What is active transport?

What is active transport?
  1. A process that uses energy to move molecules down a concentration gradient
  2. A process that uses energy to pump molecules against a concentration gradient
  3. A process that uses energy to move molecules up a concentration gradient
  4. A process that uses energy to move molecules down and against a concentration gradient

Solution

Active transport uses energy to pump molecules against a concentration gradient, meaning from a high concentration to a low concentration.

Asked in: NCERT

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