Home / iGCSE Biology (0610)-3.3 Active transport – iGCSE Style Questions Paper 1

iGCSE Biology (0610)-3.3 Active transport – iGCSE Style Questions Paper 1

IGCSE Biology (0610) Practice Questions Paper 1 - All Chapters

Question

Which statement describes the net movement of particles by active transport in animal cells?

(A) from a higher concentration to a lower concentration across a cell membrane
(B) from a higher concentration to a lower concentration across a cell wall
(C) from a lower concentration to a higher concentration across a cell membrane
(D) from a lower concentration to a higher concentration across a cell wall
▶️ Answer/Explanation
Active transport is the process by which cells move substances against a concentration gradient, meaning from an area of lower concentration to an area of higher concentration. This process requires energy in the form of $ATP$ and involves specialized carrier proteins. Unlike plants or bacteria, animal cells do not possess a cell wall; therefore, all transport occurs across the cell membrane. Consequently, option (C) is the only description that correctly identifies both the direction of movement and the appropriate cellular structure for an animal cell.
✅ Answer: (C)
Question

The diagrams show the movement of particles across a membrane. The arrows show the direction of movement.
Which diagram shows active transport?

▶️ Answer/Explanation
Solution

Ans: A

Active transport involves the movement of particles against their concentration gradient (from low to high concentration), requiring energy (ATP). In the given diagrams, option A correctly depicts this process, as particles are moving from a region of lower concentration (outside the cell) to a region of higher concentration (inside the cell). This distinguishes it from passive transport (diffusion or osmosis), which occurs without energy input.

Question

Which row shows the features of active transport?

▶️ Answer/Explanation
Solution

Ans: C

Active transport requires energy (✓) and moves substances against their concentration gradient (✓). It’s not limited to water (✗). Only row C matches these criteria, making it the correct answer.

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