Lesson Plan

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Lesson Plan
Grade: Date: 25/02/2026
Subject: Biology
Lesson Topic: explain how gibberellin activates genes by causing the breakdown of DELLA protein repressors, which normally inhibit factors that promote transcription
Learning Objective/s:
  • Describe the roles of gibberellin, GID1, DELLA proteins and the SCFSLY1/GID2 complex in gene activation.
  • Explain the step‑by‑step mechanism that leads from GA perception to DELLA degradation.
  • Analyze how removal of DELLA permits transcription factors to activate growth‑related genes.
  • Predict phenotypic consequences of mutations that block DELLA degradation.
Materials Needed:
  • Projector and screen
  • PowerPoint/Google Slides with pathway diagram
  • Printed handout of the GA‑DELLA signaling flowchart
  • Whiteboard and markers
  • Clicker or online quiz platform
  • Optional: molecular model kits for protein complexes
 Introduction:
Begin with a striking image of a dwarf versus a tall plant and ask students what hormone might explain the difference. Recall prior knowledge of plant hormones and basic transcription regulation. State that by the end of the lesson students will be able to trace how gibberellin removes the “brake” on growth genes.
Lesson Structure:
  1. Do‑now (5'): Students label a blank GA‑signalling diagram on the handout (quick check).
  2. Mini‑lecture (10'): Overview of GA, GID1, DELLA, SCFSLY1/GID2 using slides; highlight key concepts.
  3. Guided walkthrough (15'): Teacher steps through the five‑step mechanism while students fill in a flowchart.
  4. Interactive simulation (10'): Online animation showing ubiquitination and proteasomal degradation; pause for questions.
  5. Group case study (10'): Analyse a dwarf mutant lacking SCF activity; discuss expected phenotype.
  6. Formative quiz (5'): Clicker questions to assess understanding of each pathway step.
Conclusion:
Summarise the cascade from GA perception to transcription activation, emphasizing the “brake‑release” analogy. Students complete an exit ticket by writing one sentence that explains how GA activates genes. Assign homework: read the textbook section on gibberellin signalling and produce a labeled diagram of the pathway.