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Biology Ch. 12: The Cell Cycle Flashcards

Cambell and Reece 8th edition. Self-selected for my particular course.

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158726464Multicellular organisms depend on cell division for:Development from a fertilized cell Growth Repair
158726465gametesNonidentical daughter cells (aka sperm and egg cells) In terms of DNA
158726466genomeAll the DNA in a cell. A genome can consist of a single DNA molecule (prokaryotic) or multiple (euky)
158726467chromosomesWhat DNA molecules in a cell are packaged into
158726468Somatic cells(nonreproductive cells) have two sets of chromosomes
158726469How many chromosomes are in gametes?Gametes (reproductive cells: sperm and eggs) have half as many chromosomes as somatic cells
158726470chromatina complex of DNA and protein that condenses during cell division
158726471sister chromatidsEach duplicated chromosome has two sister chromatids, which separate during cell division
158726472centromerethe narrow "waist" of the duplicated chromosome, where the two chromatids are most closely attached
158726473MitosisDivision of the nucleus
158726474CytokinesisDivision of the cytoplasm
158726475Eukaryotic cell division consist of what two stages?Mitosis and Cytokinesis.
158726476MeiosisA variation of cell division by which gametes are produced.
158726477What is the product of meiosis?Meiosis yields nonidentical daughter cells
158726478How many sets of chromosomes do meiotic daughter cells have?One set, which is half as many as the parent cell
158726479The cell cycle consists ofMitotic (M) phase (mitosis and cytokinesis) Interphase (cell growth and copying of chromosomes in preparation for cell division)
158726480What takes place in M phase?Mitosis and Cytokinesis
158726481What takes place in interphase?Cell growth and copying of chromosomes in preparation for cell division.
158726482What are the three subphases of interphase?G1 ("first gap"), S ("synthesis"), and G2 ("second gap"
158726483The cell grows in what phases of interphase?All three phases
158726484What phases of interphase are chromosomes duplicated?The S phase
158726485What are the fives phases of mitosis?PP MAT Prophase, Prometaphase, Metaphase, Anaphase, Telophase
158726486Cytokinesis occurs in what phase of mitosis?Telophase
158726487Describe G2 of Interphase1. Nuclear Envelope is formed, 2. Two centrosomes are formed via replication, 3. Chromosomes are not yet condensed
158726488Describe Prophase1. Chromatin fibers condense into chromosomes made of sister chromatids, 2. Nucleoi disappear, 3. Mitotic Spindle begins formation 4. Centrosomes move away from each other
158726489Describe Prometaphase1. Nuclear Envelope Fragments, 2. Microtubles of spindle invade nuclear area, 3. Chromosomes more condensed and have a kinetochore, 4. Kinetochore and nonkinetochore microtubules
158726490Describe Metaphase1.Longest stage, 2. Opposite Centrosomes, 3. Chromosomes line up on metaphase plate, 4. Tubules attached to kinetochore
158726491Describe Anaphase1. Shortest stage, 2. Daughter Chromosomes are seperated
158726492Telophase1. Two daughter nuclei form, 2. Nuclear envelopes and Nucleoi appear, 3. Chromosomes less condensed
158726493CytokinesisDivision of cytoplasm well under way by late telophase, daughter cells appear shortly after mitosis. Cleavage furrow pinches cells in two.
158726494centrosomethe microtubule organizing center
158726495astera radial array of short microtubules that extends from each centrosome
158726496What composes the mitotic spindle?The centromsome, the aster, and the microtubules
158726497kinetochoresprotein structure located a centromere of daughter chromosomes
158726498What occurs during cytokinesis in plant cells?A cell plate is formed
158726499Binary FissionProkaryotes (bacteria and archaea) reproduce by a type of cell division called binary fission. The chromosome replicates and two daughter chromosomes actively move apart
158726500origin of replicationIn binary fission, the chromosome replicates (beginning at the origin of replication), and the two daughter chromosomes actively move apart
158726501cell cycle control systemThe sequential events of the cell cycle are directed by a distinct cell cycle control system, which is similar to a clock. The cell cycle control system is regulated by both internal and external controls. The clock has specific checkpoints where the cell cycle stops until a go-ahead signal is received
158726502What is the most important cell checkpoint?G1
158726503What happens if cell does not receive G1 checkpoint clearance?Switch to nondividing state G0 phase

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