Cell Membrane And Transport Quiz: MCQ Test!

46 Questions | Total Attempts: 1799

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Cell Membrane And Transport  Quiz: MCQ Test!

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Questions and Answers
  • 1. 
    What is the cell membrane composed of?
    • A. 

      Phospholipid bilayer with many other organic compounds

    • B. 

      Long amino acid chains

    • C. 

      Just a phospholipid bilayer

    • D. 

      Cytosol and eukaryotes

  • 2. 
    "That only certain things may enter or exit the cell, whereas others are not permitted to cross the cell membrane" is the best definition for what word?
    • A. 

      Selective transport

    • B. 

      Cell Membrane

    • C. 

      Selectively permeable

    • D. 

      Active Transport

  • 3. 
    What is the polar head of a phospholipid made of?
    • A. 

      Fatty Acids

    • B. 

      Vesicles

    • C. 

      Proteins

    • D. 

      Glycerol

  • 4. 
    The specific structure of the cell membrane depends on the function of the cell. Certain cells do not need what is needed in other cells?
    • A. 

      Phospholipids

    • B. 

      Carbohydrates

    • C. 

      Proteins

    • D. 

      Waxes

  • 5. 
    In the phospholipid bilayer which ways do the nonpolar tails face?
    • A. 

      Towards the interior

    • B. 

      Towards the exterior

    • C. 

      The directions are scattered

    • D. 

      No tails exist in the phospholipid bilayer

  • 6. 
    What is the cytoplasm made of?
    • A. 

      Microfibers

    • B. 

      The liquid cytosol

    • C. 

      Carbon dioxide and iron

    • D. 

      Plasma membrane

  • 7. 
    Where are peripheral proteins attached?
    • A. 

      The surface of the cell membrane

    • B. 

      The rough endoplasmic reticulum

    • C. 

      The golgi apparatus

    • D. 

      The interior of the cell membrane

  • 8. 
    Proteins are not embedded in the cell membrane.
    • A. 

      True

    • B. 

      False

  • 9. 
    Integral/ transmembrane proteins include what structure?
    • A. 

      Pumps

    • B. 

      Cell membrane

    • C. 

      Protein channels and carrier proteins

    • D. 

      Vesicles

  • 10. 
    Peripheral proteins are linked to lipids or proteins via strong bonds.
    • A. 

      True

    • B. 

      False

  • 11. 
    What organic compound is often attached to integral proteins?
    • A. 

      Carbohydrates

    • B. 

      Proteins

    • C. 

      Lipids

    • D. 

      DNA

  • 12. 
    What steroid is also embedded into the cell membrane? (This steroid reduces the fluidity of the cell membrane so it has some structure).
  • 13. 
    What is the main purpose of a cell?
    • A. 

      No real purpose

    • B. 

      To house little tiny elves

    • C. 

      Keep organisms structured

    • D. 

      To maintain homeostasis

  • 14. 
    What is the best definition of equilibrium?
    • A. 

      Slightly higher concentration outside the cell compared to the inside of the cell

    • B. 

      Equal amounts of a cell in different parts of an organism

    • C. 

      Equal concentrations of a substance inside and outside of the cell

    • D. 

      Slightly lower concentration inside the cell compared to the outside of the cell

  • 15. 
    What is one of the most important ways cells maintain homeostasis?
    • A. 

      Keeping the amount of cytoplasm at a certain level

    • B. 

      Keeping all the organelles of the cell healthy

    • C. 

      Controlling what the organelles in the cell do

    • D. 

      Controlling what moves across the cell membrane

  • 16. 
    Molecules prefer to congregate in one area.
    • A. 

      True

    • B. 

      False

  • 17. 
    The concentration gradient determines what?
    • A. 

      How fast a molecule crosses the membrane

    • B. 

      How fast the cell will fill up

    • C. 

      How fast the cell can move

    • D. 

      How fast the flagellum will be able to grab onto an object

  • 18. 
    The difference between concentrations is known as what?
  • 19. 
    If the concentrations are vastly different the molecules will move ___________, if the concentrations are similar the molecules will move  ___________.
    • A. 

      Slowly/quickly

    • B. 

      Quickly/slowly

    • C. 

      Quickly/at the same speed

    • D. 

      At the same speed/slowly

  • 20. 
    Equilibrium is..
    • A. 

      When one level of concentration is only slightly higher then the other

    • B. 

      When one level of concentration is only slightly lower then the other

    • C. 

      When two areas have reached equal concentration levels

    • D. 

      When water and another substance are mixed

  • 21. 
    Substance molecules will not stop moving when equilibrium is reached.
    • A. 

      True

    • B. 

      False

  • 22. 
    What are the three types of passive transport?
    • A. 

      Simple diffusion, facilitated diffusion and pumps

    • B. 

      Exocytosis, endocytosis, pumps

    • C. 

      Exocytosis, endocytosis, osmosis

    • D. 

      Simple diffusion, facilitated diffusion, and osmosis

  • 23. 
    Simple diffusion occurs when?
    • A. 

      When something moves from a higher concentration to a lower concentration randomly

    • B. 

      When something moves from a lower concentration to a higher concentration

    • C. 

      When something stays the same concentration

    • D. 

      When something starts to eat away at the cell membrane

  • 24. 
    When does active transport occur?
    • A. 

      When energy is needed to feed the cell

    • B. 

      When no energy is needed to help substances move

    • C. 

      When energy is needed to move a substance across the cell membrane

    • D. 

      When small bits of energy are needed to make the cell move more quickly

  • 25. 
    Active transport requires energy.
    • A. 

      True

    • B. 

      False