Unit 2: Form and Function
Topic 2.4: Cell Specialization Questions
Practice 20 exam-style questions for IB Biology Topic 2.4. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1Identify1 mark
According to the endosymbiotic theory, where did mitochondria and chloroplasts originally come from?
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Which free-living organism is thought to be the ancestor of the mitochondrion?
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State one organelle or structure found in both prokaryotic and eukaryotic cells.
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Which organelle is found in plant cells but NOT in animal cells?
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Which structure is found in BOTH prokaryotic and eukaryotic cells?
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State what is meant by the term compartmentalization in a eukaryotic cell.
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Plant cells and animal cells are both eukaryotic.
State two organelles or structures found in plant cells but not in animal cells, and state two structures that are present in BOTH plant and animal cells.
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In a pancreatic cell, one organelle packages and modifies polypeptides into enzyme-containing vesicles for export.
State the name of this organelle.
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An organelle is described as the site of aerobic respiration that releases energy for the cell.
Which organelle is it?
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What is meant by compartmentalization in a eukaryotic cell?
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State the process by which the ancestral host cell took the free-living bacterium inside itself.
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Explain how the endosymbiotic theory accounts for the origin of the mitochondrion in eukaryotic cells.
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What is the function of the nucleus in a eukaryotic cell?
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A photosynthetic bacterium was engulfed and kept by a host cell.
Which organelle did it become?
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Mitochondria and chloroplasts can increase in number inside a living cell.
By which bacterial-style process do they do this?
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By which process did the ancestral host cell take the free-living bacterium inside itself?
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Which organelle is found in plant cells but NOT in animal cells, and is the site of photosynthesis?
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Unlock Question18Compare and contrast3 marks
Compare and contrast the mitochondrion and the chloroplast in terms of their endosymbiotic origin, the free-living ancestor each came from, and the job each does inside the host cell.
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In a pancreatic cell, which organelle packages and modifies polypeptides into enzyme-containing vesicles for export?
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Which observation is the strongest evidence that mitochondria were once free-living bacteria?
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