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Growth and reproduction of cells Original Scenario-Based Practice

Biology · Cell Communication & the Cell Cycle · Biology · Cell Cycle & Cell Division

1 Biology practice questions on Growth and reproduction of cells. Questions built around original scenarios.

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  1. 1.

    Astrobiologists cultivating Aerosphaera, an engineered giant unicellular organism aboard an orbital station, notice that as an individual cell doubles its diameter during the growth phase, its metabolic activity slows drastically. Physiological assays confirm that while the cell volume expanded eightfold, its membrane surface area increased by only fourfold, severely restricting nutrient uptake relative to metabolic demand. Which biological process directly resolves this physical limitation to sustain efficient growth and cellular reproduction?

    • A) The cell enters an irreversible G0 resting state to permanently dismantle its ribosomes and minimize surface area.
    • B) The cell activates mitotic division and cytokinesis, generating smaller daughter cells with higher surface-area-to-volume ratios.
    • C) The cell undergoes continuous endoreplication without division, multiplying genomic copies to outpace diffusion limits.
    • D) The cell dissolves its plasma membrane to fuse into a syncytium, eliminating physical diffusion barriers across boundaries.

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