Biology  by Bradford
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IB Biology B2.1 Pub Quiz: Membranes and membrane transport

B2.1 as a pub quiz for your class: review rounds on this subtopic, mixed with pure-fun rounds so it feels like a night out and not another test. Opens at SL; switch to HL in the builder to add the higher level cards.

Print teacher pagesPrint student pagesOpen in the builder to change it

Teacher pages are the quizmaster script and tally sheet. Student pages are the team answer sheet, handout and picture sheet. Both open ready to print, on A4 or US Letter.

What it covers

IB Biology at SL, with HL cards when you switch the level: B2.1 Membranes and membrane transport.

The running order

nine rounds and a handout of riddles. Review rounds are drawn from this topic each time you open the quiz, so two classes never get the same paper, and every review round can be redrawn in a click.

  1. Riddle me this review
    Course terms as riddles: "I have a head that loves water and two tails that hate it…" Teams write what it is.
  2. Close-up fun
    A tiny zoomed-in patch. What's the full picture?
  3. Fact or fiction fun
    Myths and true-but-weird facts. Teams write Fact or Fiction.
  4. Think it through review
    Scenarios, odd ones out, true or false and why, puzzles: questions to reason through. Give teams a little longer.
  5. Films in science-speak fun
    A film plot, described like a research abstract. Name the film.
  6. Who am I? Scientists fun
    Three clues, hardest first. 3 points after clue 1, 2 after clue 2, 1 after clue 3.
  7. Missing vowels: course terms review
    Your key terms with the vowels taken out.
  8. Funny animal noises fun
    YouTube clips of animals making ridiculous noises. Screen off, listen, guess, then watch the reveal.
  9. Closest wins fun
    Estimation questions. Nearest team wins the point. Doubles as the tiebreaker.

A taste of the questions

Think it through

Scenarios, odd ones out and true or false and why, from IB Biology.

  1. Shake me and my kind in water and we line up tail to tail in a double sheet, no cell needed. What about us makes that happen?
  2. Sodium ions are tiny, far smaller than glucose. Why can't they cross a bare phospholipid bilayer?
  3. A drug blocks every protein in a red blood cell's membrane. Can oxygen still get into the cell?
  4. One membrane protein washes off with a salt solution; another comes away only when detergent dissolves the membrane. Which is integral?
  5. True or false: a red blood cell dropped into pure water shrivels up.
  6. In 1992, frog eggs given one new membrane protein swelled and burst in dilute solution, while normal eggs barely changed. What did the protein do?
Answers
  1. We're amphipathic (hydrophobic tails hide from water inside; hydrophilic heads face it on both sides)
  2. They are charged (ions cannot pass the hydrophobic core, so they need channel or pump proteins)
  3. Yes (O₂ is small and non-polar, so it diffuses straight between the phospholipids)
  4. The one needing detergent (it is embedded among the hydrophobic tails, not just attached to a surface)
  5. False (water enters by osmosis, so it swells and bursts)
  6. Let water in fast (it was an aquaporin, a water channel)

Riddle me this

Course terms as riddles. Teams write what it is.

  1. I'm buried deep in the bilayer, often poking out of both sides, and salt water won't wash me off. What am I?
  2. I'm a tunnel through the membrane that only water uses. Frog eggs given me swell and burst in pond water. What am I?
  3. I'm water on the move across a membrane, heading for the side with more dissolved solutes. What am I?
  4. I open to let one kind of ion slip down its gradient for free, then I close again. What am I?
  5. I push particles uphill, against their gradient, and I charge one ATP for the trip. What am I?
Answers
  1. Integral protein
  2. Aquaporin
  3. Osmosis
  4. Channel protein
  5. Active transport

Quickfire

Short recall from the same topics.

  1. Two-layer sheet of amphipathic molecules
  2. How O₂ and CO₂ pass between phospholipids
  3. Net water movement towards more solute
Answers
  1. Phospholipid bilayer
  2. Simple diffusion
  3. Osmosis

How it runs

  1. Open it in the builder. The running order loads ready to go. Swap, add or drop rounds, or draw a round's questions again.
  2. Present it or print it. Present puts each round on the projector in 16:9 with quizmaster notes. Print gives the script, team answer sheets, a picture sheet and a tally sheet on A4 or US Letter, with no projector needed.
  3. Score it. Teams swap sheets, mark, and each plays one joker to double a round. The scores page reveals the leaderboard from last place up.

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