Biology Exam 2 Pt. 2

56 Questions | Total Attempts: 94

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Biology Quizzes & Trivia

Jennifer schwartz class at PPCC


Questions and Answers
  • 1. 
    Which of the following functions as a recognition signal for interactions between cells?
    • A. 

      RNA

    • B. 

      Phospholipids

    • C. 

      Cholesterol

    • D. 

      Fatty acids

    • E. 

      Glycolipids

  • 2. 
    Which of the following represents the correct pathway for the synthesis and secretion of insulin, a protein secreted by the cells of the pancreas?
    • A. 

      Rough ER; Golgi apparatus; vesicle; plasma membrane

    • B. 

      Golgi Apparatus; rough ER; lysosome

    • C. 

      Lysosome; vesicle; plasma membrane

    • D. 

      Plasma membrane; cloated vesicle; lysosome

    • E. 

      Rough ER; cytoplasm; plasma membrane

  • 3. 
    Cell growth can involve movement of membrane material from
    • A. 

      The cell membrane to the vesicles

    • B. 

      The Golgi apparatus to the cell membrane

    • C. 

      The smooth ER to the rough ER

    • D. 

      Coated pits to the inside of the cell.

    • E. 

      The nuclear envelope directly to the cell membrane.

  • 4. 
    The difference between tight junctions, desmosomes and gap junctions is that
    • A. 

      Desmosomes and gap junctions contain keratin, whereas tight junctions have collagen.

    • B. 

      Gap junctions and tight junctions have specialized protein channels called connexons; desmosomes do not.

    • C. 

      Tight juctions and desmosomes have mechanical roles, whereas gap junctions facilitate communication between cells.

    • D. 

      Desmosomes and gap junctions are found in epithelial tissue, whereas tight junctions are found in nerve cells.

    • E. 

      They all have different functions; however, their structure is the same.

  • 5. 
    Which of the following does not affect the rate of diffusion of a substance?
    • A. 

      Temperature of the solution

    • B. 

      Concentration gradient

    • C. 

      Electrical charge of the diffusing material

    • D. 

      Presence of other substances in the solution

    • E. 

      Molecular diameter of the diffusing material

  • 6. 
    Osmosis moves water from a region of ____ to a region of ____.
    • A. 

      High concentration of dissolved material; low concentration of dissolved material

    • B. 

      Low concentration of dissolved material; high concentration of dissolved material

    • C. 

      Hypertonic solution; hypotonic solution

    • D. 

      Negative osmotic potential; positive osmotic potential

    • E. 

      Low concentration of water; high concentration of water

  • 7. 
    Which of the following molecules is the most likely to diffuse across a cell membrane?
    • A. 

      Glucose

    • B. 

      Na*

    • C. 

      A steroid

    • D. 

      A common amino acid

    • E. 

      Cl-

  • 8. 
    When placed in a hypertonic solution, animal cells
    • A. 

      Shrink.

    • B. 

      Swell.

    • C. 

      Burst.

    • D. 

      Do not change.

    • E. 

      Swell but not burst because of the cell wall.

  • 9. 
    If a red blood cell is placed in an isotonic solution,
    • A. 

      The cell will shrivel.

    • B. 

      The cell will swell and burst.

    • C. 

      The cell will shrivel and then return to normal.

    • D. 

      The cell will swell and then return to normal.

    • E. 

      Water moves into and out of the cell at an equal rate, but there is no net change.

  • 10. 
    The speed and direction of ions as they move into and out of the cell are determined by the
    • A. 

      Ability of the ion to let go of its water

    • B. 

      Concentration gradient and elec trochemical imbalances

    • C. 

      Number of channel proteins present.

    • D. 

      Size and charge of the ion.

    • E. 

      Presence of specific stimuli to open gated channel proteins.

  • 11. 
    One result of the movement of ions through ion channels is the creation of a membrane potential.  The membrane potential is
    • A. 

      A charge imbalance across the plasma membrane.

    • B. 

      The difference in ion concentrations on either side of hte plasma membrane.

    • C. 

      The difference in ATP concentration son either side of hte plasma membrane.

    • D. 

      The capacity for active transport.

    • E. 

      The ability of macromolecules to recognize and adhere to one another.

  • 12. 
    In facilitated diffusion, the diffusion rate of a specific molecule across a membrane does not continue to increase as the concentration difference of the molecule across the membrane increases becasue
    • A. 

      Facilitated diffusion requires the use of ATP.

    • B. 

      As the concentration difference increases, molecules interfere with one another.

    • C. 

      The carrier proteins are saturated.

    • D. 

      The transport protein must be of the channel type

    • E. 

      The diffusion constant depends on the concentration difference.

  • 13. 
    Active transport usually moves molecules
    • A. 

      In the same direction as diffusion moves them.

    • B. 

      In the opposite direction in which diffusion moves them.

    • C. 

      In a direction that tends to bring about equilibrium.

    • D. 

      Toward higher pH.

    • E. 

      Toward higher osmotic potential.

  • 14. 
    In the parietal cells of the stomach, the uptake of chloride ions is coupled to the transport of bicarbonate ions out of the cell.  This type of transport system is called
    • A. 

      A uniport.

    • B. 

      A symport.

    • C. 

      An exchange channel.

    • D. 

      Diffusion.

    • E. 

      An antiport.

  • 15. 
    The only process that can bring glucose molecules into cells and does not involve the metabolic energy of ATP is 
    • A. 

      Phagocytosis.

    • B. 

      Pinocytosis.

    • C. 

      Active transport.

    • D. 

      Diffusion.

    • E. 

      Osmosis.

  • 16. 
    For each molecule of ATP consumed during active transport of swodium and potassium,
    • A. 

      Two Na+ ions are imported and three K+ ions are exported.

    • B. 

      Two Na+ ions are imported and one K+ ion is exported

    • C. 

      One K+ ion is imported and three Na+ ions are exported

    • D. 

      Two K+ ions are imported and three Na+ ions are exported

    • E. 

      Three K+ ions are imported and two Na+ ions are exported.

  • 17. 
    Which of the following processes does not involve the uptake of materials into the cell?
    • A. 

      Exocytosis

    • B. 

      P:inocytosis

    • C. 

      Endocytosis

    • D. 

      Receptor-mediated endocytosis

    • E. 

      Phagocytsis

  • 18. 
    Active transport differs from passive transport in that active transport
    • A. 

      Requires energy.

    • B. 

      Never requires direct input of ATP.

    • C. 

      Moves molecules with a concentration gradient.

    • D. 

      Both a and c

  • 19. 
    Facilitated diffusion and active transport both
    • A. 

      Require ATP.

    • B. 

      Require the use of proteins as carriers

    • C. 

      Carry solutes in only one direction

    • D. 

      Increase without limit as the concentration gradient increases.

    • E. 

      Depend on the solubility of the solute in lipids.

  • 20. 
    The ____ of animal cells resemble the ___ of plant cells.
    • A. 

      Tight junctions; plasma membrane

    • B. 

      Tight junctions; plasmodesmata

    • C. 

      Desmosomes; plasmodesmata

    • D. 

      Gap junctions; plasma membrane

    • E. 

      Gap junctions; plasmosdesmata

  • 21. 
    Receptor-mediated endocytosis
    • A. 

      Is non-specific.

    • B. 

      Allows small molecules to enter cells.

    • C. 

      Results in the formation of clathrin-coated vesicles.

    • D. 

      Directly involves the Golgi apparatus.

    • E. 

      Is anothher name for phagocytosis.

  • 22. 
    The sum total of all the chemical reactions in a living structure is called its
    • A. 

      Energetics

    • B. 

      Activity.

    • C. 

      Digestive power.

    • D. 

      Entropy

    • E. 

      Metabolism

  • 23. 
    Anabolic pathways are usually ____, whereas catabolic pathways are usually ____.  Anabolic pathways are associated with ____ in entropy.
    • A. 

      Endergonic; exergonic; an increase

    • B. 

      Endergonic; exergonic; a decrease

    • C. 

      Exergonic; endergonic; no charge

    • D. 

      Exergonic; endergonic; an increase

    • E. 

      Endergonic; exergonic; no change

  • 24. 
    Which of the following represents potential energy?
    • A. 

      Chemical bonds

    • B. 

      Concentration gradient

    • C. 

      Electric charge imbalance

    • D. 

      Both a and b

    • E. 

      All of the above

  • 25. 
    The first law of thermodynamics states that the total energy in the universe is
    • A. 

      Decreasing

    • B. 

      Increasing

    • C. 

      Constant

    • D. 

      Being converted to free energy

    • E. 

      Being converted to matter

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