Plasma Membrane and Transport
A single celled microorganism isolated from the Atlantic ocean was accidentally cultured in a medium formulated for fresh water microorganism. What probably happened to the organism?
|A||The cell shriveled up and died due to exocitosis of salt.|
|B||The cell swelled and burst due to osmosis of water.|
|C||The cell died because the membrane transport proteins would not function properly in the new environment.|
|D||The cell would try to take up as much sodium as possible via endocytosis from the medium.|
The microorganism is adapted to life in a high salt environment. Remember that water can freely diffuse across cell membranes. Therefore, the tonicity of the organism was probably well suited to its environment. Placing the cell in the fresh water medium, which was hypotonic to the cell, would have caused water to rush into the cell,
thereby lysing it.