Facilitated Diffusion
Trending Questions
- Membranes of some bacteria
- Membrane of ribosomes
- Outer membranes of the mitochondria
- Outer membranes of the plastids
Transport against the concentration gradient can be done without using energy.
True
False
Solubility in lipids
Size of the substances
Both a & b
Living system
What characteristic is shared by simple diffusion and facilitated diffusion?
Both require cellular energy for the transport of substances.
Both involve the movement of water across a semipermeable membrane.
Both require a special carrier molecule to move substances across the membrane.
Both involve the movement of a substance from regions of a higher concentration to lower concentration without cellular energy
True
False
Simple diffusion
Passive diffusion
Facilitated diffusion
Active diffusion
False
True
Identify P, Q & R in the figure
P - Uniport, Q - Symport, R - Antiport
P - Uniport, Q - Antiport, R - Symport
P - Antiport, Q - Symport, R - Uniport
P - Symport, Q - antiport, R - Uniport
- Substances are transported without the use of ATP.
- Causes net transport of molecules from low to high concentration
- Transport rate reaches saturation.
- Very specific and selective to substances
- There is a specific protein carrier for a specific substance to be transported.
- The same protein carrier transports all the substance through the membrane.
- There is no limit to the rate of transport of a substance by facilitated diffusion.
- The rate of transport is limited by saturation, i.e. when all protein carrier molecules are being used.