Neco Model Questions Vol1 2018 Biology Question 1

Practice practical question 1 from the 2018 Neco Model Questions Vol1 Biology examination. This question covers Cell Structure .

Neco Model Questions Vol1 2018 Biology Practical

Topic: Cell Structure

Question 1 NECO_MODEL_QUESTIONS_VOL1 • 2018 • BIOLOGY • practical

A student prepares a squashed slide of cheek epithelial cells stained with methylene blue. Using an ocular micrometer calibrated at 0.01 mm per division, the longest diameter of ten cells is measured as follows (in mm): 0.12, 0.13, 0.11, 0.12, 0.14, 0.13, 0.12, 0.13, 0.11, 0.12. Assume the cells are approximately spherical.

Question Parts

( a )

Calculate the mean cell diameter.

( b )

Using the mean diameter, estimate the average cell volume (V = 4⁄3 π r³) and surface area (A = 4 π r²). Give each answer to two decimal places and express the results in µm³ for volume and µm² for surface area.

( c )

Discuss how a high surface‑area‑to‑volume (SA:V) ratio benefits diffusion of nutrients in epithelial cells.

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About This Question

This is Neco Model Questions Vol1 2018 Biology Question 1. It is one of the practical questions from the 2018 Neco Model Questions Vol1 Biology examination.

The question covers Cell Structure .

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