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IB Biology HL A2.2.9 Atypical Cell Structure Questions

Practise IB Biology HL A2.2.9 by explaining why red blood cells, sieve tubes, muscle fibres and aseptate hyphae are atypical cell structures.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify atypical structures such as striated muscle fibres, aseptate hyphae, sieve tubes and mature red blood cells.
  • Explain how multiple nuclei, absent nuclei or unusual compartmentalization challenge simple cell-theory expectations.
  • Use observations from atypical cells to distinguish structural exceptions from ordinary eukaryotic cells.

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Study A2.2.9—Atypical cell structure conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL A2.2.9 Atypical Cell Structure Questions question 1

[Maximum number: 1]

The diagram shows the bones and muscles of the human elbow joint.

Figure for Question IB Biology HL A2.2.9 Atypical Cell Structure Questions question 1 — IB Biology HL

State one reason that striated muscle cells are considered atypical.

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