Which of the following pair is selective and specific mode of transport?
Passive transport and active transport
Passive transport and facilitated diffusion
Facilitated diffusion and active transport
Simple diffusion and facilitated diffusion
Related Questions
Which of the following statements regarding facilitated diffusion is INCORRECT?
It requires transport proteins.
It is a passive process and does not require energy.
It can move molecules against their concentration gradient.
Transport proteins involved can become saturated.
What happens to the rate of facilitated diffusion as the concentration of the transported molecule increases?
It increases linearly
It decreases
It reaches a maximum rate (saturation)
It remains constant
Read the following statements regarding porins and select the correct option given below
I. Porins are transport proteins
II. Channel proteins are a type of transport protein, which are usually gated
III. Carrier protein binds the particular solute to be transported
IV. Particular solute is delivered to the other side of the membrane by carrier proteins
I, II and III
I, III and IV
I, II, III and IV
I and IV
Facilitated diffusion does not require/show
Special membrane proteins
Saturation of transport
ATP energy
Selective nature
Which statement can be shared by facilitated diffusion and active transport?
Both need carrier transporter, which are sensitive to inhibitors that reacts with protein side chains
Energy is required by both the processes
No energy expenditure in these processes
Both use carbohydrates to move molecules
across the membrane
Active transport differs from facilitated transport as the former
Requires special membrane protein
Is highly selective
Shows response to protein inhibitors
Is ATP dependent
In a hypothetical cell, the facilitated diffusion of a solute 'Y' is observed to be significantly faster than predicted by simple diffusion models. However, the transport rate plateaus at high concentrations of Y. Which of the following is the MOST likely explanation for this observation?
The cell membrane is selectively permeable to Y.
The solute Y is transported via carrier proteins.
The solute Y is undergoing active transport.
The cell is modifying Y during transport.
Which characteristic distinguishes facilitated diffusion from simple diffusion across a biological membrane?
Movement down a concentration gradient
Specificity for the transported molecule
Passive transport requiring no energy input
Dependence on membrane fluidity
If two molecules A & B move in the same direction. This movement can be called
Antiport
Symport
Uniport
Guttation
What is mandatory in the process of facilitated diffusion?
Presence of concentration gradient
A carrier protein
A hydrophilic moeity
All of the above
