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AP® Biology · Unit 2 · Topic 2.10

Origins of Cell Compartmentalization: Topic Checklist (Biology 2.10)

Specific “I can…” statements for comparing prokaryotic and eukaryotic compartmentalization and arguing for endosymbiosis, each linked to the section or question that tests it.

Work through the list without notes. If you cannot do a statement, follow its link, then come back. Guide = study guide; Practice = practice questions.

Understanding

  • I can describe the specialized internal regions of a prokaryotic cell, such as the nucleoid and the plasma membrane’s role in respiration, and explain why they are not membrane-bound organelles. (Guide: “Inside a prokaryotic cell”; Practice Q5)
  • I can name the structures that prokaryotic and eukaryotic cells share and those only eukaryotes have. (Guide: comparison table; Practice Q1, Q5)
  • I can explain how the internal membranes of a eukaryotic cell divide it into regions with specialized jobs. (Guide: “Inside a eukaryotic cell”)
  • I can outline the steps by which mitochondria and then chloroplasts arose by endosymbiosis, and explain why plants have both. (Guide: Figure 1)
  • I can explain why modern mitochondria and chloroplasts cannot live on their own. (Guide: “Since then: dependence”; Practice Q6)

Calculation and skills

  • I can calculate percentage sequence identity and say which organism is the closest relative. (Guide: Worked example 1; Practice Q3, Q4)
  • I can calculate the percentage of protein synthesis remaining after a drug treatment. (Guide: Worked example 2)
  • I can calculate surface area to volume ratios and total membrane area per unit volume for model cells. (Practice Q7)

Reasoning

  • I can list at least four independent lines of evidence for endosymbiosis and explain how each supports it. (Guide: “The evidence”; Practice Q2, Q4)
  • I can build a claim–evidence–reasoning argument from data on an unfamiliar structure. (Guide: Worked examples 1 and 2; Practice Q4)
  • I can describe a result that would weaken the endosymbiosis claim and explain why. (Practice Q4)
  • I can evaluate an argument against endosymbiosis by separating an organelle’s origin from its present-day dependence. (Practice Q6)

All ticked? Move on to Topic 3.1, Enzymes, or return to the course roadmap.

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