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Definition
Fingerlike projections of the plasma membrane that increase surface area for absorbing nutreitns and otehr materials.
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| A compound microscope. Typically used by students. A tube with glass lenses at each end. |
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| The ratio of the size of the image seen with the microscope to the actual size of the object. |
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| the capacity to distinguish fine detail in an image. |
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Definition
| Uses electrons for s resolving power of over 10,000. |
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| Transmission Electron microscopy |
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Definition
| specimen is embedded in plastic which is cut into think slices. The electron beam passes through and then falls onto a photographic plate. |
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| Scanning Electron microsope |
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| The electron beam does not pass through the specimen. |
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| The technique for purifying organelles. |
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| puts an object in rotation around a fixed axis. |
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| differential centrifugation |
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Definition
| used to separate certain organelles from their cells. |
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| The location of DNA in a prokaryotic cell. It has no membrane. |
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| extra cellular structures that enclose the whole cell, including the plasma membrane. |
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| Found in prokaryotes, they are long fibers that are use like propellers in locomotion. |
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| small complexes of RNA and protein that synthesize polypeptides. |
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| They have highly organized membrane enclosed organelles and a central nucleus. |
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| The part of the cell outside the nucleus. |
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| The part of the cell inside the nucleus. |
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| The fluid part of the cytoplasm. |
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| The internal membrane system. |
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Definition
| small membrane enclosed sacs formed by budding from the membrane of another organelle. They carry materials from one organelle to another. |
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| The most prominent organelle in the cell. |
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| consists of two concentric membranes that separate the nuclear contents from the surround cytoplasm. |
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| regulate the passage of materials from the cytoplasm to nucleoplasm. |
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| sequences of nucleotides contained in DNA which contain the chemically encoded instructions for making proteins. |
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Definition
| Appears in cells that are not yet dividing as DNA. |
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Definition
| compact DNA molecules in the nucleus |
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