A protein was recently discovered to be located in the nucleus. However, it is uncertain whether this is a protein that permanently stays in the nucleus or a shuttling protein that stays most of the time in the nucleus. One way to resolve this question is to perform the following steps: • Fuse the cells expressing the fluorescently labeled protein in their nucleus with the cells that are not expressing it. • Treat the cells with an inhibitor of protein synthesis to prevent the synthesis of more labeled proteins. • Observe for fluorescence in the fused cell with two nuclei. c. Why is it important to stop the synthesis of more of the labeled proteins?

A protein was recently discovered to be located in the nucleus. However, it is uncertain whether this is a protein that permanently stays in the nucleus or a shuttling protein that stays most of the time in the nucleus. One way to resolve this question is to perform the following steps: • Fuse the cells expressing the fluorescently labeled protein in their nucleus with the cells that are not expressing it. • Treat the cells with an inhibitor of protein synthesis to prevent the synthesis of more labeled proteins. • Observe for fluorescence in the fused cell with two nuclei. c. Why is it important to stop the synthesis of more of the labeled proteins?

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 1ITD: Biologists have long been interested in the effects of radiation on cells. In one experiment,...

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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.
When the DNA of a human cell becomes damaged, the p53 geneis activated. What is the general function of the p53 protein?Is it an enzyme, transcription factor, cell-cycle protein, orsomething else? Describe three ways in which the synthesisof the p53 protein affects cellular function. Why is it beneficialfor these three things to happen when a cell’s DNA hasbeen damaged?
What types of genetic activities occur during interphase? Explainwhy these activities cannot occur during M phase.
Describe the main types of large-scale structural changes inchromosomes, and explain their potential consequences
The cisternal space of ER is continuous with prenuclear space between the two membranes of the nuclear envelope and can communicate with the internals spaces of the Golgi complex and lysosome by means of _____________ that shuttle between these structures. Which of the following experimental observations would suggest that chromosomes move by polymerization of tubulin subunits?
In other words, the master regulator initiates a program of gene expression that narrow the potential fates of the precursor's cells’ descendants to the type of cells that participate in the organ’s function. Question: Once a master regulator gene is turned on in some cells and not in others, how do cells “remember” that pattern through all the cell division that occur to form a specific organ?
Thousands of caspase substrateshave been identified. Which onesare the critical proteins that mustbe cleaved to trigger the majorcell remodeling events underlyingapoptosis?
Describe the organization of the interphase nucleus. Include inyour presentation a description of chromosome territories andinterchromatin compartments ?
What is unique about the translocation of ER proteins into the ER lumen vs. the translocation of proteins across other organelle membranes?
Proteins like channels embedded within the cell's plasma membrane and enzymes scattered in the cytoplasm carry out vital functions. Can you explain the steps of the biological process, allowing cells to make proteins from genes? Can you please provide as many details to each step?
Briefly describe a summary of the flow of genetic information in cells with diagram.
Explain how the specializations for M-phase function prevents the activities of Interphase, particularly Gap1.