Lab Quiz# 1

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Lab Quiz# 1
2012-02-25 11:02:52
Biology 1050

Quiz 1 study questions
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  1. Unit (abbreviation)


    Conversions to other metric units


    Meter (m)


    100 cm, 1000 mm, 1,000,000 mm

    ? m

    Centimeter (cm)

    Centi = hundredth

    0.01 m, 10 mm

    ? m

    Millimeter (mm)

    Milli = thousandth

    0.001 m, 0.1 cm, 1000 mm

    ? m

    Micrometer (mm)

    Micro = millionth

    0.001 mm, 0.000001 m, 1000 nm

    ? m

    Nanometer (nm)

    Nano = billionth

    0.001 mm, 0.000000001 m

    ? m
    • Meter: 10 0m
    • Centemeter: 10-2m
    • Milimeter: 10 -3m
    • Micrometer: 10 -6m
    • Nanometer: 10 -9m
  2. 2.564 m = ? mm
  3. 0.96 cm = ? µm
    9600 um
  4. 7.4 x 10-5 nm = ? mm
    7.4 x 10-11 mm (?)
  5. What is calibration?
    A comparison between measurements
  6. What are the 4 magnifications on the microscope?
    • 4x
    • 10x
    • 40x
    • 100x
  7. The correlation between two parameters can be defined by the __________ of it's graph?
  8. The slope is the ______ ____ __________
    rate of change
  9. A scatter plot is?
    A type of graph that uses a two dimensional Cartesian Coordinate.
  10. Cartesian Coordinate consists of...
    of two axes, generally called the x-axis, or the abscissa, and the y-axis, or the ordinate.
  11. It is customary to place the independent variable on which axis of the graph?
  12. It is customary to place the dependent variable on which axis of the graph?
  13. The initial condition, one that is given, and does not change with the condition under which the parameters to be plotted are being observed or collected is called the...
    independent variable
  14. An entity that depends on the independent variable is the...
    dependent variable
  15. Hypertonic:
    higher concentration of solute
  16. Hypotonic:
    Lower concentration of solute
  17. Isotonic:
    equal concentrations of solute
  18. The slope of a graph represents what?
    The rate of change
  19. Osmosis is:
    the diffusion of water across a semi-permeable membrane
  20. Tonicity refers to:
    the concentration of solutes dissolved in water
  21. Water will move from an area with ____ tonicity to an area of ____ tonicity.
    • low
    • high
  22. Dialysis is
    diffusion through a differentially permeable membrane that separates small molecules or ions from large molecules or ions.
  23. Solute:
    substance that is dissolved in a solvent
  24. Solvent:
    substance that the solute is dissolved in
  25. Osmotic pressure:
    A hydrostatic pressure caused by a difference in the amounts of solutes between solutions that are separated by a semi-permeable membrane.
  26. Molarity
    moles per liter of solution (mol/L)
  27. In Lab # 2, how did we measure the rate of osmosis with the dialysis bag experiment?
    By measuring the change in weight of the bags.
  28. In lab #2 what is the purpose of bag 5 which has tap water in the bag and 60% sucrose in the beaker?
    To show that only water is moving accross the membrane. When there was glucose and water in the bag, the water would travel into the celll bc the bag was hypertonic. But when the sucrose was only in the beaker and water in the bag, the bag was hypotonic and the water left the bag.
  29. An enzyme is a ?
  30. What is a catalyst and what does it do?
    It is a compound that increases the rate of a reaction without being consumed in the process. It speeds up a chemical reaction by altering the intermediate steps of the reaction.