Neco 2022 Biology Question 43
Practice objective / multiple choice question 43 from the 2022 Neco Biology examination.
A student investigates the temperature dependence of starch diffusion through a semi‑permeable membrane. The distance travelled by the starch front is fixed at 5 cm. The times recorded at three temperatures are: 20 °C - 40 min, 30 °C - 25 min, 40 °C - 15 min. Assuming the diffusion rate (distance per time) is proportional to the diffusion coefficient \(D\), and that \(D\) follows the Arrhenius relationship \(D = D_{0} e^{-E_{a}/(RT)}\), estimate the activation energy \(E_{a}\) (in kJ·mol⁻¹). Use \(R = 8.314\) J·mol⁻¹·K⁻¹ and convert temperatures to Kelvin.
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About This Question
This is Neco 2022 Biology Question 43. It is one of the objective questions from the 2022 Neco Biology examination.
Difficulty level: Hard .
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