Facilitated diffusion is characterized by all,except (1)Requirement of membrane proteins (2) Uphill transport (3)No requirement of energy (4)Highly selective nature
Answers
Answer:
Option 2) Uphill transport
Explanation:
Only active transport is uphill transport&requires ATP
Answer:
(2) Uphill transport is the correct answer
The passive transport of molecules down the concentration gradient is known as facilitated diffusion. It is a selective process, meaning only specific molecules and ions may flow through the membrane. However, it blocks the passage of other molecules across the membrane. The electric charge and pH aid the diffusion of molecules through the membrane.
Explanation:
The process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane by specific transmembrane integral proteins is known as facilitated diffusion (also known as facilitated transport or passive-mediated transport). Because it is passive, facilitated transport does not directly need chemical energy from ATP hydrolysis during the transport step itself. Instead, molecules and ions travel along their concentration gradient, indicating that the process is diffusive.
Simple diffusion and facilitated diffusion are different in several ways.
- The carrier protein or membrane-embedded channel must attach to the payload molecularly for the transport to take place.
- In contrast to free diffusion, which is linear in the concentration difference, the rate of assisted diffusion is saturable about the concentration difference between the two phases.
- Due to an active binding event, the temperature dependency of assisted transport differs significantly from that of free diffusion, where the influence on temperature is minimal.
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