Lab Exam 1

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Lab Exam 1
2014-10-18 07:26:26
Lab exam 1
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  1. What are the three types of graphs commonly used?
    • 1. Line
    • 2. Bar
    • 3. Pie
  2. What are the three different types of microscopes?
    • 1. Stereo dissecting Microscope
    • 2. Compound light Microscope
    • 3. Electron Microscope
  3. What are the advantages of the stereo dissecting microscope?
    • useful in viewing larger specimens like insects or flowers
    • specimens don't need to be stained or fixed 
    • magnification of (7-30x)
  4. What are the advantages of the compound light microscope?
    • uses two lenses the ocular (eye piece) and the objective
    • magnification (40x-400x)
  5. What are the advantages of the electron microscope?
    • able to magnify the specimen a million times
    • uses a beam of electrons to penetrate the specimen
    • requires staining and a lot of preparation and effort
  6. how to figure out total magnification?
    multiplying the magnification objective by the magnification of ocular
  7. how to find the total magnification of objective?
    By dividing the total magnification by the magnification of ocular
  8. what does the ocular do?
    lens near the eye
  9. What does the body tube do?
    keeps ocular and objective at proper distance from each other
  10. what does the nose piece do?
    Permits interchange of low, medium, and high power objectives
  11. What does the arm do?
    Supports body tube and focus knobs
  12. What do the objectives do?
    contain lenses of various magnifications
  13. What does the coarse focus knob?
    moves stage for focusing
  14. what does the fine focus knob do?
    moves the stage in smaller increments to permit exact focusing
  15. What does the base do?
    bears the weight of the microscope and house the light sources
  16. What does the mechanical stage do?
    holds slides and allows controlled movement
  17. What does the iris diaphragm do?
    Regulates amount of light illuminating the specimen
  18. What does the illuminator do?
    provides light
  19. How many meters are there in a kilometer?
    1000 m
  20. How many cm in a meter?
  21. How many mm in a meter?
    1000 mm
  22. how many mm in a cm?
    10 mm
  23. What is my height in cm?
    162.56 cm
  24. What is the meniscus?
    the curved line at the top of the liquid
  25. What is the taxonomy key?
    It is a key to identify unknown specimens
  26. What is an atom?
    the smallest particle of an element
  27. what is a molecule?
    A particle composted of one or more atoms held together by chemical bonds
  28. What is an element?
    a substance that cannot be broken down or converted to a simpler substance
  29. what is a base?
    substances that release hydroxide ions in solution
  30. What is an acid?
    substances that release hydrogen ions in solution
  31. What is a macromolecule?
    a molecule containing a very large number of atoms
  32.    amino group
  33. What is the color of hydrogen and the number of bonds?
    yellow and one bond
  34. What is the color of carbon and how many bonds?
    black and 4
  35. What is the color of oxygen and number of bond sites?
    red and two bonds
  36. What is the color of nitrogen and how many bonds?
    blue and three bonds
  37. What is the test reagent of proteins?
    Biuret solution (dark purple positive)
  38. What is the test reagent of lipids?
    Sudan solution (mixes with solution for positive)
  39. What is the test regnant of starch?
    iodine (dark purple positive)
  40. What is the test reagent of glucose?
    benedicts solution (orange when positive)
  41. What is an example of a simple carbohydrate?
  42.  spirogyra
  43.  Anabaena
  44.  euglena
  45.  amoeba
  46.  vorticella
  47.  allium
  48.  human cheek cell
  49. What is prokaryotic?
    single cell organisms that lack a nucleus
  50. what is eukaryotic?
    cell with a nucleus