Question
Which row describes active transport?
▶️ Answer/Explanation
Solution
Ans: C
Active transport moves substances against their concentration gradient (from low to high concentration), requiring energy (ATP) and often using protein pumps.
Option C correctly states that particles move from low to high concentration with energy use, distinguishing it from passive transport (A, B) or osmosis (D).
Question
Which statement about active transport is correct?
▶️ Answer/Explanation
Solution
Ans: C
Active transport moves particles against their concentration gradient (from low to high concentration) using energy from ATP. This distinguishes it from passive processes like diffusion or osmosis.
Why not the others?
- A: Incorrect – Active transport occurs across cell membranes.
- B: Incorrect – It requires energy (ATP).
- D: Incorrect – Water movement is osmosis, not active transport.
