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Cell Structure · Paper 1 — Free Biology SL Practice Questions

1FoundationMCQProkaryotic vs eukaryotic cells1 markPaper 1~2 min
A newly discovered unicellular organism has a single circular chromosome located in a region of cytoplasm not enclosed by a membrane, and contains 70S ribosomes. Which statement correctly classifies this organism and identifies the most direct structural evidence for that classification?
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Solutions

2MasteryMCQProkaryotic vs eukaryotic cells1 markPaper 1~2 min
In E. coli, ribosomes can begin translating an mRNA molecule before transcription of that molecule is complete. This coupled transcription–translation does not occur in human liver cells. What is the most direct structural explanation for this difference?
diagram

Solutions

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