Neco Model Questions Vol1 2021 Biology Question 15

Practice objective / multiple choice question 15 from the 2021 Neco Model Questions Vol1 Biology examination.

Neco Model Questions Vol1 2021 Biology Objective / Multiple Choice Medium Difficulty
Question 15 NECO_MODEL_QUESTIONS_VOL1 • 2021 • BIOLOGY • objective

A plant cell membrane has a permeability coefficient for glucose of \(1.2 \times 10^{-5}\ \text{cm s}^{-1}\). The external glucose concentration is \(5\ \text{mM}\) and the internal concentration is \(0.5\ \text{mM}\). The membrane surface area is \(2000\ \mu\text{m}^2\). (i) Calculate the diffusive flux \(J\) of glucose (in \(\text{mol cm}^{-2}\text{s}^{-1}\)). (ii) Determine the amount of glucose (in \(\text{mol}\)) that enters the cell in one minute.

Answer Options

A. (i) 5.4 × 10⁻¹⁰ mol·cm⁻²·s⁻¹; (ii) 6.5 × 10⁻¹³ mol
Correct Answer B. (i) 5.4 × 10⁻¹¹ mol·cm⁻²·s⁻¹; (ii) 6.5 × 10⁻¹⁴ mol
C. (i) 5.4 × 10⁻¹¹ mol·cm⁻²·s⁻¹; (ii) 6.5 × 10⁻¹³ mol
D. (i) 4.3 × 10⁻¹¹ mol·cm⁻²·s⁻¹; (ii) 5.2 × 10⁻¹⁴ mol
Correct Answer
B
Correct Option:
(i) 5.4 × 10⁻¹¹ mol·cm⁻²·s⁻¹; (ii) 6.5 × 10⁻¹⁴ mol

About This Question

This is Neco Model Questions Vol1 2021 Biology Question 15. It is one of the objective questions from the 2021 Neco Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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