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Biology

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
Light Microscope   Light passes through one or more lenses to produce an enlarged image of a specimen  
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electron microscope   Forms an image of a specimen using a beam of electrons rather than light  
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Magnification   The ability to make an image appear larger than its actual size  
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resolution   A measure of the clarity of an image  
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scanning tunneling microscope   Uses needle like probe to measure differences in voltage caused by electrons that leak, or tunnel, from the surface of the object being viewed  
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Cell theory   1. All living things are made of one or more cells 2. Cells are the basic units of structure and function in organisms 3. All cells arise from existing cells  
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cell membrane   Encloses the cell and separates the cell interior from its surroundings  
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cytoplasm   The interior of a cell  
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cytoskeleton   A system of microscopic fibers inside the cell  
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ribosome   Cellular structure on which proteins are made  
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prokaryote   A single celled organism that lacks a nucleus and other internal compartments  
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cell wall   A structure that surrounds the cell membrane and provides support for the cell  
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flagellum   Long threadlike structures that protrude from the cell’s surface and enable movement  
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eukaryote   Cells which have a nucleus and other comparments or organelles enabling these cells to function differently from bacteria  
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nucleus   Internal compartment that houses the cells DNA  
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organelle   Structures that carry out specific activities in the cell  
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cilium   Short hairlike structures that protrude from the surfce of some eukaryotic cells. Propel some cells through their environment  
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phospholipid   A lipid made of a phosphate group and two fatty acids  
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lipid bilayer   The phospholipids in cell membrane are arranged in a double layer  
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endoplasmic reticulum   an extensive system of internal membranes that move protiens and others substances through the cell  
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vesicle   A small membrane bound sac that transport substances  
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Golgi apparatus   A set of flattened, membrane-bound sacs that serves as the packaging and distribution center of the cell  
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lysosome   Small spherical organelles that contain the cell’s digestive enzymes  
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mitochondrion   harvests energy from organic compounds to make ATP  
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chloroplast   Use light energy to mak carbohydrates from carbon dioxide and water  
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central vacuole   Found in plant cells. Stores water and may contain substance including ions, nutrients and wastes  
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Created by: lin122