PLB 115 chapter 8 – Flashcards
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Which of the following techniques would be useful in controlling cancer once it has formed an abnormal growth?
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Treat the cancer with drugs or other therapies that kill dividing cells
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__________ may cause cancer.
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Mutagenic agents
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Cells spend most of their life
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in the G0 phase.
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An organelle used during animal cell division is the
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centriole.
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During prophase of mitosis, the
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nucleoli and nuclear membrane disappear.
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During which of the following stages of the cell cycle does DNA replication (duplication) take place?
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interphase
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In a human the 46 chromosomes would be at the equator during
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metaphase.
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Fibers extending from cell pole to cell pole are called the
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spindle.
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Two chromatids are connected by a
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centromere.
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Radiation most likely destroys cancer cells by inducing a process called
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apoptosis.
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Controlled cell death is termed
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apoptosis.
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A cell mass that does not fragment and spread beyond its original area of growth is known as a
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benign tumor.
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In which of the following stages of the cell cycle does the cell contain chromosomes consisting of 2 chromatids joined by a centromere?
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metaphase
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Centromeres are
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regions that attach chromosomes.
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Chromosomes align along the equator during
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metaphase.
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Which of the following is typical of interphase?
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DNA replicates.
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The process of cell specialization within a multicellular organism is
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differentiation.
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Daughter cells are formed during
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telophase.
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During prophase ____ are formed.
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spindles
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The order in which the stages of mitosis proceed is
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prophase, metaphase, anaphase, telophase, interphase.
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A normally functioning muscle cell is in which stage of its cycle?
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G0
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Proteins required for the spindles are synthesized in the
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G2 stage.
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Which of the following is NOT true of cytokinesis?
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Cytokinesis occurs during interphase.
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DNA replication occurs during
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S phase of interphase.
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The physician explained that her cancer had metastasized or
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spread from its original site.
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____ is NOT part of interphase.
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Cytokinesis
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The stage during which the chromosomes shorten by condensing their nucleoprotein is called
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prophase.
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Tumors that are harmful, non-encapsulated growths of cells are known as
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malignant.
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During telophase of mitosis the
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chromosomes have ended their move toward the poles.
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"I can tell this cell is in metaphase because..."
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the chromosomes are aligned on the equator of the cell.
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The most important result of mitosis is the
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exact duplication of the parent cell's genetic information.
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The normal outcome of mitosis is
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to produce genetically identical copies of cells.
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DNA is synthesized in which stage of the typical cell cycle?
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S
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A dividing cell lacks a nuclear membrane, contains chromosomes consisting of two chromatids, and has clearly visible chromosomes. It is in which one of the following stages?
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metaphase
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Chromosomes first become visible during
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prophase.
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Which of the following is NOT true concerning mitosis?
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It insures the immortality of the genetic information possessed by an organism.
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____ is NOT an event of telophase.
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Breaking down of nucleoli
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When the chromosomes have moved around so that they all lie on a plane in the middle of the cell, the stage is called
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metaphase.
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During anaphase of mitosis, the
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number of distinct chromosomes present is twice the number that were present before mitosis started.
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The whole point of mitosis is to
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reproduce the parent cell into genetically identical daughter cells.
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A cell that contains eight chromosomes and is undergoing mitosis will produce ____ daughter cell(s); each daughter cell will contain ____ chromosomes.
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two; eight
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After cell division, some cells become differentiated. This means that they
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become different in all these ways.
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In which of the following stages of the cell cycle would you find chromosomes separated into individual chromatids?
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telophase
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Chromosomes move toward the poles during
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anaphase.
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The metaphase stage of mitosis is characterized by the
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arrangement of chromosomes on a plane.
