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29 Cards in this Set
- Front
- Back
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Robert Hooke?
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Built microscope and examined thin slices of cork.
Limited magnification power. |
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Leeuwenhoek:
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Small lens that could magnify objects.
First to observe living cells, blood, sperm, bacteria, algae, etc. Year: 1600 |
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Factors affecting seeing (using microscope)
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resolution (resolving power)
age of observation. little thought to explain why. |
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Robert Brown:
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every plan cell had a rounded shape. a NUCLEUS. (kernal)
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Scleiden:
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plant tissues are composed of cells
+ embryonic plants arise from a single cell |
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Schwann
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plants and animals do not resemble one another structurally
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Schwann developed unified theory of cell organization. The Cell Theory (1839):
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1. consist of 1+ ell
2. basic unit of life. |
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Virchow: after schwann, found that...
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cells arise from division of other, existing cells.
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Cell is also the basic unit of reproduction as well as unit of life? T or F?
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True.
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cell shape and structure gives clues to its
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function!
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what does biology today entail?
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cytology, biochem, genetics
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Cytology. define:
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cellular structure studies
study of cells |
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biochem (define):
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cell function and structure
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genetics (define) importance in cell:
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Mendel (austrian monk): genomes, cloning,
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Light microscope:
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- earliest tool
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Define Microtome:
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developed for rapid and effiecietn preparion of vvery thin tissue slices of bio. samples. dyes, stain. etc.
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Limit of resolution:
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how far apart adjacent objects must be inorder to distinguish seperate entities.
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resolving power in a microscope
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ability to see details of structure.
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impt. of phase contrast and differential inteference contrast microscopy:
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possible to see living cells.
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flourenscence microscopy:
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detect specific proteins, DNA, etc.
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Transition Electron Microscope
and the Scanning Electron Microscope are: |
employs a beam of electrons, uses negative staining, shadowing, freeze fracturing, freeze etching,
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Enzymes:
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Yeast.
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chromotpgraphy:
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coloumn, mix of molecules are fractioned
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electrophoresiis:
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electrical field to seperate molecules based on mobilothy
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mass spectrometry used for:
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size and composition of individual proteins.
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Flemming saw chromosomes:
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mitosis division process, 'thread like'.
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DNA sequencing
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genomes (total DNA content of a cell)
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scientific method:
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- hypothesis to test.
- experiement - collect data, intrepret - |
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scientific method consists of 3 main things:
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1. hypothesis
2. theory 3. law |
