Which type of membrane transport requires energy and moves substances against their concentration gradient?

A Simple diffusion

B Facilitated diffusion

C Osmosis

D Active transport

✓ Correct Answer: Option D

Active transport uses ATP to move molecules across a membrane from an area of lower concentration to an area of higher concentration, against the concentration gradient. The other options are passive processes.

💡 Why is D) the correct answer?

The correct answer to the question "Which type of membrane transport requires energy and moves substances against their concentration gradient?" is Option D: Active transport.

The other options — A) Simple diffusion, B) Facilitated diffusion, C) Osmosis — are incorrect for this IB Exam Prep question. As explained above: Active transport uses ATP to move molecules across a membrane from an area of lower concentration to an area of higher concentration, against the concentration gradient. The other options are passive…

📚 About This IB Exam Prep Practice Question

This 1-level IB Exam Prep question from the Biology topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free IB Exam Prep practice test or use flashcards for spaced repetition review.

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Which type of membrane transport requires energy and moves substances against their concentration gradient?

✓ Correct Answer: Option D

📚 About This IB Exam Prep Practice Question

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