Answered: 8. a. What are the four major stages of…

8. a. What are the four major stages of the cell cycle?b. Which stages are included in interphase?c. What events distinguish G1, S, and G2?

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter10: Chromosomes, Mitosis, And Meiosis

Section10.2: The Cell Cycle And Mitosis

Problem 5LO

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Concept explainers

Oogenesis

The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.

Cell Division

Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:

Question

8. a. What are the four major stages of the cell cycle?
b. Which stages are included in interphase?
c. What events distinguish G1, S, and G2?

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Prophase Metaphase Anaphase Telophase
4. Figure below shows drawings of a cell at various stages in the mitotic cell cycle. A B E (a) List the letters shown in figure above in the order in which these stages occur during a mitotic cell cycle. [2] (b) Explain what is happening in stage D in figure above. [2]
1. Mitosis: a. Are the chromosomes at each pole during telophase identical to chromosomes in the original cell (prior to S phase of cell cycle)? b. Are the new daughter cells genetically identical to the original cell? c. Does crossing over occur in mitosis? Explain.
1. The cell cycle is fundamental to the reproduction of eukaryotic cells. (a) Describe the phases of the cell cycle. (b) Explain the role of TWO of the following in mitosis or cytokinesis. . Kinetochores Microtubules Centrosome (c) Describe how the cell cycle is regulated and discuss ONE consequence of abnormal regulation. Cell cycle C.
3) Draw a diagram of the cell cycle (G1, S..) and indicate places where errors in cell division might lead to cancer.
1. What are the four distinct phases of the cell cycle? What are the specific events that happen during each phase? 2. What are ensured by G, and G, as well as metaphase checkpoints? 3. What happens during the G, phase?
1. (a) Describe the generalized model of the cell cycle. Demonstrate how cyclins and cyclin-dependent kinases can regulate the cell cycle. (b). Describe three ways in which cells lose their ability to regulate their growth to become cancerous.
1)Describe what takes place in the three phase of interphase. 2) what are cell cycle checkpoints? Where are they found in the cell cycle? What do they check for?
1. Which among the lettered cells in Fig 2 are at interphase stage? 2. What mitotically important events occur in the cell during interphase? 3. What feature is labelled “V” in figure 2?
8. Based on this picture, identify each part of this diagram and answer the following: A. G1 is represented by which number? B. Mitosis is represented by which number? C. Which number represents duplication of chromosomes during the cell cycle?
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.
1. Growth factors stimulate the cell to enter the G1 phase of the cell cycle. During this phase, the synthesis of enzymes that catalyze the formation of deoxyribonucleotides (dNTPs) is induced. In what process are these substrates used in the S phase of the cell cycle? To answer the question: a) Draw a scheme of the process in which deoxyribonucleotides are substrates; b) name the enzymes, indicate their role and the biological significance of the process.