Biology  by Bradford
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Membranes and transport: grass skirts

16 quick questions on AP Biology topics 2.3 Plasma Membrane, 2.4 Membrane Permeability, 2.5 Membrane Transport and 2.6 Facilitated Diffusion, each answered in a word or two. Print a sheet for each team, a key for the checker and a tick sheet, then tape the sheets to the board and race.

How it runs

  1. SnipA runner cuts one strip off the bottom of their team’s sheet.
  2. Answer as a pairBack at the table, they write the answer on the strip. No books.
  3. Get it checkedThe checker reads it against the key: you, or a student holding it.
  4. Back for the nextA tick earns the next strip. Wrong? Back to the table to try again.

The questions on this sheet

The checker’s key, with every answer, prints with the sheets.
  1. Double layer with tails facing inward
  2. Proteins drifting in a sea of lipids
  3. Lets some substances cross but not others
  4. O₂ crossing the bilayer with no protein
  5. Solute difference that drives diffusion
  6. Uphill movement of a solute, spending ATP
  7. Taking in material by membrane infolding
  8. Vesicles fusing to secrete their contents
  9. Passive transport via a channel or carrier
  10. Spans the bilayer, like a channel or pump
  11. Loosely bound to the membrane surface
  12. Steroid that buffers membrane fluidity
  13. Sugar-tagged marker for cell recognition
  14. Cell eating: engulfing large particles
  15. Channel that lets water cross fast
  16. Hydrophilic pore that ions pass through

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