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12 November, 2015 - 09:30
  1. When viewing a specimen through a light microscope, scientists use   to distinguish the individual components of cells.
    1. a beam of electrons
    2. radioactive isotopes
    3. special stains
    4. high temperatures
  2. The   is the basic unit of life.
    1. organism
    2. cell
    3. tissue
    4. organ
  3. Which of these do all prokaryotes and eukaryotes share?
    1. nuclear envelope
    2. cell walls
    3. organelles
    4. plasma membrane
  4. A typical prokaryotic cell   compared to a eukaryotic cell.
    1. is smaller in size by a factor of 100
    2. is similar in size
    3. is smaller in size by a factor of one million
    4. is larger in size by a factor of 10
  5. Which of the following is found both in eukaryotic and prokaryotic cells?
    1. nucleus
    2. mitochondrion
    3. vacuole
    4. ribosome
  6. Which of the following is not a component of the endomembrane system?
    1. mitochondrion
    2. Golgi apparatus
    3. endoplasmic reticulum
    4. lysosome
  7. Which plasma membrane component can be either found on its surface or embedded in the membrane structure?
    1. protein
    2. cholesterol
    3. carbohydrate
    4. phospholipid
  8. The tails of the phospholipids of the plasma membrane are composed of   and are​  ?
    1. phosphate groups; hydrophobic
    2. fatty acid groups; hydrophilic
    3. phosphate groups; hydrophilic
    4. fatty acid groups; hydrophobic
  9. Water moves via osmosis   .
    1. throughout the cytoplasm
    2. from an area with a high concentration of other solutes to a lower one
    3. from an area with a low concentration of solutes to an area with a higher one
    4. from an area with a low concentration of water to one of higher concentration
  10. The principal force driving movement in diffusion is   .
    1. temperature
    2. particle size
    3. concentration gradient
    4. membrane surface area
  11. Active transport must function continuously because   .
    1. plasma membranes wear out
    2. cells must be in constant motion
    3. facilitated transport opposes active transport
    4. diffusion is constantly moving the solutes in the other direction