Growth and reproduction of cells Original Scenario-Based Download PDF

Questions

1. 1.

   On the orbital laboratory Aegis, bioengineers cultivate glowing "Chronocytes" engineered to metabolize ambient nutrient mist and repair station hulls. The researchers discover that whenever a spherical chronocyte's radius triples, its metabolic exchange falters and cellular distress triggers unless the cell immediately enters the cell cycle to divide into two smaller entities. Based on the fundamental biological principles of cell growth and reproduction, which statement best explains why these cells must reproduce rather than continue expanding indefinitely?

   • A) Tripling the cell radius causes the surface area to expand twenty-seven times faster than the volume, generating structural instability across the outer membrane.
   • B) Volume increases as a cubic function while surface area increases as a square, drastically reducing the rate of membrane transport per unit of active cytoplasm.
   • C) Dividing into daughter cells permanently doubles the diploid chromosome count, allowing the new cells to synthesize enzymes at exponentially higher rates.
   • D) Continued enlargement permanently inactivates DNA replication machinery, leaving physical cytoplasmic cleavage as the only viable survival response.