Waec Model Questions Vol1 2024 Biology Question 14
Practice objective / multiple choice question 14 from the 2024 Waec Model Questions Vol1 Biology examination.
A solute diffuses across a cell membrane with a diffusion coefficient D = 2.5 × 10⁻⁶ cm² s⁻¹. The average distance the solute must travel inside the cell is 20 µm.\n\n(a) Estimate the time required for diffusion using t ≈ L²/(2D).\n(b) An active transport protein moves the same solute at a rate of 5 × 10⁻⁸ mol s⁻¹. If the cell needs to transport 1 × 10⁻⁹ mol of solute, which mechanism delivers the solute faster? State the faster mechanism.
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This is Waec Model Questions Vol1 2024 Biology Question 14. It is one of the objective questions from the 2024 Waec Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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