passwella.
Menu

WAEC Biology 2018 Question 6

Question 6

Cell and Its Environment

Active transport differs from diffusion in that active transport

  1. A.is a very fast process
  2. B.allows the movement of substances against concentration gradient.
  3. C.takes place in both light and dark reactions of photosynthesis.
  4. D.occurs in both plant and animal tissues.
Show the answer and explanation

Answer: B (allows the movement of substances against concentration gradient.)

Explanation

Active transport uses energy (ATP) to move substances from a low to a high concentration. Diffusion only moves them down the gradient, from high to low.