Gce Model Questions Vol1 2019 Biology Question 44
Practice objective / multiple choice question 44 from the 2019 Gce Model Questions Vol1 Biology examination.
In a leaf, CO\(_2\) diffuses across a membrane that is \(2\) µm thick. The diffusion coefficient for CO\(_2\) in the membrane is \(2.5\times10^{-5}\) cm\(^2\) s\(^{-1}\) and the concentration difference across the membrane is \(0.15\) mol m\(^{-3}\).\n(a) Using Fick's first law, calculate the flux of CO\(_2\) (in mol m\(^{-2}\) s\(^{-1}\)).\n(b) If the leaf area available for diffusion is \(10\) cm\(^2\) and the plant increases this effective area by \(20\)%, what is the new total rate of CO\(_2\) entry (in mol s\(^{-1}\))? Give your answer in scientific notation to two significant figures.
Answer Options
About This Question
This is Gce Model Questions Vol1 2019 Biology Question 44. It is one of the objective questions from the 2019 Gce Model Questions Vol1 Biology examination.
Difficulty level: Medium .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.