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chapter 6 and 7 test

mcarpent6140 16 preguntas

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Preguntas del test (16)

  1. 1Which solution has the highest concentration of particles?
    1. A1 M calcium chloride
    2. B1 M sucrose
    3. C1.5 M glucose
    4. D0.5 M sodium chloride
  2. 2The solution with the highest water potential is
    1. A0.1 M sucrose
    2. B0.4 M sucrose
    3. C0.2 M sucrose
    4. D0.6 M sucrose
  3. 3glucose diffuses slowly through artificial phospholipid bilayers called?
    1. Asimple diffusion
    2. Bphagocytosis
    3. Cactive transport protein
    4. Dfacilitated diffusion
  4. 4The presence of cholesterol in the plasma membrane of some animals
    1. Amembranes more fluid when cell temperature drops
    2. Ballows removal of hydrogen from saturated phospholipids
    3. Callows addition of hydrogen to unsaturated fats
    4. Dmembranes are flexible thus it can sustain greater
  5. 5If a modern electron microscope (TEM) can resolve biological images to the nanometer level as opposed to the best light microscope this is due to which of the following?
    1. Athe focal length of the electron microscope is significantly longer
    2. Bcontrast is enhanced by staining with atoms of heavy metal
    3. Celectron beams have much shorter wavelengths than visible light
    4. Dthe electron microscope has much greater ratio of image size to real size
    5. Ethe electron microscope cannot image whole cells at one time
  6. 6Which of the following correctly lists the order in which cellular components will be found in the pellet when homogenized cells are treated with increasingly rapid spins in a centrifuge?
    1. Aribosomes, nucleus, mitocondria
    2. Bchloroplasts, ribosomes, vacuoles
    3. Cnucleus, ribosomes, chloroplasts
    4. Dvacuoles, ribosomes, nucleus
    5. Enucleus, mitocondria, ribosomes
  7. 7In the fractionation of homogenized cells using centrifugation, the primary factor that determines whether a specific cellular component ends up in the supernatant or the pellet is
    1. Athe relative solubility of the component
    2. Bthe size and weight of the component
    3. Cthe percentage of carbohydrates in the component
    4. Dthe number of enzymes in the fraction
    5. Ethe presence or absence of lipids in the component
  8. 8A primary objective of cell fractionation is to
    1. Aview the structure of cell membranes
    2. Bidentify the enzymes outside the organelles
    3. Cdetermine the size of various organelles
    4. Dseparate the major organelles so that their particular functions can be determined
    5. Ecrack the cell wall so the cytoplasm contents can be released
  9. 9The advantage of light microscopy over electron microscopy is that
    1. Alight microscopy provides for a higher magnification than electron microscopy
    2. Blight microscopy provides for higher resolving power than electron microscopy
    3. Clight microscopy allows one to view dynamic processes in living cells
    4. DA and B
    5. EB and C
  10. 10When biologists wish to study the internal ultrastructure of cells, they most likely would use
    1. Aa light microscope
    2. Ba scanning electron microscope
    3. Ca transmission electron microscope
    4. DA and B
    5. EB and C

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ap bio test
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