Target: distinguish ribosome, rough ER and Golgi functions in one illustrative secretory-cell pathway. Prepare: Card C and organelle jobs.
- Launch · 2 min. Ask whether a Golgi apparatus assembles the amino-acid chain; retain ideas for checking.
- Model · 4 min. Show an original word sequence:
ribosome on rough ER → ER processing → Golgi modification/sorting → product leaves cell. Ribosomes assemble protein; the route represents some secreted proteins, not every protein. - Guided reading · 5 min. Compare rough ER and smooth ER: rough has attached ribosomes; smooth does not and participates in lipid synthesis/other cell-specific jobs. Point out that “rough” describes ribosome appearance, not texture a learner can feel.
- Practice route · 7 min. Choose Day 6 route; sequence four labelled job cards and give one function plus one pathway limit.
- Audit · 4 min. Partner swaps Golgi and ribosome; learner restores order and explains each role rather than relying on position.
- Exit · 3 min. “Which structure directly assembles the protein?” Key: ribosome; Golgi later modifies/sorts many products.