Question

question 1
what is the difference between diffusion and facilitated diffusion?
answer

• diffusion transports substances from a region of higher concentration to a region of lower concentration, while facilitated diffusion transports substances from a region of lower concentration to a region of higher concentration.
• facilitated diffusion requires atp as an energy source and a carrier protein, whereas diffusion does not.
• facilitated diffusion is an active process, while diffusion is a passive process
• facilitated diffusion requires a carrier protein, while diffusion does not.
• i dont know yet

Explanation:

• First option: Both diffusion and facilitated diffusion move from high to low concentration (passive), so this is wrong.
• Second option: Facilitated diffusion is passive and does not need ATP, so this is wrong.
• Third option: Both are passive processes, so this is wrong.
• Fourth option: Facilitated diffusion needs carrier proteins (for large/polar molecules), while simple diffusion does not. This is correct.

Answer:

The fourth option: Facilitated diffusion requires a carrier protein, while diffusion does not.