Select all that is correct

Active transport requires ATP and moves down the concentration gradient.
• b Passive transport includes osmosis and diffusion.
• c Cellular transport is the exchange of molecules across the cell membrane.
• d Osmosis is the movement of water fromn a solution with high concentration of water to a solution with lower concentration of water.

1 answer

Let's evaluate each statement to determine which ones are correct:

  • a: "Active transport requires ATP and moves down the concentration gradient."

    • This statement is incorrect. Active transport requires ATP but moves against the concentration gradient (from low to high concentration), not down the gradient.
  • b: "Passive transport includes osmosis and diffusion."

    • This statement is correct. Passive transport does include both osmosis (the movement of water) and diffusion (the movement of solutes) and occurs without the use of energy.
  • c: "Cellular transport is the exchange of molecules across the cell membrane."

    • This statement is correct. Cellular transport refers to the processes that involve the movement and exchange of molecules across the cell membrane.
  • d: "Osmosis is the movement of water from a solution with high concentration of water to a solution with lower concentration of water."

    • This statement is correct, although it could be more precisely stated. Osmosis is the movement of water from a hypotonic solution (high concentration of water, low concentration of solutes) to a hypertonic solution (low concentration of water, high concentration of solutes).

So, the correct statements are:

  • b
  • c
  • d