Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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A scientist adds colchicine, a microtubule polymerization inhibitor, to a cell entering mitosis. At metaphase, the chromosomes of the cell were arranged as shown below. Explain why this arrangement is consistent with the application of colchicine. Predict how colchicine would affect the cell as it attempts mitosis.
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- Explain whether the statement, "Chromosomes are positioned on the metaphase plate by equal and opposite forces that pull them toward the two poles of the spindle", is true or false.arrow_forwardYou remove cyclin from a cell during G2 a single time and then leave the cell alone. What is the consequence? Group of answer choices A. the cells exits mitosis into G1 B. the cell can never enter mitosis C. the cell immediately enters mitosis D. the cell's entry into mitosis is delayedarrow_forwardExplain: The cell has ----- Chromatides during g2. ------- Chromatides during a phase and. _________Chromatides during metaphase .arrow_forward
- What event is common to ALL signal transduction pathways? A) Calcium ions bind to/ activate proteins. B) Cyclic nucleotides are formed. C) Proteins change in shape. D) Phosphates are transferred between molecules. E) Protons are transferred between molecules.arrow_forwardwhich stage of the cell cycle do cells spend most of their time in? Explain why you think this is. Explain why mitosis is important to both unicellular and multicellular organisms. discuss how a carcinogen causes mutations that could cause the body to lose control over mitotic events and apoptosis (cell death). What can we do to protect ourselves from the harmful effects of carcinogens?arrow_forwardWhy is a rapidly growing tissue, such as the root tip of a plant, a good model for studying the effects of a drug on cell division?arrow_forward
- If a mad scientist hands you a cell culture with 100 cells that just entered g1. He needs to extract the MOST possible DNA from 100 cells. On top of that, he requires that the DNA cannot be condensed. To accomplish this goal he gives you a set of chemicals that will stop a cell in any part of the cell cycle you want. What part of the cell cycle would you stop the cell at, that matches those requirements?arrow_forwardWhat is the significance of the cell cycle control system and checkpoints? Explain step by step in your own words. [please make it simple]arrow_forwardIdentify the phase in mitosis in which the replicated sister chromatids line up in the centre of the cell. Select one: a. Anaphase b. Telophase c. Metaphase d. Prophasearrow_forward
- Why do cells undergo mitosis rather than meiosis to produce cells for growth and repair? please solve with complete explanationarrow_forwardThe drug taxol is extracted from the bark of yew trees. It binds tightly to microtubules and stabilizes them. When added to cells, it causes much of the free tubulin to assemble into microtubules. Taxol can be used as an anticancer drug. At the molecular level, what does the drug prevent? At the cellular level, what part of cell division does it prevent? Be specific.arrow_forwardDefine carrying capacity.arrow_forward
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