DNA

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DNA
Know your chromosome
Cell Cycle
Name that phase
Cell Cycle again
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DNA is found ?
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In the nucleus
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What are the smaller units of DNA?
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Nucleotides
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What are the 3 parts of a nucleotide
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Deoxyribose sugar, phosphate group and nitrogen
base (ATG or C)
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DNA replication proceeds in ___ direction/s?
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TWO
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Describe DNA replication
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DNA replication occurs when the enzymes unzip the
DNA molecule and DNA Polymerase helps to place
nucleotides to form complimentary copy of the
existing DNA. 2 identical copies are produced.
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Each chromosome consists of 2 ?
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Chromatids
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______ are located in the middel of the chromatids
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Centromere
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Chromosomes contain proteinscalled ___
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Histones
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Cells chromesomes copy during__?
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S phase.
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Together the DNA and the histone make up ___
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Nucleosomes
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Longest phase of the Cell Cycle?
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Interphase
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What are the 3 phases of Interphase?
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G1,S, G2
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What are the phases of the Cell Cycle?
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G1, S,G2, M
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What is cytokinesis?
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Separation of the cytoplasm.
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Describe what happens at each phase of the cell
cycle
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G1-growth, S-DNA replication,G2 prep for mitosis,
Prophase-Chromatin condenses, spindle fibers
form, Centrioles separate, Nuclear memebrane
breaks down, Metaphase-chromosomes align in the
middle of the cell. Anaphase-chromosomes move
away from the center. Telophase-new membranes
form.
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A series of events that cells go through as they
grow and divide
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Cell cycle
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(No Transcript)
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Anaphase
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(No Transcript)
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Prophase
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(No Transcript)
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Interphase
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(No Transcript)
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Telophase
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Metaphase
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What is the role of cyclins?
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Regulate cell growth
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What should happen when cells come in contact
with other cells
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They should stop growing
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A disorder in which some cells have lost the
ability to control their growth
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Cancer
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Cancer cell form masses of cells called
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tumor
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A parent cell having 4 chromosomes will produce
two daughter cells that contain two daughter
cells each containing__ chromosome
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2
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What is one structure used in mitosis that is
found in animal cells and not plant cells.
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centrioles