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.
1Explain1 mark
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Explain how the endosymbiotic theory accounts for the origin of the mitochondrion in eukaryotic cells.
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A photosynthetic bacterium was engulfed and kept by a host cell.
Which organelle did it become?
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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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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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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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According to the endosymbiotic theory, where did mitochondria and chloroplasts originally come from?
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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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State one organelle or structure found in both prokaryotic and eukaryotic cells.
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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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What is the function of the nucleus in a eukaryotic cell?
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State what is meant by the term compartmentalization in a eukaryotic cell.
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Which free-living organism is thought to be the ancestor of the mitochondrion?
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Which group of structures is found in EVERY cell, whether prokaryotic or eukaryotic?
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A cell is found to contain a very large number of mitochondria.
What does this most likely tell you about the cell?
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Why does concentrating the enzymes and substrates for a process inside one compartment speed that process up?
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Outline how the structure of a mitochondrion is suited to its function.
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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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Which organelle is NOT surrounded by its own membrane?
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