDKs. Describe how biochemical events involving cyclins and CDKs might control passage of a dividing cell through the cell cycle.
1. What is apoptosis? What is its purpose? 2. What are cell cycle regulators? 3. What happens if cell cycle regulators don’t function properly?
Part A and B A. What is the normal function of the Rb protein? A) Rb prevents the cell cycle from proceeding unless the cell is prepared to do so B) Rb causes cells to undergo apoptosis C) Rb promotes Cdk activation D) Each of the other selections is true E) Rb repairs damaged DNA B. How do tumors arise? A) When cell proliferation occurs at a higher rate than cell death B) When someone is infected with a tumor from another person C) When cell death occurs at a very high rate D) When cell proliferation occurs at a very low rate