As Level Cell Membrane Test

15 Questions  I  By Masy171
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Cell Membrane Quizzes & Trivia
A selection of multiple choice and missing word questions about cell membrane structure and the movement of substances across it.

  
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Questions and Answers

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  • 1. 
    The function of  a cell membrane is to .................... what enters and leaves a cell

  • 2. 
    Membranes are made up of two layers of what?
    • A. 

      Proteins

    • B. 

      Carbohydrates

    • C. 

      Lipids

    • D. 

      Phospholipids


  • 3. 
    Polar heads of phospholipids are said to be what?

  • 4. 
    Hydrocarbon tails of phospholipids are said to be what?

  • 5. 
    What model was proposed for the cell membrane?
    • A. 

      Fluid tile

    • B. 

      Rigid mosaic

    • C. 

      Fluid mosaic

    • D. 

      Fluid square

    • E. 

      Rigid square


  • 6. 
    Intrinsic proteins span how far into the membrane?
    • A. 

      Width

    • B. 

      Length

    • C. 

      Part

    • D. 

      Outer side

    • E. 

      Inner side


  • 7. 
    Extrinsic proteins span how far into the membrane?
    • A. 

      Width

    • B. 

      Length

    • C. 

      Part

    • D. 

      Outer side

    • E. 

      Inner side


  • 8. 
    Cell membranes have the following functions
    • A. 

      Controlling the passage of materials in and out of cells

    • B. 

      Recognition of other cells

    • C. 

      Receptor sites for hormones and neurotransmitters

    • D. 

      Transmission of nerve impulses

    • E. 

      Insulation of nevers


  • 9. 
    Molecules can move across membranes by?

  • 10. 
    Diffusion occurs ................... no ATP

  • 11. 
    Osmosis is the;
    • A. 

      Movement of substances down a gradient

    • B. 

      Net movement of water across a ppm from an area of high concentration to an area of low concentration

    • C. 

      Net movement of water across a ppm from an area of low concentration to an area of high concentration

    • D. 

      Net movement of water from an area of high concentration to an area of low concentration


  • 12. 
    Changes shape to help move molecules through the membrane

  • 13. 
    Forms tunnels in the membrane for water soluble molecules to move through

  • 14. 
    Active transport does the following
    • A. 

      Uses ATP

    • B. 

      Moves substances with a concentration gradient

    • C. 

      Moves substances against a concentration gradient

    • D. 

      Is a passive process


  • 15. 
    Two forms of bulk transport are?
    • A. 

      Epicytosis

    • B. 

      Endocytosis

    • C. 

      Englocytosis

    • D. 

      Exocytosis

    • E. 

      Exophlytosis


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