Neco 2020 Biology Question 40

Practice objective / multiple choice question 40 from the 2020 Neco Biology examination.

Neco 2020 Biology Objective / Multiple Choice Medium Difficulty

Question 40 NECO • 2020 • BIOLOGY • objective

A leaf xylem vessel can be approximated as a cylindrical tube of radius \(0.05\ \text{mm}\) and length \(5\ \text{cm}\). The pressure difference between the root and the leaf is \(0.2\ \text{MPa}\), and the sap viscosity is \(1.0\times10^{-3}\ \text{Pa·s}\). Using the Hagen-Poiseuille equation \( Q = \frac{\pi r^{4} \Delta P}{8 \eta L} \), calculate the volumetric flow rate of water through the vessel in \(\text{mL·min}^{-1}\). Give your answer to two decimal places.

A. 0.45 mL·min^{-1}

B. 0.78 mL·min^{-1}

C. 1.02 mL·min^{-1}

Correct Answer D. 0.59 mL·min^{-1}

Correct Answer

Correct Option:

0.59 mL·min^{-1}

This is Neco 2020 Biology Question 40. It is one of the objective questions from the 2020 Neco Biology examination.

Difficulty level: Medium .

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