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Organelles and Compartmentalization · Paper 1 — Free Biology HL Practice Questions

What this topic covers

This theme is built on one repeated argument: structure exists because it does a job, and you can predict the job from the structure. Examiners test this exact logic at every scale — a motor protein's shape tells you which way it walks a microtubule, a red blood cell's missing nucleus tells you why it can pack more haemoglobin, a gill's countercurrent geometry tells you why it out-performs a lung-style parallel flow. Several chunks here — muscle and motility, enzyme kinetics, endosymbiotic theory, detailed phloem loading — exist only on the HL paper, and they're flagged below. Get the mechanism words right (troponin, not tropomyosin; ATP-binding, not hydrolysis) because that's where the marks actually sit.

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1FoundationMCQCompartmentalization of processes in eukaryotic cells1 markPaper 1~2 min

A eukaryotic cell carries a mutation that completely prevents Golgi apparatus formation. Which cellular process is most directly disrupted by this mutation?

Solutions

2FoundationMCQCompartmentalization of processes in eukaryotic cells1 markPaper 1~2 min

A drug disrupts the membranes of all membrane-bound organelles in a eukaryotic cell. Following treatment, the cell is unable to digest its own damaged organelles. Which organelle is most directly responsible for this process?

Solutions

3MasteryMCQCompartmentalization of processes in eukaryotic cells1 markPaper 1~2 min

In eukaryotic cells, the reactions of aerobic respiration are divided between the cytoplasm and the mitochondria: glycolysis occurs in the cytoplasm, while the Krebs cycle and oxidative phosphorylation occur within the mitochondrion. Which of the following best explains a cellular advantage of this compartmentalization?

Solutions

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