Animal and plant cell prophase similarity? Animal and plant cell Metaphase similarity? Animal and plant cell Anaphase similarity? Animal and plant cell Telophase similarity? 1. Explain why we used these particular cells to map the phases of mitosis (Whitefish blastula and Onion Root Tip). Why do these cells best demonstrate the phases of mitosis?

Animal and plant cell prophase similarity? Animal and plant cell Metaphase similarity? Animal and plant cell Anaphase similarity? Animal and plant cell Telophase similarity? 1. Explain why we used these particular cells to map the phases of mitosis (Whitefish blastula and Onion Root Tip). Why do these cells best demonstrate the phases of mitosis?

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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Comparing Mitosis and Meiosis: How many cells at the end? The ploidy of the end cells? The purpose of the process (when is it used)? The differences in the steps of each process (eg - how are metaphase, metaphase I, and metaphase II different)?
Give 4 similarities and 4 differences between the condensation of DNA during mitosis and the folding of proteins in the cytosol.
Dynamic instability causes microtubules either to grow or to shrink rapidly. Consider an individual microtubule that is in its shrinking phase. What would need to happen at the end of the microtubule in order for it to stop shrinking and to start growing again? Be specific! What would happen if only GDP, but no GTP, were present in the solution? What would happen if the solution contained an analog of GTP that cannot be hydrolyzed?
Which statements are true? Explain why or why not.1 Since there are about 1013 cells in an adult human,and about 1010 cells die and are replaced each day, webecome new people every three years.2 In order for proliferating cells to maintain a rela-tively constant size, the length of the cell cycle must matchthe time it takes for the cell to double in size.3 While other proteins come and go during thecell cycle, the proteins of the origin recognition complexremain bound to the DNA throughout.4 Chromosomes are positioned on the metaphaseplate by equal and opposite forces that pull them towardthe two poles of the spindle.5 Meiosis segregates the paternal homologs intosperm and the maternal homologs into eggs.6 If we could turn on telomerase activity in all ourcells, we could prevent aging.
The lifetime of a microtubule in a mammalian cell, between its formation by polymerization and its spontaneous disappearance by depolymerization, varies with the stage of the cell cycle. For an actively proliferating cell, the average lifetime is 5 minutes in interphase and 15 seconds in mitosis. If the average length of a microtubule in interphase is 20 μm, how long will it be during mitosis, assuming that the rates of microtubule elongation due to the addition of tubulin subunits in the two phases are the same?
Apply Evolutionary Thinking The genes and proteins involved in cell cycle regulation in prokaryotes and eukaryotes are very different. However, both types of organisms use similar molecular regulatory reactions to coordinate DNA synthesis with cell division. What does this observation mean from an evolutionary perspective?
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.
The Discovery of cdc2 as the key regulator of the cell cycle by Paul Nurse 3. When Paul Nurse did his own cdc screen in fission yeast, why was he more attracted to the wee mutants than to any of the other mutants? Why were smaller cells more interesting to him than arrested, or bigger celled mutants? 4. How did the Nurse lab people show that humans had a cdc homologue?
Polarity of oocyte of DrosophilaWhat are the cells surrounding the oocyte? Are they germ-line or somatic in origin?
True or False? Chromatin remodeling involves addition or removal of chemical groups to histones, which alters its binding affinity to DNA and influences whether the promoter region is available for RNApol to bind.
How to write the methodology? I have a practical of HOMOGENIZATION AND FREEZE-DRYING, I need to do a lab report, but I don't know how to write the methodology. Here is the introduction: HomogenizationHomogenization is a process that involves breaking apart cells to release theircytoplasm and its contents. When the purpose is to extract organelles, it is frequentlydone in two steps; first, using a blender to break the tissue up, and then with anultrasonic or mechanical tissue disruptor. The organelles are then generally separatedusing differential centrifugation.Freeze-dryingFreeze-drying also known as lyophilization, and it is a dehydration process typicallyused to preserve perishable material or make the material more convenient fortransport. It works by freezing the material and then reducing the surrounding pressureto allow the frozen water in the material to sublimate directly from the solid phase tothe gas phase.
Think about the important functions of telomeres. Now, imagine a scenario in which a mutant eukaryotic cell DID NOT have such specialized telomeric regions present on its chromosomes. List three major CONSEQUENCES of the lack of telomeres, based upon what you know about their normal functions.