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Key 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
Chromatin   Structural component of the nucleus, composed of nucleic acids and proteins  
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Chromosome   Threadlike structures within the nucleus composed of a deoxyribonucleic acid (DNA) molecule that carries hereditary information encoded in genes.  
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cytoplasm   Jellylike substance found within the cell membrane composed of proteins, salts, water, dissolved gases, and nutrients  
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Deoxyribonucleic acid (DNA)   Molecule that holds genetic information capable of replicating and producing an exact copy whenever the cell divides  
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diaphragm   muscular wall that divides the thoracic cavity from the abdominopelvic cavity  
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metabolism   sum of all physical and chemical changes that take place in a cell or an organism  
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organelle   cellular structure that provides a specialized function  
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pathology   Study of the nature of diseases, their causes, development, and consequences  
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peristalsis   Rhythmic contraction and relaxation of the walls of a tubular organ to propel its contents onward.  
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