Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 6, Problem 7RQ
What is necessary for a cell to pass the
a. cell has reached a sufficient size
b. an adequate stockpile of
c. accurate and complete
d. proper attachment of mitotic spindle fibers to kinetochores
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What is necessary for a cell to pass the G2 checkpoint?a. cell has reached a sufficient sizeb. an adequate stockpile of nucleotidesc. accurate and complete DNA replicationd. proper attachment of mitotic spindle fibers to kinetochores
4) Describe in detail how p53 and MDM2 regulate cell division in a normal, healthy cell. You
should describe 1) how these proteins cooperate to allow a cell to go through the cell cycle, 2)
how they cooperate to stop the cell cycle, and 3) how they allow the cell cycle to continue again
after having stopped it initially. You may use point form if you want.
What part of the cell cycles are checkpoints that regulate the transition from anaphase to telophase?
A.
M checkpoint
B.
G2 checkpoint
C.
G1 checkpoint
D.
S checkpoint
Chapter 6 Solutions
Concepts of Biology
Ch. 6 - Figure 6.4 Which of the following is the correct...Ch. 6 - A diploid cell has _ ____ the number of...Ch. 6 - An organism’s traits are determined by the...Ch. 6 - Chromosomes are duplicated during what portion of...Ch. 6 - Separation of the sister chromatids is a...Ch. 6 - The individual chromosomes become visible with a...Ch. 6 - What is necessary for a cell to pass the G2...Ch. 6 - ________ are changes to the nucleotides in a...Ch. 6 - A gene that codes for a positive cell cycle...Ch. 6 - Which eukaryotic cell-cycle event is missing in...
Ch. 6 - FtsZ proteins direct the formation of a ________...Ch. 6 - Compare and contrast a human somatic cell to a...Ch. 6 - Describe the similarities and differences between...Ch. 6 - Outline the steps that lead to a cell becoming...Ch. 6 - Explain the difference between a proto-oncogene...Ch. 6 - Name the common components of eukaryotic cell...
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- Which of the following is true of normal adult cells but NOT cancer cells? A. Cell death after a finite number of cell divisions B. Contact with other cells increases likelihood of division C. Large amount of telomerase present D. Do not care about cell density while culturearrow_forward28. When studying living cells in a laboratory, rescarchers sometimes use drugs as a way to make cells remain at a particular stage of the cell cycle A drug that inhibits cytokinesis would leave cells arrested at which phase in the cell cycle? A) Interphase B) Telophase C) Anaphase D) Prophase E) Metaphase 29. An epigenetics modification is where: A) The DNA sequence of a gene is changed, altering gene expression B) A chemical modification (ie methylation) of DNA occurs that alters gene expression C) Gene expression is permanently changed over the course of many generations D) Both A and C E) Both B and C 30. A very rare dominant allele that causes the little finger to be bent has a penetrance value of 80% This means that? A) 80% of the total population does not have a bent little figure B) 80% of all heterozygotes carrying the allele will have a bent little finger C) 80% of the total population carries the allede for bent little finger D) 80% of all homozygous individuals carrying the…arrow_forwardIn the diagram, the speed bumps (look like short walls) represent __________. A) The only times at which genes may be actively expressed B) Points in time when the cell divides C) One-hour timepoints D) Checkpoints in the cell cycle .arrow_forward
- In multicellular organisms, nondividing cells stay in G0 phase. For the cell, why is it better to be held in G₁ rather than S, G₂ or M phase? A. G₁ cells are larger and more likely to perform the normal functions of the cell. B. G₁ cells have not replicated their DNA in preparation for division. C. G₁ cells are the only ones that do not have their chromatin in a highly condensed state. D. MPF is required to enter S phase, so the cell is committed to entering M phase if the cycle moves beyond G₁. How many does the chromosome number of the species A. Is equal to the diploid chromosome number. B. Refers to the chromosome number of the somatic cell. C. Is a constant number for the organisms of the species generation after generations. D. All of the above. Which statement about the daughter cells following mitosis and cytokinesis is correct? A. They are genetically different from each other and from the parent cell. B. They are genetically identical with each other and with the parent…arrow_forwardChromosomes are duplicated during what portion of the cell cycle? a. G 1 phase b. S phase c. prophase d. prometaphasearrow_forwardBiologists 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.arrow_forward
- The individual chromosomes become visible with a light microscope during which stage of mitosis? a. prophase b. prometaphase c. metaphase d. anaphasearrow_forwardEukaryotic cells coordinate dna replication with cell cycle so that the genome is copied once per cell division A. what happens during the licensing phase of orinal activation in which phase does licensing occur what happens during firing phase of original activation in which phase does it occurarrow_forwardDescribe the three most important cell cycle checkpoints. Explain in a detailed manner and provide some sample scenarios.arrow_forward
- 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 gradedarrow_forwardDuring the cell cycle, in which sub-phase(s) of interphase do restriction checkpoints exist to monitor the progress of the cell as it prepares to divide? O a. G₁ phase O b. S phase O c.G2 phase d. G₁ and G2 phases O e. G₁, S, and G2 phasesarrow_forwardDescribe the mammalian cell cycle briefly. In your work, include a description of how cyclins and cdks work in general. Specifically, what role do checkpoints play in the cycle and what aspects of the cellular environment do they respond to? When activated, the DNA replication (in G2) checkpoint blocks the activation of M-Cdk and thereby prevents entry into mitosis. How is phosphorylation used to regulate this checkpoint?arrow_forward
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