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terms

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
nucleus   is a spherical or oral-shaped sturcture that usually is the most promient feature of a cell  
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chromosomes   contain are genes; the source of information for building and running cells  
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nuclear envelope   separtes the nucleus from the cytoplasm;NE- is double-walled  
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nucleolus   is a site within the nucleus that oroduces new ribosomes  
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DNA   double straneded  
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RNA   single strandeded  
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humans have....   46 chromosomes  
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messenger RNA (mRNA)   RNA conatins sequence meant to encode proteins  
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translation   the mRNA sequence is used to make new proteins in a process  
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transcription   is the process where DNA sequence is copied (or transcribed) into RNA sequence  
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RNA polymerase   stick stuff together  
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rRNA   joins with ribosomal proteins to make ribosomes  
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tRNA   binds to an amino acids and holds it in place on a ribosome unitl it is incorapted into a protein during translation  
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mRNA   traveling copy of a gene, enters the cytoplasm to dircet the synthesis of a specfic protein  
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tRNA   "taxi"  
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interphase   is not a stage in mitosis  
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cytokinesis   takes place at the end  
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G0 phase   never divide; "mermory cell"  
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G0 phase   8-10 hours  
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G2 phase   4-6 hours  
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cell division   the process by which cells reproduce themselevs  
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2 types of cell division   somotic cell division, reproductive cell division  
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meiosis   start with one cell end up with four new cells  
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DNA molecules   are copied during the S phase  
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the sturcutre of the double helix...   allows both copies of the new DNA to have the same sequence  
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meiosis   the reproductive cell division that occurs in the gonads (ovaries and testes) produces gametes in which the number of chrosomes is reduced by half  
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cytokinesis   cells finsih dividing, (after mitosis)  
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cells grow, and also duplicate their DNA during   interphase  
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RNA polymerase   creates the RNA molecules  
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"long arm"   Q  
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"short arm"   P  
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long and short arm are in...   the chromosomes  
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each chromosme contains DNA combined with histone proteins to form   chromatin  
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centromere   after DNA replication, sister chromatids are connected  
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stromal cells   connective tissue cells of an organ found in the loose connective tisue  
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system lupus erythematosus   a chronic, inflammatory autimmune disorder  
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system lupus erythematosus   affect the skin, joints, kidneys and other organs  
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proteosomes   a subcellular organele foud throughout the cytosol, nucleus endoplasmic reticulum (ER) and lyosomes of eukaryotic cells  
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Created by: Courtneey
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