AP BIOLOGY

Detailed explanation-1: -High oxygen tensions strikingly suppress the rate of growth in tissue culture of various cell types (1, 2).

Detailed explanation-2: -Cell growth occurs when the overall rate of cellular biosynthesis (production of biomolecules or anabolism) is greater than the overall rate of cellular degradation (the destruction of biomolecules via the proteasome, lysosome or autophagy, or catabolism).

Detailed explanation-3: -What limits cell sizes and growth rates? Cell growth is limited by rates of protein synthesis, by the folding rates of its slowest proteins, and-for large cells-by the rates of its protein diffusion.