Biology  by Bradford
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IB Biology B2.2 Pub Quiz: Organelles and compartmentalization

B2.2 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: B2.2 Organelles and compartmentalization.

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. Ribosome, vesicle, nucleus, cell wall: which is the odd one out, and why?
  2. Mitochondria could only be studied on their own once they could be separated from the rest of the cell. Which machine made that possible?
  3. In bacteria, ribosomes start translating an mRNA before it is even fully transcribed. Why can't that happen in your cells?
  4. I'm a little sac full of enzymes that could digest the whole cell around me, yet the cell stays perfectly safe. Why?
  5. Lysosome enzymes work best at about pH 5, but the cytoplasm is near pH 7.2. Why does a small leak of them do little harm?
  6. A white blood cell engulfs a bacterium. Where in the cell is the bacterium digested, safely away from the cytoplasm?
Answers
  1. The cell wall (not an organelle: it lies outside the plasma membrane, not a discrete subunit in the cell)
  2. The ultracentrifuge (spinning broken cells very fast separates organelles by size and density)
  3. The nuclear membrane separates them (mRNA is made in the nucleus but translated in the cytoplasm)
  4. My membrane keeps the enzymes in (compartmentalization)
  5. They work poorly at the cytoplasm's neutral pH (so leaked enzymes are nearly inactive)
  6. In a phagocytic vacuole (lysosomes fuse with it and add their enzymes)

Riddle me this

Course terms as riddles. Teams write what it is.

  1. I spin broken cells so fast that their parts settle out in layers. Without me, nobody could study a mitochondrion on its own. What am I?
  2. My double wall keeps the DNA in and the ribosomes out, so messages get edited before they leave. What am I?
  3. I'm a bag of acid and digestive enzymes: the cell's recycling centre, and its executioner if I burst. What am I?
  4. I'm the art of keeping clashing jobs in separate rooms, so enzymes stay concentrated and the cell never digests itself. What am I?
  5. I form when a white blood cell swallows a bacterium, and lysosomes then pour their enzymes into me. What am I?
Answers
  1. Ultracentrifuge
  2. Nucleus
  3. Lysosome
  4. Compartmentalization
  5. Phagocytic vacuole

Quickfire

Short recall from the same topics.

  1. Discrete subunit of a cell with a function
  2. Breaking cells and separating organelles
  3. Machine spinning samples at high speed
Answers
  1. Organelle
  2. Cell fractionation
  3. Ultracentrifuge

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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