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BSC114 Chapter 12 Study Guide

by: Lauren Dutch

BSC114 Chapter 12 Study Guide Biology 114

Marketplace > University of Alabama - Tuscaloosa > Biology > Biology 114 > BSC114 Chapter 12 Study Guide
Lauren Dutch
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study guide for chapter 12 cell cycle and mitosis for exam on 10/18/16
Principles of Biology
Dr. Stevan Marcus
Study Guide
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This 2 page Study Guide was uploaded by Lauren Dutch on Thursday October 13, 2016. The Study Guide belongs to Biology 114 at University of Alabama - Tuscaloosa taught by Dr. Stevan Marcus in Spring 2016. Since its upload, it has received 13 views. For similar materials see Principles of Biology in Biology at University of Alabama - Tuscaloosa.


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Date Created: 10/13/16
Chapter 12 Study Guide: 1. The person credited with first recognizing (in the 1860s) that living cells cannot arise spontaneously, but arise only from previously existing cells, is Rudolf Virchow. 2. The function of the mitotic cell cycle is to produce daughter cells that are genetically identical to the parent cell. 3. Sister chromatids end up in separate daughter cells after cytokinesis has occurred. 4. The complex of DNA and protein that makes up a eukaryotic chromosome is properly called chromatin. 5. The region of a chromosome in which the two double strands of replicated DNA are held together is called a centromere. 6. The centromere is a region in which sister chromatids are attached to one another in prophase. 7. 23 maternal chromosomes are present in somatic human cells not engaged in cell division. 8. A cell entering the cell cycle with 32 chromosomes will produce two daughter cells, each with 32 chromosomes. 9. Cytokinesis refers to the division of the cytoplasm. 10.Chromatids are identical copies of each other if they are part of the same duplicated chromosome. 11.If a cell contains 60 chromatids at the start of mitosis, there will be 30 chromosomes in each daughter cell at the completion of the cell cycle. 12.A biochemist measured the amount of DNA in cells growing in the laboratory and found that the quantity of DNA in the cells doubled between the G1 and G2 phases. 13.A cell biologist carefully measured the quantity of DNA in grasshopper cells growing in cell culture. Cells examined during the G2 phase of the cell cycle contained 200 units of DNA. In the G1 phase of a grasshopper daughter cell, there would be 100 units of DNA. 14.During interphase, the genetic material of a typical eukaryotic cell is dispersed in the nucleus as long strands of chromatin. 15.DNA replication occurs in the S phase of interphase. 16.If a human somatic cell is just about to divide, it has 92 chromatids. 17.Down syndrome is characterized by cells having three copies of chromosome 21. As a cell in an individual with Down syndrome prepares to enter mitosis, there would be 94 chromatids present. 18.Replication of chromosomes does not occur during mitosis. It occurs during interphase. 19.G2 has the most DNA per cell in the cell cycle. 20.In telophase of mitosis, the mitotic spindle breaks down and the chromatin uncoils. This is essentially the opposite of what happens in prophase. 21.Telophase is essentially the opposite of prometaphase in terms of the nuclear envelope. 22.Assume that you are dealing with a species in which the number of chromosomes in each somatic cell is 14. There would be 0 chromatids present in the early telophase of mitosis. 23.Centrosomes separate in prophase. 24.Following cytokinesis in an animal cell, each new daughter cell has two centrioles. 25.The phase of mitosis during which the chromosomes move toward separate poles of the cell is anaphase. 26.One event occurring during prophase is the beginning of the formation of a spindle apparatus. 27.During anaphase, cohesions joining sister chromatids at the centromeres are cleaved; the centrioles are at opposite poles; a spindle made of microtubules is present; and genetically identical chromosomes move to opposite poles. 28.The nuclear envelope does not disappear during metaphase. It disappears earlier than that. 29.Sister chromatids separate during anaphase. 30.In animal cell mitosis, the cleavage furrow forms during cytokinesis. 31.During metaphase, chromosomes line up in one plane in preparation for their separation to opposite poles of the cell. 32.You would know that a dividing cell was a plant cell rather than an animal cell if you saw that it had formed a cell plate. 33.Mitosis does not occur in dividing bacteria. 34.During binary fission in a bacterium, the origins of replication move apart. 35.During binary fission, one copy of the single parental chromosome is distributed to each daughter cell. 36.When a cell in S phase is fused with a cell in G1, DNA synthesis begins immediately in the original G1 nucleus. 37.Tissue culture experiments with PDGF demonstrate that without this substance fibroblasts fail to divide. 38.Nerve cells don’t divide. 39.Observing cancer cells in culture shows that cancer cells do not exhibit density dependent inhibition. 40.Cells of benign tumors do not metastasize; those of malignant tumors do.


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