Question

Identify the factors that limits cell size?

Answer 1

Factors limiting the size of cells include:Surface area to volume ratio. (surface area / volume)

Nucleo-cytoplasmic ratio.

Fragility of cell membrane.

Mechanical structures necessary to hold the cell together (and the contents of the cell in place)

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Answer 2

• Volume - surface area ratio-cell dependent on surface area for diffusion if gets too big, must divide.
• Nucleus- must have enough DNA to support size if not, must divide ex: paramecium have 2 nuclei to support cell size.
• Contact inhibition- if too many (overcrowded) = stop mitosis.
• Anchorage- must be anchored to reproduce.
• Growth factors- kinase and cyclins influence mitosis