Can passive and active transport occur in dead cell?Explain
The definitive answer is: it depends.
It depends on how the cell "died". Most forms of cell death include
getting holes in the membrane, and if that happens any type of
transport (active or passive) is pretty much impossible. The transport
proteins might still be working, but whatever they're moving across
the membrane would just leak back through the holes, so there's no
If there aren't holes in the membrane, then passive transport should
still work. For active transport, it depends again. Usually for active
transport you just need the transporter and an energy source (like
ATP). As long as the energy source is still around, active transport will
still go on. Chances are, though, that the dead cell isn't making more
ATP as the old is used up, so pretty soon it will run out and active
transport will stop.
Other forms of active transport don't use ATP directly, but they still
count on the cell using energy. When the cell dies, those transporters
will also stop working before long.
Aug 08, 2011 |
Health & Beauty