A researcher is studying facilitated diffusion of a novel solute 'X' across a cell membrane using an artificial lipid bilayer system. They observe that increasing the concentration of X on one side of the membrane increases the rate of transport, but only up to a certain point. Beyond this point, further increases in X concentration do not affect the transport rate. Which of the following BEST explains this observation?
The membrane has reached its maximum permeability for X.
The solute X is being actively transported at higher concentrations.
Saturation of the carrier proteins
The solute X is inhibiting its own transport through feedback regulation.
Related Questions
Water channels are made up of how many different types of aquaporins?
Thirteen
Four
One
Seven
Water channels are made up of how many different types of aquaporins?
Eight
Four
Five
Twenty
What are the aquaporins in facilitated diffusion process?
    Membrane proteins
Carrier proteins
Channel proteins
Carrier lipids
What are the aquaporins in facilitated diffusion process?
    Membrane proteins
Carrier proteins
Channel proteins
Carrier lipids
    Water channels are possessed by a membrane to facilitate the movement of hydrophilic substances.
These channels are made up of
Proteins
Lipids
Carbohydrates
Nucleic acids
Facilitated diffusion involves?
Downhill transport
Without expenditure of energy
Involvement of proteins
All
Active transport
    Releases energy
Requires energy
Produces ATP
Produces a toxic substance
If two molecules A & B move in the same direction. This movement can be called
Antiport
Symport
Uniport
Guttation
Facilitated diffusion does not require/show
Special membrane proteins
Saturation of transport
ATP energy
Selective nature
Aquaporins facilitate the transport of:
Ions
Glucose
Amino acids
Water
